Refine Search

New Search

Results in Journal Jurnal Ilmu-Ilmu Pertanian Indonesia: 77

(searched for: journal_id:(2122768))
Page of 2
Articles per Page
by
Show export options
  Select all
Arum Saputri, Loekas Soesanto, Abu Umayah, Agus Sarjito
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 70-78; doi:10.31186/jipi.22.2.70-78

Abstract:
[EXPLORATION AND VIRULENT TEST OF MAIZE ENDOPHYTE Bacillus sp. AGAINST MAIZE SHEATH BLIGHT]. Capability of endophytic bacterial, effectivity, and its effect on R. solani. and on maize seedlings growth were investigated from April 2018 to January 2019. Exploration of endophytes bacteria in maize was taken from Banyumas Regency (Sumbang, Kembaran, Baturraden) and Purbalingga Regency (Padamara, Bojongsari, Pratin). Taking plant samples using Purposive Random Sampling and Diagonal Sampling methods. Completely randomized design was used in in vitro test with 16 treatments repeated twice. Completely randomized block design was used in in planta experiment with 5 treatments repeated 5 times. The treatment consisted of control, fungiside (mankozeb), and 2 isolates of endophytes bacteria performing the best in vitro result. Variables observed included characteristics of endophytic bacteria and pathogenic fungi, inhibition diameter, incubation period, disease intensity, incidence of disease, AUDPC, plant height, leaf number, root length, plant fresh weight, canopy fresh weight, and root fresh weight. Resultshowed that the exploration obtained 15 endophytic Bacillus sp. isolates. The PD A.4 and BK A.1 isolates werw able to inhibit the growth of pathogenic fungi in-vitro by 56.93 and 51.5%, respectively. The soaking treatment using BK A1 was able to reduce disease intensity by 59.377%, and AUDPC value 34.19%. Endophytic bacteria influence plant height, plant fresh weight, canopy fresh weight, and fresh weight of roots respectively as 89.17 cm, 126.06 g, 106.67 g and 19.4 g.
Angelita P L, Rini Hermanasari, Yullianida Yullianida, Aris Hairmansis
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 114-118; doi:10.31186/jipi.22.2.114-118

Abstract:
[VARIABILITY STUDIES OF UPLAND RICE LINES ON AN ACIDIC SOIL]. Suscessful upland rice breeding program to produce productive and adaptive to acid soil is dependent upon the extent of genetic variability of the breeding materials. Objectives of this study were to estimate the genetic variability, phenotypic and genotypic coeficient of variations, heritability, genetic advance, and correlation of five traits observed from dari 298 upland rice lines and five checks varieties. A field field experiment arranged in an augmented design was conducted at the Tamanbogo Experimental Station in Lampung 1 MT 2019.. The results of the analysis of variance showed that there was diversity among lines, resulting in differences in appearance on plant height, number of productive tillers, and yields. High heritability, genetic advancement, and high correlation on the number of productive tiller indicate that this character is a selection criteria so that selection can be done in an effort to improve these characters
Edhi Turmudi, Nurga Henni Safitri, Widodo Widodo
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 99-105; doi:10.31186/jipi.22.2.99-105

Abstract:
[GROWTH AND YIELD OF FOUR VARIETIES OF MUNG BEAN (Vigna radiata L.) IN INTERCROPPING SYSTEM WITH VARIOUS CORN PLANT SPACING]. Efforts to increase the productivity of mung beans (Vigna radiata L.) can be done by implementing an intercropping system and using superior varieties. Corn plants need high nitrogen and mung bean plants can fix nitrogen from the free air so that corn plants can take advantage of the excess nitrogen from mung beans. The purpose of this study was to determine the best mung bean varieties in the intercropping system with a various spacing of maize. The research was conducted in October-December 2018, in Pematang Gubernur village, Muara Bangkahulu, Bengkulu. The experiment in this study used a split-plot design with the main plot spacing of maize that was 60 cm x 30 cm, 90 cm x 30 cm, 120 cm x 30 cm, subplots were mung bean varieties (Vima-1, Vima- 2, Vima-3, and Kutilang) with 3 repetitions. Repeated 3 times, then 36 experimental units were obtained. The results showed that the four varieties of mung beans planted intercropping with a various spacing of maize showed different yield responses. Varieties of Vima-1 and Vima-3 gave the highest seed yields at a maize spacing of 60 cm x 30 cm. The Vima-2 variety was at a spacing of 90 cm x 30 cm, while the Kutilang variety was at 120 cm x 30 cm spacing. The four mung bean varieties were suitable for intercropping with maize with a yield/plot (NYi)> 0.5.
Santoso Santoso, Anggiani Nasution, Nani Yunani
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 119-128; doi:10.31186/jipi.22.2.119-128

Abstract:
[DIVERSITY AND THE SOURCE OF RESISTANCE GENE OF LOCAL RICE VARIETIES ON THE PATHOGENIC OF Pyricularia grisea CAUSE OF BLAST DISEASE]. Local rice varieties are known to have resistance or source of genes to pests even though their productivity yield is low. The pathogen of Pyricularia grisea is a cause of blast disease, which is one of the obstacles in rice production. The research aims to characterize the resistance of local rice varieties to the pathogen of P. grisea and to evaluate the virulence level of P. grisea pathogens against local rice varieties. A total of 100 local rice varieties and check varieties are susceptible and resistant namely Kencana Bali and Situ Patenggang tested their resistance to 4 dominant pathogenic of P. grisea i.e. races 033, 073, 133 and 173. Inoculation was carried out on stages 4-5 leaves or 18-21 days after seedling in a green house. The results showed a high genetic diversity of local rice varieties against pathogenic races 033, 073, 133 and 173. Based on the response of local rice varieties resistance i.e. moderately resistant (MR), resistant (R) and susceptible (S) to pathogenic races 033, 073 , 133 and 173 obtained 45 resistance response patterns. Cere Bereum varieties which are local rice varieties from West Java and Situ Patenggang resistant check varieties have a resistant response to 4 P. grisea pathogenic races used. A number of local rice varieties also show a resistant and moderately resistant response to the four pathogenic races used include Siam 11, Pare Siriendah, Menyan, Cere Manggu and Enud-Rawa Bogo. Local rice varieties Djedah and Padi Hitam (2) are local rice varieties that have a specific response of resistant or moderately resistant to race 173. Race 133 and 173 have higher virulence rates than those of races 033 and 073 on local rice varieties. The results of this study indicate that there is a great potential for the utilization of local rice varieties, as a source of resistance genes for blast disease for the assembly of rice varieties that are resistant to blast disease.
Robi Candra, Sumardi Sumardi, Hermansyah Hermansyah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 136-143; doi:10.31186/jipi.22.2.136-143

Abstract:
[GROWTH AND YIELD OF FOUR VARIETIES OF MUNG BEAN (Vigna radiata L.) PLANT ON DOSING OF CHICKEN MANURE FERTILIZER IN ULTISOL]. Ultisols generally have less favorable physical, chemical, and biological properties. Chicken manure is believed to be able to improve soil structure, increase water holding capacity, increase soil pH, increase cation exchange capacity, increase soil biological activity, and facilitate root penetration. This study aims to determine the optimum dose of chicken manure in increasing the growth and yield of four mung bean varieties in Ultisol. This research was conducted using a split-plot design. The doses of chicken manure (0 tons/ha, 10 tons/ha, 20 tons/ha, and 30 tons/ha) were placed in the main plots and mung bean varieties (Vima-1, Vima-2, Kutilang, and Murai) as children. plots with experimental plot units measuring 1 m x 2 m. This study aims to obtain the optimum dose of chicken manure on four varieties of mung bean plants and to find the varieties that have the best growth and yield of green bean plants in Ultisol. The results showed that the highest weight of 100 seeds was obtained from the Kutilang variety which was given chicken manure of 21.34 tons/ha with a maximum weight of 100 seeds of 8.82 g. The highest yield of seed/plant weight was obtained from the application of chicken manure 19.61 tons/ha with a yield of 15.43 g. Kutilang variety is the best variety compared to other varieties, with yields of seed weight/plant of 12 g.
Yudhi Harini Bertham, Abimanyu Dipo Nusantara, Bambang Gonggo Murcitro, Zainal Arifin
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 79-84; doi:10.31186/jipi.22.2.79-84

Abstract:
[CHANGE IN SOIL CHARATERISTICS AND PERFORMANCE OF UPLAND RICE VARIETIES IN COASTAL AREA AS AMENDED WITH BIOFERTILIZER AND BIOCOMPOST]. Dryland in the coastal area has good potential for the cultivation of upland rice to reach food self-sufficiency and the development of future agriculture. Low fertility of the land the area can be overcome by using appropriate technology such as the use of superior varieties, bio-fertilizers, and bio compost. This study aimeds to (1) determine chemical and biological properties of coastal land to improve the growth of upland rice (2) find out the growth of upland rice in the coastal area using low input technology and (3) obtain upland rice varieties with high adaptability to a coastal area environment. The experimental design used was a split-plot design with the main plot of 3 upland rice varieties, namely Inpago 10, Serantan, and Local Variety, while the subplots are were fertilizer inputs namely [double inoculant P solubilized microbial p (pf) + K solubilized microbially + N fixation microbial N], [double inoculant P solubilized microbial (fma) + K solubilized microbially + N fixation micarobia], [biocompost at a dose of 10 tons/ha], and [inorganic fertilizer recommended by BPTP ie 200 kg Urea/ha, 100 kg SP36/ha, 100 kg KCl/ha]. The results showed that the coastal area has the potential for the development of upland rice cultivation. Also, the double inoculants of biological fertilizers were able to increase plant nutrient uptake, soil biological characteristics, and the growth of upland rice as compared to controls. Specifically, the best treatment is produced by application of [double inoculant microbial solvent p (pf) + microbial solvent K + microbial N fixation] combined with upland rice Inpago variety 10.
Bilman Wilman Simanihuruk, Yanti Oktavia Lumbantoruan, Herry Gusmara
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 85-92; doi:10.31186/jipi.22.2.85-92

Abstract:
[APPLICATION OF PALM OIL SLUDGE DOSE AND KCl FERTILIZER AGAINST GROWTH AND YIELD OF CORN (Zea mays L) ON ULTISOLS IN BENGKULU]. This study aims to determine the dose of palm oil sludge (POS) and the optimal dose of KCl fertilizer to the growth and yield of corn. The study was conducted from June to October 2018. The design used is Randomized Completely Block Design (RCBD) which is arranged in factorial with two treatment factors. The first factor is the POS consisting of 3 levels: 0 tons/ha, 10 tons/ha, and 20 tons/ha. The second factor is the dose of KCl fertilizer consisting of 3 levels: 0 kg/ha, 100 kg/ha, and 200 kg/ha. The results showed no real influence on the combination of POS and KCl fertilizer treatment on the growth and yield of corn. The 10 tons/ha POS dose delivers the best results on the entire observation variable. KCl fertilizer indicates a different effect is not noticeable on all observed variables.
Agus Kardinan, Molide Rizal, Paramita Maris
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 93-98; doi:10.31186/jipi.22.2.93-98

Abstract:
[THE INFLUENCE OF BOTANICAL INSECTICIDES BASED ON CROTON OIL AND DERRIS ROOT AGAINST BROWN PLANTHOPPER]. Brown planthopper (BPH) (Nilaparvata lugens Stall) is a serious pest in rice. Using synthetic insecticide to control BPH is harmful for human health and can caused environmental pollution. The objective of this research is to find out ecofriendly insecticide to control BPH. Research has been conducted at Entomological laboratory, Indonesian Spice and Medicinal Crops Research Institute (ISMECRI), Bogor. It was designed with CRD, 16 treatments and 3 replications. Treatments consisted of botanical insecticides based on Croton tiglium and Derris elliptica. Each material was extracted by water, methanol, and xylene, and then tested by individually and combination, so there were 15 formulas and 1 control treatment (water). Third nymph BPH and IR64 rice variety were used in this research. Research was done in two methods, i.e. contact application and residual application. The result shows that there are 11 formulas which are prospective to be further developed i.e aqueous extraction (6 formulas) and combination extraction (aqueous with xylene and methanol (5 formulas). The aqueous extraction maybe the most prospective formulation since the technique could easily be adopted by farmers. Botanical pesticide based on Croton tiglium and Derris elliptica are very promising, therefore the research should be continued to find out the best formula of botanical insecticides for controlling BPH).
David Khairullah Hadi, Reny Herawati, Widodo Widodo, Mukhtasar Mukhtasar, Helfi Eka Saputra, Eko Suprijono
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 106-113; doi:10.31186/jipi.22.2.106-113

Abstract:
[RESPONSE OF GROWTH AND YIELD OF FIVE RICE HYBRID GENOTYPE ON THE ORGANIC FERTILIZER OF PALM OIL BUNCHES ON ULTISOL]. Oil Palm Bunches (OPB) are solid waste potential as organic fertilizer to improve soil physical, biological and chemical properties, especially on ultisol soils for rice development. This research was conducted in August - November 2019 in Padang Harapan, Bengkulu City. The materials used were F1 rice seeds, OPB organic fertilizer. The experimental design was a factorial Randomized Completely Block Design (RCBD) with 2 factors. The first factor was 5 hybrid genotypes (F1), namely, Kuning x Inpago5, Kuning x Inpago9, Kuning x Inpago6, Arang x Inpago8, and Kuning x Salumpikit. The second factor was the dosage of OPB, namely 0 (control), 10 tonnes/ha, 15 tonnes/ha, and 20 tonnes/ha, the experiment was repeated 3 times. The variables observed were plant height, number of productive tillers, flowering age, harvest age, the total number of fill grains, number of filled grains, number of empty grains, 1000 grain weight, and grain weight/hill. The results showed that there was an interaction between genotype and OPB on the number of tillers. The interaction between the Kuning x Salumpikit genotypes and 10 tonnes/ha of organic fertilizer produced the largest number of tillers. Genotype G3(Kuning x Inpago6) produced the best rice growth and yield. In this study, the optimum point for OPB fertilization on growth and yield of the five genotypes tested had not been obtained.
Ayu Kurnia Illahi
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22, pp 129-135; doi:10.31186/jipi.22.2.129-135

Abstract:
[PHENOTYPIC VARIABILITY AND MORPHOLOGICAL SIMILARITY OF JOB’S TEARS (Coix lacryma-jobi L.) IN LIMA PULUH KOTA REGENCY]. Job’s tears (Coix lacryma-jobi L) Has been long known as alternatif food crop and spread over the West Sumatera Province. This study aims to determine the similarity of job’s tears based on morphological characters. This research was conducted in eight sub districts in Lima Puluh Kota regency. The accessions were observed on the basis of purposive sampling method. Data were collected for 29 morphological characteristics and subjected to the similarity analysis and cluster analysis using NtSys Ver 2.02i. From the analysis of similarity, job’s tears has a similarity coefficient ranging from 0.07 to 0.63 and shows a distant level of similarity to job’s tears even though they are located close to each other, so that the level of similarity of 74 accessions varies and spreads irregularly.
Noni Fatmala, Hermansyah Hermansyah, Marlin Marlin
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.52-57

The publisher has not yet granted permission to display this abstract.
Eka Nurjanah, Sumardi Sumardi, Prasetyo Prasetyo
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.23-30

The publisher has not yet granted permission to display this abstract.
Rika Aprilia Fajar Riningrum, Nadrawati Nadrawati, Edhie Turmudi
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.9-15

The publisher has not yet granted permission to display this abstract.
Hellianti Pennita, Catur Herison, Marwanto Marwanto, Rustikawati Rustikawati
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.1-8

The publisher has not yet granted permission to display this abstract.
Christiawan Poniman, Tri Sunardi, Hesti Pujiwati
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.38-44

The publisher has not yet granted permission to display this abstract.
Detri Saputra, Entang Inoriah Sukarjo, Masdar Masdar
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.31-37

The publisher has not yet granted permission to display this abstract.
Eisal Vepin Nainggolan, Yudhi Harini Bertham, Sigit Sudjatmiko
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.58-63

The publisher has not yet granted permission to display this abstract.
Elpiana Purba, Alnopri Alnopri, Bandi Hermawn, Helfi Eka Saputra
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.64-69

The publisher has not yet granted permission to display this abstract.
Dina Yulianti Sisca Vera, Edhi Turmudi, Eko Suprijono
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 22; doi:10.31186/jipi.22.1.16-22

The publisher has not yet granted permission to display this abstract.
Arif Nugroho, , Bilman Wilman Simanihuruk
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 91-98; doi:10.31186/jipi.21.2.91-98

Abstract:
[THE IMPACT OF PALM OIL SLUDGE RESIDUES AND DOLOMITE RESIDUES ON GROWTH AND YIELD OF PEANUT (Arachis hypogaea L.) IN ULTISOL]. This study aims to determine the best interaction between palm oil sludge (POS) residues and dolomite residues, determine the best POS residue, and determine the best dolomite residue in the growth and yield of peanut plants. This research was conducted from March 2018 to June 2018, the design used was a Complete Randomized Block Design (RCBD) with two factors. The first factor is POS residue with 3 levels, 0, 10, and 20 tons/ha. The second factor is dolomite residue with 4 levels, namely 0, 2, 4, and 6 tons/ha. The results showed that the best treatment combination was obtained from oil POS residue of 10 tons/ha and dolomite residue of 2 tons/ha which produced the highest total root nodule weights of 0.2417 g. POS residue of 20 tons/ha gives the highest yield on the growth component, which is an average plant height of 16.72 cm. POS residue of 10 tons/ha gave the highest yield on the growth component, namely dry stover weight of an average of 9.57 g, as well as the yield component of 45.20 total pods, 32.84 pods, total pod weight 43.47 g, and the weight of pith pods weighing 36.60 g. The highest total dry pod weight was 2.71 tons/ha. Dolomite residue gave a higher yield on all growth variables and observed results, with the highest total dry pod weight being 2.68 tons/ha.
Desi Lestari, , Dotti Suryati
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 82-90; doi:10.31186/jipi.21.2.82-90

Abstract:
[EFFICIENCY OF LAND USE IN MULTIPLE CROPPING SYSTEM WITH VARIOUS CORN PLANT AND MUNG BEAN VARIETIES]. This study aims to find out the precise planting distance of corn with mung bean varieties that are suitable for increasing the efficiency of land use in terms of ecology and agronomy. Research has been carried out in the agricultural land in September 2018-January 2019 using a split-plot design. The main plot of planting spacing of corn which is 60 cm x 30 cm, 90 cm x 30 cm, and 120 cm x 30 cm, subplots ie mung bean varieties (Kutilang, Vima-1, Vima-2, Vima-3). As a comparison of intercropping systems, monocultures are cultivated by corn and mung beans. The results showed that in general intercropping of maize and mung bean NKL> 1, ecologically and agronomically efficient. However, this efficient level can be distinguished based on the spacing of corn and mung bean varieties. The best ecological efficiency at 120 cm x 30 cm corn spacing, while the best agronomic efficiency in Virna-3 mung bean varieties.
Andi Kurnia Agung, Teguh Adiprasetyo Adiprasetyo, Hermansyah Hermansyah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 75-81; doi:10.31186/jipi.21.2.75-81

Abstract:
[THE USE OF OIL PALM EMPTY-FRUIT-BUNCHES COMPOST AS THE SUBTITUTE FOR NPK FERTILIZER IN THE OIL PALM PRE-NURSERY]. Compost of oil palm empty fruit bunches (OPEFB) is rich in nutriets needed to support the plant growth and offers as the substitute for chemical fertilizers. The purpose of this study was to determine the rates OPEFB compost and NPK fertilizer applications on the best suited for the growth of oil palm seedlings during pre-nursery. The OPEFB compost at 50, 100, and 150 g/pot was applied in factorial combination with with NPK at 0.0, 2.5, and 5.0 g/pot. Data were collected for seedling height, stem diameter, leaf number and leaves greenness. Higher leaf number was observed when OPEFB compost applied at 100 or 150 g/plot with or without additional NPK. Seedling height, stem diameter, and leaves greenness were increased with the application of OPEFB compost at 50 g/pot but no further increase with the additional rates. Additional application of NPK only increased the leaf greenness.
Andreas Junico Marulitua Situmorang, Bandi Hermawan, Hesti Pujiwati
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 68-74; doi:10.31186/jipi.21.2.68-74

Abstract:
[IMPACT OF THE TILLAGE SYSTEM AND OIL PALM EMPTY FRUIT BUNCH MULCH ON GROWTH, YIELD OF SWEET CORN (Zea mays saccharata) AND GROUNDWATER SYSTEM]. This study aims to determine the impact of land management and the use of oil palm empty fruit bunches (TKKS) mulch. This research was conducted from August to October 2018, arranged in a split plot design with two factors. As a first factor, land management consists of unprocessed, plowed, and plowed and harrowed. The treatment of oil palm empty fruit bunches mulch as the second factor consisted of no mulch, 9 tonnes/ha of mulch, 12 tonnes/ha of mulch, and 15 tonnes/ha of mulch. Plant variables observed consisted of plant height, stem diameter, number of leaves, fresh plant weight, plant dry, ear weight, ear length, ear diameter. Soil variables observed were the redistribution of groundwater and infiltration. The results showed no significant interaction between the tillage system and the application of oil palm empty fruit bunch mulch on all observed variables. Treatment without tillage or mulch dose of 12 tons/ha can provide growth and yield of sweet corn plants better than other treatments. The highest water content and infiltration rate were obtained from the dosage of oil palm empty bunches mulch 15 tons/ha. Soil cultivation by plowing and harrowing produces the highest infiltration rate compared to lower tillage intensities. About 18% to 42% of the diversity of growth and yield of sweet corn plants have a significant relationship with the diversity of groundwater.
Yulie Oktavia, Yartiwi Yartiwi, Ahmad Damiri
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 103-107; doi:10.31186/jipi.21.2.103-107

Abstract:
[PERFORMANCE OF GROWTH AND ANALYSIS OF FARM BUSINESS THREE SHALLOT VARIETIES : CASE STUDY IN SELUPU REJANG REJANG LEBONG REGENCY PROVINSI BENGKULU]. The results of shallots from one region to another in Indonesia are very varied, which is partly due to differences in varieties cultivated. However, high productivity does not necessarily lead to high income. The research aims to compare the productivity and farming of three varieties of shallots, namely Maja Cipanas, Batu Ijo, and Selupu Merah. This research was conducted in June - July 2018 in Air Duku Village, Selupu Rejang District, Rejang Lebong Regency. Data collected includes agronomic performance (plant height, wet tuber/clump weight, number of tubers/clump, tuber weight, and tuber diameter) and farm economic performance (input, output, and income costs). The results showed that the wet tuber productivity of the greatest Selupu Merah varieties compared to Batu Ijo and Maja Cipanas, respectively, amounted to 24.47 tons/ha, 22.30 tons/ha, and 14.07 tons/ha. Average plant height, wet tuber weight per clump, weight per tuber, and tuber productivity of Selupu Merah varieties showed the highest results and were significantly different from Batu Ijo and Maja Cipanas. The exciting thing from this research; although Selupu Merah variety shows agronomic superiority, Maja Cipanas variety is more profitable to be cultivated. The value of the RC Ratio of Maja Cipanas variety is 2.81, with a total income of Rp 330,645,000 /ha/planting season. This value is higher than that of Batu Ijo and Selupu Merah varieties, with RC Ratio values of 1.85 and 1.49, respectively, and total income of Rp 379,100,000 and 305,875,000 /ha/planting season. This research shows that although crop productivity is higher, it is not necessarily more economically feasible.
Muhammad Iqbal, , Atra Romeida
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 108-114; doi:10.31186/jipi.21.2.108-114

Abstract:
[GROWTH AND YIELD OF MELON PLANT (Cucumis melo L.) IN DIFFERENT COMPOSITION OF PLANT MEDIA AND DIFFERENT FREQUENCY OF NPK APPLICATION]. This study aims to determine the best combination of planting media composition and frequency of NPK fertilization on the growth and yield of melon plants. The research was conducted in October 2018 - January 2019 on the land located in Bentiring, Muara Bangkahulu District, Bengkulu City. The design used in this study was a Completely Randomized Design (CRD) consisting of two factors and three replications. The first factor was the composition of the media for plant growth, which consists of three different media composition, namely: sand: soil: manure (30%: 50%: 20%), sand: soil: manure (10%: 60%: 30%), and sand: soil: manure (20%: 70%: 10%). The second factor is the frequency of NPK fertilization consisting of four types of fertilization, namely: 1 time NPK fertilization during planting, 2 times NPK fertilization during planting and 10 days after planting (dap), 3 times NPK fertilization during planting, 10 dap and 20 dap, and 4 times NPK fertilizing during planting, 10 dap, 20 dap and 30 dap. The dose given is 15 g/plant (equivalent to 800 kg/ha) and NPK fertilizer given in the form of compound fertilizer N: P: K 16:16:16. The results showed that the best composition of the planting media was found in the treatment of sand media: soil: manure (10%: 60%: 30%). The best fertilizing frequency was found in the treatment of NPK fertilizing 4 times during planting, 10 dap, 10 dap, 30 dap, and the combination of both produces the most substantial plant length, weight, and fruit circumference
Cintya Ramadhani, , Bambang Gonggo Murcitro
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 121-128; doi:10.31186/jipi.21.2.121-128

Abstract:
[APLICATION OF TWO AMELIORANT TYPES OF OKRA PLANT PERFORMANCE (Abelmoschus esculentus) IN ULTISOL]. This study aims to determine the dosage of dolomite lime and the type of organic fertilizer that can produce the highest performance of okra plants. This research is an experiment that was compiled based on factorial CRD. The first factor is dolomite dosage, which consists of three levels; 1.11 tons/ha, 1.76 tons/ha, and 2.40 tons/ha. The second factor is the type of organic fertilizer consisting of three types; chicken manure, cow manure, and palm oil solid organic fertilizer. The results showed that the dolomite dose of 2.4 tons/ha produced the highest number of fruits/plants (5.8 fruits) and the heaviest fruit/plant weights (82.1 g). Chicken manure and cow manure produce the highest plant height performance okra (29.8 cm - 31.6 cm), the largest stem diameter (72.8 mm - 73.8 mm), the highest number of branches (3 stems), the number most fruits / plants (5 - 7) and the largest fruit / plant weight (72.4 g - 81.4 g). The interaction between dolomite dosage and organic fertilizer did not significantly affect the performance of okra plants.
, Yenny Sariasih, Priyatiningsih Priyatiningsih, Fausiah T. Ladja
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 99-102; doi:10.31186/jipi.21.2.99-102

Abstract:
[DETECTION OF TUNGRO VIRUS ON RICE IN BENGKULU]. Several types of viruses have been reported to infect rice plants in Indonesia, including tungro, dwarf grass, and empty dwarfs. The spread of tungro in Indonesia in the beginning was only limited to certain regions in South Sulawesi, South Kalimantan, West Nusa Tenggara and North Sulawesi, but later it expanded to East Java, Central Java and Yogyakarta. In this study a tungro disease survey was conducted in several areas in Bengkulu Province. Virus detection is done by Loop-medated isothermal amplification (LAMP). Observations in the field showed that there were typical symptoms of tungro infection in rice plants, namely orange leaves starting from leaves to 2 and 3, little tillers, stunted plant growth. The results of detection with LampPCR showed rice samples from the district Pondok Kelapa Kab Bengkulu Tengah is positively infected with tungro virus.
Desy Aryani, Uswatun Nurjannah, Hasanudin Hasanudin
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 115-120; doi:10.31186/jipi.21.2.115-120

Abstract:
[THE USE OF PAITAN BIOMASS (Tithonia diversifolia) (Hemsley) A. Gray AS A FERTILIZER IN INCREASING PEANUT YIELD]. Peanuts are one of the food crops having high economic value due to their nutritional content, especially high protein and fat. Peanut crop production has decreased due to infertile land with poor in nutrients. Efforts to increase peanut production is by including organic paitan (T. diversifolia) provision. This study aims to obtain the optimum dose of T. diversifolia compost on the yield of peanuts. This research was carried out in Pekik Nyaring Village, Bengkulu, with a height of ± 25 m above sea level, from February to April 2018. The design used was a complete randomized block design with a single factor consisting of 6 levels of treatment with four replications. Factor dosage of paitan compost fertilizer (T. diversifolia) is 0 tons/hectares, 5 tons/hectares, 10 tons/hectares, 15 tons/hectares, 20 tons/hectares, and 25 tons/hectares. Data were analyzed using analysis of variance at a 5% level. The results showed that the optimum dose of 15.5 tons/hectares produced 6.54 branches. The dosage of T. diversifolia compost 25 tons/hectares produced the highest number of pithed pods (36.08 pieces), the heaviest pith weighted pods (111.58 g), and the heaviest seed weight (87.06 g).
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 15-21; doi:10.31186/jipi.21.1.15-21

Abstract:
[EFFECT OF WEED COMPOST AND SYNTHETIC FERTILIZER DOSAGE ON TOMATO GROWTH AND YIELD (Lycopersicum esculentum Mill.)]. The growth and yield of tomato plants are influenced by fertilizer and nutrient content in the soil. This study aims to investigate the effect of a combination of synthetic fertilizer and weed compost on the growth and yield of tomato plants. The study was conducted in November 2016 through June 2017 in Agronomy, Faculty of Agriculture, University of Bengkulu, at an altitude of ± 10 m above sea level using a Completely Randomized Design (CRD). The treatments consisted of synthetic fertilizer at a rate of 180 kg/ha N, 150 kg/ha P2O5 and 100 kg/ha K2O (control), grass compost 30 , 40 and 50 tons/ha, 50% control + grass compost 15 tons/ha, 50% control + 20 tons/ha grass compost and 50% control + 25 tons/ha grass compost. The results revealed that the vegetative growth of tomato plants fertilized with grass compost 30 tons/ha and a combination of grass compost + 50% control did not differ from control treatment. Tomato yield fertilized with grass compost 30 tons/ha and a combination of 50% control + 15 tons/ha grass compost was higher than the control treatment. Therefore, 15 tons/ha of grass compost can reduce the dose of synthetic fertilizer by 50%.
Lia Resti Utami, , Bambang Sulistyo
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 32-36; doi:10.31186/jipi.21.1.32-36

Abstract:
[VEGETATIVE GROWTH OF GRAFTING SEEDLINGS OF GERGA ORANGE IN DIFFERENT CONCENTRATIONS OF LIQUID ORGANIC FERTILIZER]. This study aims to examine explain the effect of gamal leaf liquid organic fertilizer dosage, the way of application of gamal leaf liquid organic fertilizer, and the interaction between treatments on the growth of citrus plants. This research was conducted from August to December 2017 at the Greenhouse of the Faculty of Agriculture, University of Bengkulu. This research was carried out using a Randomized Complete Block Design using 2 factors. The first factor is the way the application of gamal leaf liquid organic fertilizer is sprayed on the leaves and watered onto the ground. The second factor is the concentration of gamal leaf liquid organic fertilizer which consists of control, 25%, 50%, 75% and 100%. The results showed that application of liquid organic fertilizer only gave effect to the number of branches. The 50% gamal leaf liquid organic fertilizer concentration was able to increase the number of branches of gerga orange seedlings by an average of 1.04 branches.
Daniel Malintang Siagian, , Herry Gusmara
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 27-31; doi:10.31186/jipi.21.1.27-31

Abstract:
[TIME OF GRANTING PALM OIL AND NPK DOSAGE IN GROWTH AND RESULTS OF SWEET CORN (Zea mays saccharata Sturt.) IN ULTISOL]. The objectives of this study were to obtain timing of sludge, NPK dosage and best interaction between NPK fertilizer and timing of sludge for growth and yield of sweet corn. The study was conducted from June to September 2017 at Jl. Al-Hikmah Mosque, Kandang Limun Village, Muara Bangkahulu Subdistrict, Bengkulu City with Ultisol soil type and altitude of 15 m above sea level. The study was arranged in Split Plot Design with two treatment factors and three replications. The first factor as the main plot was the time of giving of sludge 0, 2, and 4 weeks before planting, second factor as subplot was the application of each NPK dosage consisting of 3 treatment levels: 150 kg/ha, 225 kg/ha, and 300 kg/ha. The timing of sludge and NPK doses gave no significant effect on the growth and yield of sweet corn. The timing of sludge two weeks before planting gives better results on the number of leaves. NPK was giving no significant effect on all observed variables.
, M. Chozin, Hermansyah Hermansyah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 49-54; doi:10.31186/jipi.21.1.49-54

Abstract:
[GROWTH AND YIELD OF F4 SWAMP RICE LINES ON LINE SWAMP]. Growth and yield of swamp rice are depending on the plant ability to adapt in swampy agro-ecosystem which characterized by several limiting factors. This study was addressed to evaluate the growth and yield characteristics of six lines of swamp rice bred for the development of high-yielding rice varieties best suited for swamp land production. Evaluation was conducted in a pot experiment using UBPR2, UBPR3,UBPR6, UBPR7, UBPR9, and UBPR10 as planting materials. These lines were the F4 generation derived from crosses involving local Bengkulu swamp rice varieties. Observations were made on 13 plant characteristics, dry matter accumulation, leaf area ratio, specific leaf weight, net assimilation rate, plant height, productive tiller number, heading date, maturity date, panicle length, grain number per panicle, percent of filled grain, and plant yield (the grain weight per clump). The collected data were subjected to analysis of variance and least significant difference test at 5% level. Results indicated that all lines physiologically exhibited similar growth patterns, excepting the capability of accumulating dry matter at 40 dap. In this case, UBPR6 produced the highest dry matter accumulation (24.34 g). Based on the morphological performances, significant variations among the lines were observed on most of the observed characteristics, except on productive tiller number and panicle length UBPR10 was the line produced the tallest plant stature (160.72 cm), UBPR2 was the earliest flowering and maturing line (76,33 and 111 dap), whereas UBPR6 was the line produced the highest grain number per panicle (212,2), percent of filled grain (95%), and plant yield (82.50 g per clump).
Minal Faizin, Nadrawati Nadrawati,
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 55-61; doi:10.31186/jipi.21.1.55-61

Abstract:
[THE INCIDENCE OF POD-BORER, Maruca testulalis Geyer (Lepidoptera: Pyralidae) IN EIGHT MUNG BEAN VARIETIES (Vigna radiata L.) AND ITS EFFECT ON YIELD]. Mung beans are an essential food crop in Indonesia, whose production is still increasing to meet domestic needs. However, the high attack of plant pests Maruca testulalis Geyer (Lepidoptera: Pyralidae) is one of the leading causes of the low production of green beans. The use of superior varieties is one solution to controlling these pests. This study was conducted to test seven superior varieties of green beans, namely Vima 1, Vima 2, Vima 3, Murai, Kenari, Kutilang and Seriti and one local variety against M. testulalis. The study used a completely randomized block design and was repeated three times. The results showed that the mungbean varieties Vima 1, Vima 2, and Vima 3 had M. testulalis attack with the lowest level of seed damage in sequence, namely 5.84%, 7.94%, and 6.39%. Even though the percentage of pod borers attack did not significantly affect the growth of all Balitkabi superior varieties and one local variety of mungbean planted, the Kutilang variety was the highest yield with seed yield rates that were as low as other low-attack varieties.
Eky Santo, , Entang Inoriah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 1-8; doi:10.31186/jipi.21.1.1-8

Abstract:
[THE EFFECTIVENESS Jatropha curcas (L.) LEAF EXTRACTS IN INHIBIT ROOT-KNOT NEMATODE (Meloidogyne spp.) INJURIES ON TOMATO]. One of the main problems in tomato cultivation is the attack of root purse nematodes (Meloidogyne spp.). Some methods of controlling Meloidogyne spp. which can be done including using plants as vegetable nematicides. This study aims to get the concentration of Jatropha leaf extract which is effective in inhibiting the Meloidogyne spp attack on tomato plants. This study used 48 plants, 24 plants for observation 35 days after planting and 24 plants for observation until the age of 77 days after planting. This study used a Completely Randomized Design (CRD) with the treatment of Jatropha leaf extract concentrations (0%, 10%, 20%, 30%, 40%, 50%), and repeated four times. The results showed Jatropha curcas extract in inhibiting the attack of root purse nematodes (Meloidogyne spp.) can maintain plant height, fruit number, fruit weight, and plant stover wet weight 35 days after planting, but no significant effect on stover wet weight plants 77 days after planting and dry weight of plant stover 35 days after planting and 77 days after planting. The concentration of Jatropha leaf extract tends to increase the concentration, the smaller the rate of infection and the population of Meloidogyne spp on tomato plants. The concentration of Jatropha leaf extract 35% - 45% is the optimum concentration in inhibiting Meloidogyne spp. on tomato plants.
, Azis Febrianto, Faiz Barchia
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 22-26; doi:10.31186/jipi.21.1.22-26

Abstract:
[GROWTH OF DRAGON FRUIT (Hylocereus constaricensis) STEM CUTTINGS AS AFFECTED BY CONCENTRATIONS AND DIPPING TIMES OF COCONUT WATER]. Dragon fruits (Hylocereus constaricensis) is commonly propagated vegetatively by using stem cutting. In this respect the use of natural plant growth regulator, such as coconut water, to promote the growth of the cuttings is very important. The objectives of this experiment were to evaluate water coconut concentration, dipping time of stem cutting in the coconut water, and the combination of both to promote the growth of dragon fruit cuttings. The experiment was arranged in Randomized Complete Block Design (2 factors, 5 replications). The first factor was the concentration of coconut water, consisting of 5 levels: 20, 40, 60, 80, and 100%. The second factor was dipping time of cutting in the coconut water, consisting of 4 levels: 2, 4, 6, and 8 minutes. The results showed that the increasing coconut water concentration had increased the shoot growth in a liner fashion. A similar trend was also observed for coconut water dipping time. The highest shoot growth was found on 60 % coconut water.
, Yudhy Harini Bertham, Ahmad Junedi, Hesti Pujiwati, Hartal Hartal
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 37-43; doi:10.31186/jipi.21.1.37-43

Abstract:
[UTILIZATION OF MICROBE TO INCREASE GROWTH AND YIELDS OF SOYBEAN IN COASTAL LAND. This study aims to obtain the right combination of varieties and biofertilizers to increase soybean productivity on Bengkulu coastal land. The research was conducted from March to July 2017, located in Beringin Raya Village, Muara Bangkahulu Sub-District, Bengkulu. The study was conducted with a split-plot design which was repeated three times. The main plot is two soybean varieties (Grobogan and Wilis). The subplots are two types of biological fertilizers, arbuscular mycorrhizal fungi, and phosphate solvent fungi. The results showed that the results of the seed weight of the Grobogan variety (equivalent to 3.38 tons/ha) were significantly higher than the Wilis variety (equivalent to 2.72 tons/ha). However, the Wilis variety showed an increase in seed weight (equivalent to 1.12 tons/ha) higher than the Grobogan variety (equivalent to 0.61 tons/ha) according to the description of each variety. The combination of arbuscular mycorrhizal fungi and phosphate solvent fungi showed superior performance than arbuscular mycorrhizal fungi fertilizer or phosphate solvent fungi. The interaction of Grobogan varieties with a combination of arbuscular mycorrhizal fungi and phosphate solvent fungi produced the highest seed weight (equivalent to 3.52 tons/ha) which was statistically similar to the interaction of Grobogan varieties and arbuscular mycorrhizal fungi (equivalent to 3.45 tons/ha). The economics of resources using arbuscular mycorrhizal fungi are not required to be combined with phosphate solvent fungi.
Ariya Listari, , Sumardi Sumardi, Widodo Widodo, Djamilah Djamilah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 44-48; doi:10.31186/jipi.21.1.44-48

Abstract:
[THE EFFECT OF GOAT MANURES AND NPK 16:16:16 FERTILIZER ON THE GROWTH OF SEEDLESS GUAVA CROPS AND QUALITY OF ITS FRUIT (Psidium guajava L) AT RAINY SEASONS OF INDONESIA]. Guava var. Crystal, known as seedless guava, is one of the most popular guava in Indonesia. Compated to other guavas, seedless guava has softer texture, tastes sweeter, and has less seeds. This experiment was carried out from September 2017 to February 2018 at Harapan Makmur village, Pondok Kubang regency, and Central Bengkulu district. The objective of this experiment was to evaluate the effect of goat manures and NPK 16:16:16 fertilizers on the growth of guava crops and the quality of its fruits. The experiment was arranged in randomized complete block design (2 factors, 5 replications). The first factor tested was the dose of goat manures, consisting of 3 levels: 0, 9, and 18 kg/plant. The second factor tested was the dose of NPK 16:16:16 fertilizers, consisting of 3 levels: 0, 0,25, and 0.5 kg/plant. The results showed that goat manures significantly affected the diameter and number of branches. In addition, the dose of NPK significantly affected the diameter of branches, degree of leaf greenness, number of flower, and number of aborted flowers. Finally, the interaction between goat manures and NPK manures did not significantly affect all variables measured, except for leaf areas.
, Taufik Hidayat
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 21, pp 9-14; doi:10.31186/jipi.21.1.9-14

Abstract:
[PERFORMANCE OF SCAB DISEASES ATTACKS IN ORANGE KALAMANSI AND ITS EFFECT ON THE QUALITY OF FRUIT] The need for fresh orange kalamansi raw materials is increasing along with the market demand for syrup. Pests and diseases are one of the obstacles in fulfilling this, namely the attack of citrus scabies. This study was to study the development of scurvy attacks and their effects on the quality of Kalamansi citrus fruits. The research was carried out by observation method in the Kalamansi orange orchard and in the postharvest laboratory. Data from observations and measurements were analyzed by descriptive statistics and analysis of variants (ANOVA) to see the effect of scurvy attacks on the physical and chemical quality of Kalamansi oranges. The results showed that scurvy began to attack the fruitset phase. The intensity of the disease attack at the beginning of the observation reached 11.06% and increased to 58.18% with an average rate of attack intensity of 14.54%. The attack of scurvy has a significant effect on the physical and chemical quality of the fruit, namely fruit weight, fruit diameter, juice volume and dissolved solids levels.
Johannes Simbolon, , Bambang Gonggo Murcitro, Herry Gusmara, Eko Suprijono
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 51-59; doi:10.31186/jipi.20.2.51-59

Abstract:
[EFFECTS OF PALM OIL SLUDGE SUBTITUTION FOR SYNTHETIC N FERTILIZER ON GROWTH AND YIELD OF SWEET CORN]. Palm oil sludge (POS) contains high concentrations of organic nitrogen dan its can serve as an alternative for synthetic nitrogen fertilizer. Objective of this study was to compare the growth and yield of sweet corn as amended with different compositions of synthetic N fertilizer and palm oil sludge. Six compositions, each containing 138 kg N/ha were assigned as the treatment and arranged in a randomized complete block design with three replications. These were 100% synthetic fertilizer, 80% synthetic fertilizer + 20% POS, 60% synthetic fertilizer + 40% POS, 40% synthetic fertilizer + 60% POS, 20% synthetic fertilizer + 80% POS, and 100% POS. The results of this study indicated that the plot amended with 60% synthetic fertilizer + 40% POS produced the highest plant stature (176.4 cm), stem diameter (2.40 cm), leaf area (8712.82 cm2 ), plant fresh weight (375.19 g), plant dry weight (136.68 g), and husked ear length (17.93 cm). However, the highest observed husked ear yield was only about 61.6 % the yield potential of the sweet corn variety.
Halasan Halasan, , Hasanudin Hasanudin, Riwandi Riwandi
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 33-39; doi:10.31186/jipi.20.2.33-39

Abstract:
[CHANGE IN SOIL CHEMICAL CHARACTERISTICS AND YIELD OF MAIZE IN AN INCEPTISOL AS AMENDED WITH COMPOST]. Vast area of inceptisol in Indonesia is a potential natural resource for improving the domestic maize production. The amendment of organic material is expected to make correction on the fertility problem inherent in the soil. Objective of this study was to determine the optimum dose of compost for some soil chemical properties and maize performances. The doses of compost consisted of 0, 2.5, 5, 7.5, 10, and 12.5 ton/haa were allotted randomly on the experimental plots according to completely randomized design with three replications. Observations were made on the exchangeable Aluminum (Al-dd), pH, organic carbon, water content, plant height, unhusked and husked ear weight, and grain yield. Analysis of variance showed that the dose of compost had significant (P?0.05) effects on pH and C-organic in soil. Giving compost at a dose about 12.5 ton/ha could increase the pH about 4.9, whereas giving compost at a dose about 10 tonha-1 could increase C-organic about 3.09 %. In other hand, the giving of compost with various dose did not give significantly (P>0.05) affect towards Aluminium (Al-dd), pH, C-organic, water content, height of plants, weight of without husk, weight of cob with husk, weight of dry corn beans. The highest grain yield (2,415.75 kg/ha) was observed on compost applied at dose 12.5 ton/ha.
, M. Hazmi, Oktarina Oktarina
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 60-65; doi:10.31186/jipi.20.2.60-65

Abstract:
[PERFORMANCES OF TEN SOYBEAN VARIETIES AS INTERCROPPED WITH SUGARCANE]. An intercropping system between soybean and sugarcane may be an alternative to increase soybean production in Indonesia, but not all soybean varieties are suitable for intercropping system as different soybean varieties may perform differently under intercropping system and monoculture system. Therefore, suitable soybean varieties for intercropping should be identified to warrant the higher crop productivity. This study was conducted to to compare the growth and yield performances of ten soybean varieties in monoculture and soybean-sugarcane intercropping systems. The experiment was laid in a Split Plot Design with three replications. The cropping systems (monoculture and intercrop) were allotted in the main plots, while the soybean varieties (Gepak Kuning, Kaba, Wilis, Tanggamus, Burarang, Sinabung, Anjasmoro, Agromulyo, Ring-1, and Gema) were assigned as the sub plots and allotted randomly in each main plot. On overall, the intercropping system had significantly reduced the soybean pod number, seed number, wight of 100 seed, and, seed yield/plant, but increased plant height as compared to the monoculture system. The exceptions were observed for seed number and weight of 100 seed. The reduction of seed number was not significant on Agromulyo and Dering-1.On the other hand, Anjasmoro and Dering-1were the only varieties showed significant reduction in weight of 100 seed. Kaba, Willis, Tanggamus, Burarang, Sinabung, and Dering-1 showed their consistant performormances across the cropping systems. However, the higher seed yield/plant in both systems was observed on Gepak Kuning, Willis, Burarang, Agromulyo, Dering-1, and Gema.
Irma Cahyoko, Dwinardi Apriyanto, Kanang S. Hindarto
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 40-45; doi:10.31186/jipi.20.2.40-45

Abstract:
[INCIDENCE OF THE RICE YELLOW STEM BORER (Schirpophaga incertulas Walker) ON THREE RICE VARIETIES IN KEMUMU, NORTH BENGKULU]. Rice yellow stem borer (RYSB), Schirpophaga incertulas Walker, often causes yield loss in irrigated rice field. Dead heard and white ear head are the common symptomps resulted from the larval damage. The use of resistant varieties may reduce the risk of yield loss, but the resistance may lose quickly as the varieties are continually grown in a large area. The assessment of the insect incidence in rice field is necessary in order to determine the status of the pest for certain period of time. The objective of the study was to determine the incidence and damage incurred by RYSB in three rice varieties, Mekongga, Cibogo, and Situ Bagendit at farmer rice fields. A survey was conducted in December 2017-February 2018 in Kemumu, North Bengkulu Regency. Observation of RYSB was made on randomly selected 30 hills from + 1 ha area for each variety that was located adjacent to each other. Grain yield was measured from the sampled hills and from 3 plots of 9 m2 . Weight of 1000 grain was measured from grain of three sampled hills. The results revealed that the incidence of RYSB was low, as indicated by the presence of egg mass and larvae of RYSB, and no significant difference was found among the three varieties. Nevertheless, the average cumulative number and percentage of dead heart and white ear head was significantly lower in Mekongga than those of Cibogo and Situ Bagendit. In term of grain yield, however, Mekongga outperformed the other two varieties. The low incidence of RYSB might suggest that growing different variety practiced by local farmers was able to suppress pest population, and therefore it should be implemented in all main areas of rice production.
Evelyn Evelyn, , Entang Inoriah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 46-50; doi:10.31186/jipi.20.2.46-50

Abstract:
[GROWTH AND LETTUCE YIELD (Lactuca sativa L.) BY GIVING MANURE AND RICE HUSK ASH IN INCEPTISOL]. Increasing market demand for lettuce (Lactuca sativa L.) makes the prospect of developing lettuce very promising. Bengkulu Province is dominated by inceptisol soil types which have low soil fertility, making it less optimal for lettuce growth. Giving organic matter can increase soil fertility through improving soil physical, chemical and biological properties so that it can support the growth of lettuce. This study aims to determine the dosage of manure, the dose of rice husk ash and the optimal dose interaction for lettuce growth and yield. This research was conducted from May 2018 to July 2018 in Medan Baru, Muara Bangkahulu Subdistrict, Bengkulu City. The research design used was a Completely Randomized Design (CRD) consisting of two factors and repeated 3 times. The first factor is the dosage of cow manure with three levels, namely: 0 tons/ha, 15 tons/ha, and 30 tons/ha. The second factor is the dose of rice husk ash which consists of three levels, namely 0 tons/ha, 3 tons/ha, and 6 tons/ha. Data from the observations were analyzed statistically by Analysis of Variance (ANOVA) using the F test at the level of 5%. To determine the dosage of manure, the dose of rice husk ash and the optimal combination of doses for growth and yield of lettuce used the Polynomial Orthogonal method. The results showed that there was no interaction between cow manure and rice husk ash on the growth and yield of lettuce. The effect of cow manure has not shown the optimum dose for growth and yield of lettuce. The addition of manure doses up to 30 tons/ha was able to increase the value of plant height, number of leaves, leaf area, and fresh weighted plant weight of 0.189, 0.038, 0.931 and 0.104 respectively. Giving rice husk ash up to a dose of 6 tons/ha did not have a significant effect on all observed variables.
Filsafat Waruwu, Bilman Wilman Simanihuruk, Prasetyo Prasetyo, Hermansyah Hermansyah
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 7-12; doi:10.31186/jipi.20.1.7-12

Abstract:
[GROWTH OF OIL PALM SEEDLINGS IN PRE-NURSERY UNDER DIFFERENT MEDIA COMPOSITIONS AND CONCENTRATIONS OF Azolla pinnata LIQUID FERTILIZER]. Vigourous seedling is prerequisite to successful production of oil palm. Aside from the genetic quality of the planting material, supply of nutrients during early growth of the seedling play an important role in determinting the overall seedling performances. This study was performed to determine the best combination of media composition and concentration of liquid fertilizer made of Azolla pinnata for oil palm seedling growth during pre-nursery. A factorial arrangement of the treatments involving growing media consisted of different composition of oil palm empty fruit bunches compost and soil (1: 1, 1: 2, and 2: 1 v/v) and different concentration of Azolla pinnata liquid fertilizer applications (0, 20, 40, and 60 mL/L) were arranged in a randomized complete block design with three replications. Data were collected for leaf number, stem diameter, seedling height, and leaf greenness at 30, 60, and 90 days after sowing (DAS). A significant interaction effect between the treatments was observed on leaf number at 60 and 90 DAS. A further regression analysis revealed that the highest number of leaves (4.3 at 60 DAS and 6.9 at 90 DAS) were attained on the media composition of 1:1 with liquid fertilizer application at 37.5 and 56 mL/L, respectively. Seedling height and stem diameter at 90 DAP showed quadratic responses to the increasing concentration of the liquid fertilizer applications. The maximum seedling height (26.22 cm) was attained at the liquid fertilizer concentrations of 36.21 mL/L. Similarly, the maximum stem diameter (7.43 mm) was attained at the concentration of 51.00 ml/L. The leaf greeneess at 60 DAS was increased in a linear fashion with the increasing concentration of the liquid fertilizer.
Nurlina Banjarnahor, Kanang Setyo Hindarto, Fahrurrozi Fahrurrozi
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 13-18; doi:10.31186/jipi.20.1.13-18

Abstract:
[RELATIONSHIP OF SLOPE STEEPNESS TO SOIL WATER CONTENT, SOIL PH, AND PERFORMANCES OF GERGA ORANGE AT LEBONG REGENCY]. In Lebong Regency, gerga orange is commonly grown in hilly areas and many of the crop stands were found on steep sloped land. Objective of this study was to determine the pattern of relationship of slope steepness to soil water content, soil pH, and the overall plant performances. Soil samples were collected from the area below the canopy of 300 gerga orange trees differing in the slope steepness for for soil water content (SWC) and soil pH. The observation of plant performances were also made from the same tree as used for the soil properties observations. The analysis of regression indicated that relationship of slope steepness to both the observed soil properties and plant performances could be represented by the linear models suggesting that all the observed variables were reduced along with the increasing slope steepness.
Ramalan Manahara Simamora, Yulian Yulian, Edhi Turmudi
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 19-25; doi:10.31186/jipi.20.1.19-25

Abstract:
Talas (Colocasio esculenta (L). Schott) merupakan salah satu komoditas pangan yang belum termanfaatkan secara maksimal. Potensi komoditas tersebut belum didukung dengan data yang baik. Untuk menggali potensi yang dimiliki tanaman talas perlu dilakukan pendataan sifat pentingnya dengan melakukan karakterisasi. Karakterisasi dapat dilakukan berdasarkan karakter morfologi dan fisiologi tanaman. Penelitian ini bertujuan untuk mengidentifikasi penampilan 10 genotipe talas pada fase vegetatif di lahan pesisir. Penelitian ini dilaksanakan pada bulan Juni sampai Agustus 2015 di Kelurahan Sukamerindu, Kecamatan Sungai Serut, Kota Bengkulu dengan ketinggian tempat + 14 m dpl. Penelitian ini menggunakan Rancangan Acak Kelompk Lengkap (RAKL) dengan 10 genotipe talas dan masing-masing perlakuan diulang 3 kali sehingga diperoleh total 30 unit percobaan dengan total 240 tanaman. Hasil penelitian menunjukkan bahwa secara morfologi talas dikelompokkan berdasarkan warna batang (Putih : genotipe T2, T4, T5, T6, T7, T8 dan T9, pink pucat : genotipe T1, T3, orange kemerah mudaan : genotipe T10), warna daun (Hijau : genotipe T2, T3, T4, T5, T6, T8, T9 dan T10, hijau tua : T7, hijau keunguan : T1), bentuk daun (perisai : genotipe T1, T6, delta : genotipe T2, T3, T7, Oval : genotipe T5, T8, T9 dan T10, hati : genotipe T4), ujung daun (Runcing: genotipe T1, T2, T3, T4, T9, T10, tumpul : genotipe T5, T6, T7, bundar : genotipe T8) tepi daun (Bergelombang : genotipe T1, T2, T3, T5, T6, T8, T9, T10, rata : genotipe T4,T7), dan warna tangkai daun (Hijau : genotipe T2, T4, T10, hijau kekuningan : genotipe T5,T8,T9, hijau kebiruan : genotipe T7, hijau keunguan : genotipe T3, T6, hitam : genotipe T1). Terdapat beda sangat nyata antar 10 genotipe talas dalam hal tinggi tanaman, tingkat kehijauan daun, diameter batang semu dan jumlah anakan.
Riski Ramadhona, Djamilah Djamilah, Mukhtasar Mukhtasar
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 1-6; doi:10.31186/jipi.20.1.1-6

Abstract:
[EFFICACY OF PAPAYA LEAF EXTRACT IN CONTROLLING COTTON APHID DURING VEGEATIVE GROWTH STAGE OF EGGPLANT]. Cotton aphid (Aphis gossypii Glover) can cause serious economic losses in the eggplant production. The application of synthetic pesticides can be effective in controlling the pest but it may not be the best solution for the human health and environment. Botanical pesticides have long been known for their potential as the alternative to synthetic pesticides for crop protection with reduced risk to human health and environmental hazard. Objective of this study was to compare the efficacy of papaya leaf extract solutions in controlling cotton aphid and their effect on the vegetative growth of eggplant. Papaya leaf extract solutions differing in concentration (0%, 10%, 20%, 30%, 40%, and 50%) were sprayed onto aphid infested eggplants to observe the insect mortality, crop damage, and the lethal concentration at LC50 and LC90. The mortality of aphid was significantly increased following the application of papaya leaf extract, with the highest mortality (91.33%) was found on the concentration of 50%. The lethal concentrations of the extract causing 50% (LC50) and 90% (LC90) aphid mortality were 9.98% and 41.99%, respectively. As compared to the control treatment, the crop damage was significantly reduced by the application of the papaya leaf extract solution.
Ringki Putra Azalika, Sumardi Sumardi, Sukisno Sukisno
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 20, pp 26-32; doi:10.31186/jipi.20.1.26-32

Abstract:
Salah satu upaya peningkatan produksi padi adalah dengan pengembangan pertanian di lahan – lahan sub optimal yaitu dengan penanaman varietas padi yang toleran kekeringan seperti kultivar sirantau. Penelitian ini bertujuan untuk menentukan jenis dan dosis pupuk kandang yang optimum untuk pertumbuhan dan hasil padi sirantau. Penelitian telah dilaksanakan pada bulan Januari 2016 - Mei 2016 di Kebun Percobaan Fakultas Pertanian Universitas Bengkulu. Penelitian ini merupakan percobaan pot faktorial dua faktor, menggunakan rancangan percobaan RAL (Rancangan Acak Lengkap). Faktor pertama adalah jenis pupuk kandang, yaitu Pupuk kandang Sapi, Pupuk kandang Kambing, Pupuk kandang Ayam. Faktor kedua adalah dosis pupuk kandang, yaitu 5 ton/ha, 10 ton/ha, 15 ton/ha, 20 ton/ha, dan 25 ton/ha, masing – masing perlakuan diulang sebanyak 3 kali. Variabel yang diamati meliputi tinggi tanaman, jumlah anakan total, jumlah anakan produktif, panjang malai, jumlah bulir per malai, persentase bulir bernas, bobot 100 gabah kering, dan bobot gabah kering perumpun. Hasil penelitian menunjukkan bahwa jenis pupuk kandang memberikan pengaruh nyata terhadap variabel jumlah anakan total, jumlah anakan produktif dan bobot gabah kering per rumpun. Pupuk kandang ayam dengan dosis 10 ton/ha memberikan hasil padi terbaik dengan potensi hasil 123,13 g per rumpun (5,77 ton/ha).
Dwatmadji Dwatmadji
Jurnal Ilmu-Ilmu Pertanian Indonesia, Volume 9; doi:10.31186/jipi.9.2.148-155

The publisher has not yet granted permission to display this abstract.
Page of 2
Articles per Page
by
Show export options
  Select all
Back to Top Top