Journal of Applied Agricultural Science and Technology

Journal Information
ISSN / EISSN : 2621-4709 / 2621-2528
Published by: Politeknik Pertanian Negeri Payakumbuh (10.32530)
Total articles ≅ 72
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Dian Pramana Putra, Novelina Novelina, Alfi Asben
Journal of Applied Agricultural Science and Technology, Volume 5, pp 38-49; https://doi.org/10.32530/jaast.v5i1.9

Abstract:
Sago hampas is waste from processing sago starch. Sago hampas is generally thrown away without any further treatment. Sago hampas contain nutrients that can be used as a substrate for fermentation of angkak. The study aims to determine the stability and toxicity of angkak pigment powder from sago hampas-rice flour substrate. The study used exploratory research design through experiments in the laboratory. This study used the UV-vis spectrophotometer method in observing the stability of the Angkak powder pigment and the brine shrimps method of angkak pigment powder toxicity test. The results showed that the level of solubility of angkak pigment powder will increase at higher temperatures. Stability of angkak pigment powder tends to decrease with longer heating, the higher of heating temperature and the longer of irradiation. Angkak pigment powder are more stable at neutral and alkaline pH compared with acidic pH. And it is not toxic to experimental animals with LC50 value of angkak pigment powder of 2,897.05 ppm. The conclusion of this study is that temperature affects the intensity of the angkak pigment. Angkak is unstable along with heating time, heating temperature and longer of irradiation.
Sri Aulia Novita, Hendra Hendra, Perdana Putera, Fithra Herdian, Muhammad Makky, Khandra Fahmi
Journal of Applied Agricultural Science and Technology, Volume 5, pp 50-61; https://doi.org/10.32530/jaast.v5i1.12

Abstract:
Bokar, processed rubber material, is latex obtained from rubber trees of community plantations. The quality of latex can be identified from its features which are white, relatively soft, and odorless. The purpose of this research was to design a simple rubber sheet drying house and examine the quality of dry rubber under Indonesian National Standard. Bokars are processed using a liquid smoke coagulant with a concentration of 10-15% and it obtained a clean white rubber although it has a slight smoke smell. Before drying, Bokar had ground to gain the thickness of the unsmoked sheet/ USS around 3-5 mm. The components of the drying house include the drying room, heating room, heater, thermometer, blower, plenum chamber, ventilation, drying room door, and electric motor. The capacity of the drying house is 200 kg of rubber sheet, with a drying temperature of 35 – 46oC and 6 hours drying time. The rubber produced has good quality with average dry rubber content (DRC) was 73.75%.
Irawati Chaniago, Noverina Chaniago, Irfan Suliansyah, Nalwida Rozen
Journal of Applied Agricultural Science and Technology, Volume 5, pp 13-27; https://doi.org/10.32530/jaast.v5i1.4

Abstract:
Regency of Deli Serdang in the Province of Sumatera Utara has high diversity of landrace rice that has adapted to various climatic and edaphic condition including drought. Studies on various local rice genotypes tolerant to drought is of important to be carried out. This will help plant breeders with germplasms for future breeding program. Polyethylene glycol (PEG) is a water-soluble compound with high osmotic pressure and unlikely to have specific interaction with biological chemicals. With these properties, PEG is often be used in studies of plant response to drought stress. The experiment reported here was aimed at determining rice genotypes, local to Regency of Deli Serdang, tolerant to drought. The experiment was carried out at Laboratory of Physiology and Glass House of Faculty of Agriculture, Universitas Islam Sumatera Utara, Medan from February to April 2020. A two-way factorial experiment was assigned in a completely randomized design (CRD) with 3 replicates. The first factor was 23 local rice genotypes plus 4 genotypes tolerant to drought and the second factor was the concentration of PEG 6000 i. e 0 and 20% (w/v). Observations included percent of germination, plant height, length and number of roots protruding from paraffin-wax layer, leaf chlorophyll content, seedling fresh and dry weight, index of tolerance, probability of resistance, and proline content. Data were analyzed with analysis of variance and mean separation of DNMRT at 5%. Results demonstrated that 6 local rice genotypes, Gemuruh, Ramos Merah, Arias, Sialus, Silayur, and Sirabut were resistant to drought stress under the experimental condition.
Shams Islam, Al Mamun Or Roshid, Shafiqul Islam Sikdar, Sohrab Hossain
Journal of Applied Agricultural Science and Technology, Volume 5, pp 1-12; https://doi.org/10.32530/jaast.v5i1.6

Abstract:
This Research was conducted to investigate the effect of fertilizer management on growth and yield performance of aromatic fine rice varieties. The experiment consisted of two factors were aromatic fine rice and fertilizer management. There were four varieties namely Kalizira, Kataribhog, Tulshimala and BRRI Dhan34 with four fertilizer treatments recommended dose of fertilizers (T1), cowdung @ 10 tha-1 (T2), 50% of recommended dose of fertilizers + 50% cowdung(T3), 75% of recommended dose of fertilizers + 50% cowdung (T4). The result showed that BRRI Dhan 34 significantly superior for effective tillers number/ hill (18.46), panicles length (26.67cm), grains number/ panicle (146.30), harvest index (40.73 %), grain protein content (6.23%), grain yield (2.79 tha-1), straw yield (4.06 tha-1), and biological yield (6.85 tha-1). Among fertilizer management, the highest effective tillers number/hill (16.20), grains number/ panicle (142.45, panicles length (26.66 cm),1000 grain weight (13.75), grain protein content (10.2%), biological yield (6.30), were obtained from T3 treatment. Based on interaction effect showed that the highest effective tillers number/hill (18.36), grains number/ panicle (155.33), panicles length (26.73 cm), grain protein content (10.80%), biological yield (7.85) was found with BRRI Dhan 34 combined with T3 treatment. However, grain yield increased with the increase in nitrogen levels. Together tillers number/hill, grains number/panicle, grain protein content, harvest index, grain yield was the main responsible yield contributing characters to improve the yield quality of aromatic fine rice.
Nurmansyah Nurmansyah, Herwita Idris, Nasril Nasir
Journal of Applied Agricultural Science and Technology, Volume 5, pp 28-37; https://doi.org/10.32530/jaast.v5i1.8

Abstract:
This study aims to see the effectiveness of essential oils of leaves, rhizomes and fraction of wild ginger Ellettariopsis slahmong CK Lim against the pathogenic fungus Sclerotium rolfsii which causes rot disease of the stem base of peanut plants an in vitro.The study consisted of two sub activities: (a) inhibited of colony diameter using Patato Dextrosa Agar (PDA) medium and (b) inhibited of colony biomass using Potato dextrose Broth (PDB) medium, the treatments tested were leaf essential oil and rhizome of wild ginger and fractions A1, B2, C3 and D4, with concentration levels (0, 100, 250 and 500 ppm). Experiments (a) and (b) were arranged in the form of a Completely Randomized Design (CRD) in factorial each with 4 replications. The results showed that the leaf essential oil and rhizome of wild ginger and its fractions had the potential to be used as a vegetable fungicide. The A1 fraction has the best antifungal effectiveness compared to the B2 fraction, leaf oil, rhizomes and other fractions, with the highest inhibition of diameter and biomass of S rolfsii colony the 49.47% and 51.46%. Essential oils of leaves and rhizome oil are not statistically significantly different, but in numerically leaf oil are better than rhizome oil. The C3 fraction showed the lowest colony diameter inhibition and biomass of 34.70% and 36.95%. The best concentration level in inhibition the growth of S rolfsii mushroom is 500 ppm, with inhibition of the diameter and biomass of the colony by 81.74% and 84.25%.
, James Koske, Monicah Mucheru Muna, Jonathan Muriuki, Innocent Ngare
Journal of Applied Agricultural Science and Technology, Volume 4, pp 118-133; https://doi.org/10.32530/jaast.v4i2.170

Abstract:
Dryland ecosystems have always been prone to relatively high vegetation and general environmental degradation; translating to changes in soil physical and chemical properties and massive carbon losses. Despite their vast surface area, Carbon sequestration therein still remains low. However, this low carbon means they are less saturated and therefore a tremendous potential therein to sequester more Carbon. Conservation agriculture with trees (CAWT) presents an opportunity to reduce the degradation and enhance the carbon stocks. This study was set to compare the biomass productivity and carbon sequestration potential of agroforestry between conventional and conservation agriculture practice. The study was carried out as part of ongoing experimentation established in short rain (SR) season of 2012 by the World Agroforestry Centre in a trial site at the Agricultural Training Centre (ATC) in Machakos county, Kenya. The trials adopted a split plot arranged in a randomized complete block design with two farming systems (conventional and conservation agriculture) as the main blocks, 7 treatments and three replicates, summing to a total of 42 plots. In the fields, two shrub species (Calliandra calothyrsus Meissn. and Gliricidia sepium Jacq.) were planted in three different spacing (1.5x1 m, 3x1 m, 4.5x1 m) for maize-legume intercrops. Trees were harvested by coppicing, weighed and leaf/twig samples taken for determination of biomass, which was then converted to Carbon using a conversion factor 0.5. The data was statistically analyzed using ANOVA and means separated using LSD at p
, Yenny Liswarni, Martinius Martinius
Journal of Applied Agricultural Science and Technology, Volume 4, pp 134-145; https://doi.org/10.32530/jaast.v4i2.146

Abstract:
The consortia of endophytic bacteria with various mechanisms (competition, antibiotics, induction of resistance, and others), simultaneously, are more effective in controlling pathogens and increasing plant growth. The purpose of this study was to obtain endophytic bacterial consortia capable of suppressing of bacterial leaf blight and promoting the growth of rice plants. The study consisted of three experimental stages. The first stage was the test on the antibiosis ability of the endophytic bacterial consortia to suppress of pathogenic bacteria Xanthomonas oryzae pv. oryzae (Xoo) using the Kirby Bauer method. The second stage was the test on the ability of endophytic bacterial consortia to promote the growth of rice seedlings. The experiment was arranged in a Completely Randomized Design (CRD) which consisted of six combinations of endophytic bacterial consortia and 15 replications within each combination. The endophytic bacterial consortia were introduced by soaking the seeds, and the observations were made on the plant height, number of leaves, root length, fresh weight, and dry weight of rice seedlings. Meanwhile, the third stage was the test on the ability of endophytic bacterial consortia to suppress of bacterial leaf blight (BLB) diseases and to promote the rice plant growth. The experiment was arranged in a Completely Randomized Design (CRD) with six combinations of endophytic bacterial consortia and five replications within each combination. The endophytic bacterial consortia were introduced by soaking the roots of the seedlings. The observations were made on the incidence of disease, disease severity, number of leaves, plant height, and number of tillers. The results showed that all endophytic bacterial consortia had antibiosis abilities. The best endophytic bacterial consortia for controlling bacterial leaf blight and promoting the growth of rice seedlings and plants were the C (Bacillus sp SJI; Bacillus sp HI) and D (Bacillus sp SJI; S.marcescens isolate JB1E3) consortia.
Mardiana Mardiana, Novriza Sativa, Hari Hariadi, Nanda Triandita, Nela Eska Putri
Journal of Applied Agricultural Science and Technology, Volume 4, pp 189-195; https://doi.org/10.32530/jaast.v4i2.138

Abstract:
Functional drinks can be made from local herbal ingredients that are often used for spices such as cinnamon (Cinnamomum burmanni) and cardamom (Amomum compactum). The purpose of this study is to determine the best formulation of cinnamon and cardamon as a herbal drink based on moisture content, ash content , and sensory evaluation. Raw materials were dried at 50 °C until reached a maximum moisture content 10% and were reduced in size. The formulations were made of comparison between cinnamon and cardamom which were A (100: 0)%; B (80:20)%; C (60:40)%; D (50:50)%; E (40:60)%; F (20:80)%; and G (0: 100)%. The moisture content of all formulas is between 7.12-7.33% (
, Fajar Restuhadi, , Fajar Yuliandri
Journal of Applied Agricultural Science and Technology, Volume 4, pp 170-180; https://doi.org/10.32530/jaast.v4i2.155

Abstract:
Biological processing liquid sago waste is carried out by utilizing microlagae which are symbiotic with decomposer bacteria. The aim of this research was to get chosen treatment of microalgae Chlorella sp. as a reducing BOD, COD and Oil content in Palm Oil Mill Effluent with symbiotic mutualism between microalgae Chorella sp and Agrobost. This research used a Complete Randomized Design (CRD) with treatment 5 times and replication 3 times. This research was microalgae 800 ml/L (with abundance 6.883.000 cell/ml) in 6000 ml of total treatment solution with 5 treatments of Agrobost (0% v/v, 4% v/v, 8% v/v, 12% v/v, and 16% v/v). Data processing using ANOVA and DNRT 5%, the results showed that the concentration of Agrobost had significant affects for BOD, COD, oil and pH. The chosen treatment from the result of this research was 16% v/v which had the value BOD 89.10 mg/L, COD 297.67 mg/L, oil 2.85 mg/L, and pH 9.05.
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