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Results in Journal Jurnal Penelitian Pertanian Tanaman Pangan: 166

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Yuni Widyastuti, Bayu Pramono Wibowo, Satoto Satoto
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 4, pp 1-7; doi:10.21082/jpptp.v4n1.2020.p1-7

Abstract:
Adoption of the hybrid rice varieties by farmers is often impaired by the high price of hybrid seed, due to low yields in hybrid seed production fields. Female outcrossing ability and female hybrid seed production ability, defined as the rate of filled spikelets of the male sterile line and as its grain yield under outcrossing, respectively, determine plant traits for hybrid seed yield. We identified an morphological characters and outcrossing rate ability of 6 hybrid rice combination that affect grain yield of hybrid rice seed production. The experiment conducted in 3 locations i.e. Subang, Malang, and Ungaran districts during dry season of 2016. Subang is the best location to hybrid rice seed production with the highest average of grain yield. Hipa 19 was the hybrid varieties having > 1 ton/ha grain yield highest that others. The important agronomic characteristics that affected of F1 grain yield i.e. plant height, number productive tillers, number of filled grains, exerted panicle rate, dan outcrossing rate. Correlations between number of filled grains, outcrossing rate, and grain yield were tight and highly significant. High yield potential and cost-effective for hybrid seed production can be achieved using hybrid rice with high outcrossing rate and suitable condition of an environment.
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 4, pp 53-62; doi:10.21082/jpptp.v4n1.2020.p53-62

Abstract:
Peningkatan produksi kedelai nasional dapat diupayakan melalui intensifikasi pada lahan optimal, dan perluasan area tanam pada lahan-lahan suboptimal diantaranya lahan kering iklim kering (LKIK). Salah satu upaya peningkatan produktivitas di LKIK adalah dengan penerapan pola tanam tumpangsari. Penelitian bertujuan untuk mengetahui keunggulan ekonomis dan penerimaan petani terhadap introduksi paket teknologi tumpangsari kedelai dengan jagung di sentra produksi jagung pada LKIK Kabupaten Tuban, Jawa Timur. Penelitian dilaksanakan pada musim tanam Maret-Juli 2019 di Desa Pongpongan Kecamatan Merakurak, dan Desa Gesing Kecamatan Semanding. Parameter yang diamati meliputi keragaan hasil biji kedelai dan jagung, biaya produksi, penerimaan, dan keuntungan usahatani, keunggulan ekonomis pola tanam tumpangsari (R/C rasio, B/C rasio, IKF, dan NKP), dan penerimaan petani. Paket teknologi tumpangsari kedelai dengan jagung, yakni jagung ditanam baris ganda (40 cm x 20 cm) x 200 cm satu tanaman/lubang dan kedelai diantara baris ganda jagung dengan jarak tanam 30 cm x15 cm dua tanaman/lubang (isi 5 baris kedelai), dosis pupuk sesuai kesuburan tanah dan populasi tanaman mampu memberikan keuntungan lebih tinggi dibandingkan pola tanam monokultur jagung. Hal ini karena hasil jagung pada pola tanam tumpangsari juga relatif sama dengan hasil jagung pola tanam monokultur. Tumpangsari kedelai varietas Dena 1 dengan jagung memiliki keunggulan ekonomis lebih tinggi dibandingkan tumpangsari jagung dengan varietas kedelai lainnya, dengan keuntungan Rp 19.146.500/ha; R/C rasio 2,51; B/C rasio 1,51; IKF 12.843; dan NKP 1,69. Petani tertarik untuk mengadopsi paket teknologi tumpangsari ini apabila hasil yang didapatkan lebih menguntungkan dibandingkan pola tanam monokultur jagung yang selama ini diterapkan oleh petani.Kata kunci: lahan kering iklim kering, keunggulan ekonomis, tumpangsari kedelai dengan jagung
Abdullah Taufiq, Afandi Kristiono, Andy Wijanarko, Agustina Asri Rahmianna, Rudy Iswanto, Salam Agus Riyanto
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 4, pp 43-51; doi:10.21082/jpptp.v4n1.2020.p43-51

Abstract:
East Java Province supplies one third of the national peanut production. The farmland of peanut production centers in the region is a coastal area prone to salinity. The use of variety adaptive to salinity stress is an effective strategy to cope sainity problem and to optimize the use of salt-affected land. The aim of the research was to evaluate the adaptability of peanut varieties to salinity stress.The research was conducted in the 2018 dry season in the saline paddy field in Gesikharjo Village, Palang Sub District, Tuban Regency with EC 14.54 dS/m. The treatments consisted of seven groundnut varieties (Singa, Singa, Kancil, Takar 2, Bison, Hypoma 2, Tuban, and Jerapah), using a randomized complete design, four replications. Observations consisted of growth parameters, yield and yield components, proline and macro nutrient (N, P, K) content. The results showed that high salinity stress reduced seed germination, plant growth, yield components and yields of all varieties tested. Based on the ability to survive and yield, Singa variety have showing higher tolerance to salinity stress or more adaptive than other varieties, while the lowest one was found in Jerapah variety. The salinity tolerance of Singa variety did not indicate to be associated with high proline content, but it seem more related to the ability to absorb higher N, and keep K high to reduce negative effect of Na.
Sciprofile linkSujinah Sujinah, Nurwulan Agustiani, Indrastuti A. Rumanti
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 4, pp 17-26; doi:10.21082/jpptp.v4n1.2020.p17-26

Abstract:
Stagnant flooding is a condition in swampy area and become constraints which causes decrease yield of rice. Therefore, it is necesarry of varieties that have tolerance to stagnant flooding. The purpose of this research were to analyze of agronomic and physiological characters of rice on stagnant flooding stress. The experiment was conducted at two environmental conditions in wet season of 2017/2018 in Sukamandi Experimental Station, Subang, West Java. A total of 10 genotypes (IR14D157, IRRI 119, IRRI 154, IR14D121, Inpara 3, Inpara 4, Inpara 8, Inpari 30, Tapus, and IR 42) were planted use Randomized Complete Block Design (RCBD) with 4 replicants. Variables consisted of growth (plant height, tillering, green leaves), stem elongation, nonstructural carbohydrate, chloropyll content, stem aerenchyma, yield component, and yield. The result showed that stagnant flooding caused an increase in plant height of 4% , stem elongation, and flowering. In addition, it was observed the decreased of tiller number of 50%, nonstructural carbohydrate, chloropyll content, productive tiller, spikelet number, % filled grain, and yield. Genotype of IR14D121 and Tapus showed the highest productivity, of 4,91 t/ha and 4,45 t/ha at stagnant flooding, at which productivity decreased up to 20% compared to the optimum condition.
Enti Sirnawati
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 143-152; doi:10.21082/jpptp.v3n3.2019.p143-152

Abstract:
Tujuan penelitian ini adalah untuk menganalisa faktor penentu adopsi komponen teknologi Jarwo Super di tujuh lokasi implementasi kegiatan Jarwo Super yang dilaksanakan pada tahun 2016. Metode penelitian yang digunakan adalah deskriptif kualitatif melalui tabulasi silang dan analisa kuantitatif dengan menggunakan Structural Ecuation Model(SEM). Responden diambil secara purposive dari petani kooperator dan non-kooperator dari lokasi kajian, dengan jumlah petani di masing-masing lokasi sebanyak maksimal 40 responden. Petani non-kooperator yang djadikan responden berasal dari kelompok tani diluar poktan kooperator baik itu dalam desa maupun dari desa terdekat. Berdasarkan Analisa SEM dengan menggunakan software SMART-PLS, faktor dominan yang berpengaruh nyata terhadap adopsi komponen teknologi jarwo super di lokasi penelitian adalah lingkungan social petani, karakteristik inovasi komponen teknologi, serta kemampuan ekonomi petani.
Yoseph Yakob Da Rato, Syatrianty A Syaiful, Muhammad Riadi, Marcia B. Pabendon
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 159-164; doi:10.21082/jpptp.v3n3.2019.p159-164

Abstract:
The research is aimed at discovering the influence of harvesting time of primary plant and buds number on the growth and production of Ratoon Super-1 Sweet Sorghum. The research was held at Cereal Crops Research Institute (Balitsereal) in Maros, South Sulawesi, from September 2017 to January 2018. It used ratoon plants from previous research that planted using super-1 sorghum variety seeds. This research was arranged based on split-plot-design with three replications. Main plot was numbers of ratoon buds (T) after harvesting the primary plants i.e : 1 (one) ratoon buds (T1), 2 (two) ratoon buds (T2), 3 (three) ratoon buds (T3), 4 (four) ratoon buds (T4) and 5 (five) ratoon buds (T5), while sub plot was harvesting time of primary plants i.e : 102 DAP (P1), 109 DAP (P2), 116 DAP (P3) and 123 DAP (P4). Every treatment combination repeated three (3) times to form 60 experimental plots. Interaction of ratoon with 3 buds and harvest of primary plant at 123 DAP reached the largest stem diameter (15,14 mm), the heaviest total biomass (28,43 tons/ha) and stem biomass (20,75 tons/ha), the highest juice volume (1274,33 L/ha) and the highest 90% ethanol content (415,00 L/ha).
Sciprofile linkAldi Kamal Wijaya, Memen Surahman, Abdul Qadir, Giyanto Giyanto
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 117-124; doi:10.21082/jpptp.v3n3.2019.p117-124

Abstract:
Swamp land ecology is a potential land to increase the crop production, especially rice. The research was aimed to increase the production and seed quality of IPB 3S rice variety in swamp land ecology. The research was arranged in Factorial Randomized Complete Block Design with three replications. The first factor was dose of Zinc, consist of 0 kg ha-1, 15 kg ha-1, 30 kg ha-1, and 45 kg ha-1. The second factor was seed treatment by probiotic microbial, consist of control, Bacillus sp, Bacillus sp (+), Chromobacterium sp, Chromobacterium sp (+). Zinc fertilization couldn’t increase the yield characters and seed quality of IPB 3S rice variety. Microbia fertilization could increase the highest yield characters (plant height, tillers, productive tillers, panicle length, weiht per plant, and seed weight per grove), and Bacillus microbial increased the seed quality (Vigor index). Interaction of zinc fertilization (15 kg ha-1) and Chromobacterium increased the yield characters (flag leaf length, panicle length, and seed weight per grove), and the interaction of zink fertilization (30 kg ha-1) and Bacillus increased seed quality (vigour index).
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 125-133; doi:10.21082/jpptp.v3n3.2019.p125-133

Abstract:
Effect of Insecticides to Brown Planthopper (Nilaparvata lugens Stal) Adaptation on Resistant Rice Varieties. Brown planthopper (BPH) (Hemiptera: Delpachidae) is one of major pests on rice cultivation in Indonesia. Resistant rice varieties and insecticides are commonly used by farmers in BPH management. But, BPH can rapidly adapt on long-term planted varieties and insecticide. The aim of research was to study the ability of insecticide resistance BPH in adaptation on resistant rice varieties. This study was conducted at Indonesian Center for Rice Research from October 2018 to June 2019. BPH’s were collected from farmer field and reared for 6th generation. BPH’s were divided into four insecticide population. BPH population sprayed each generation by BPMC (BPMC-BPH), imidacloprid (imidacloprid-BPH), pymetrozine (pymetrozine-BPH), and unsprayed (Control-BPH). In first generation, insecticide resistance conducted to obtain baseline data of BPH resistance to imidacloprid, BPMC and pymetrozine. On 6th generation, insecticide resistance test repeated to each population. Four BPH population were tested for the survival rate, fecundity, amount of honeydew, and rice varieties reaction. Result showed that Field population 1st generation were resistance to BPMC and imidacloprid with Resistance Factor (RF) 4.1 and 13.5-fold, respectively, while to pymetrozine was indicate resistance (RF 3.7-fold). In 6th generation, LC50 all insecticide population were increased, while in Control-BPH were decreased. Inpari 13 still effective againts BPH in all test results. Insecticide resistance-BPH tend to lower adaptation on resistant variety than insecticide susceptible-BPH.
Sciprofile linkIrma Mardian, Awaludin Hipi, Eka Widyastuti
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 153-158; doi:10.21082/jpptp.v3n3.2019.p153-158

Abstract:
The interest of Indonesian farmers to grow soybean is relatively low because the price of soybean is not competitive and tend to be low. Therefore there is a need to increase the interest of farmers to grow soybean. One of them by increasing crop productivity through the use of the right planting system. This study aims to test the various doble row planting systems that is able to provide the best productivity for soybean and increase farmer's income. The research was conducted by demo farm method on 3 ha of farmer land in Ntuwu Lamba farmer group of Sambinae urban village of Bima. The experiment was design based on a randomized block design where there were 3 sowing distance treatments that were planted at 40 x 10-15 cm, double row system 60-30 cm x 10 cm, and double row planting system 40-20 x 10 cm. The result of the study showed that the double row planting system of 60-30 x 10 cm gave the highest yield on both agronomic and yield parameters. Financial analysis shows that jajar legowo of 60-30 x 10 cm resulting in the highest profit of Rp. 10.058.000/ha and R/C ratio of 2.47 and B/C 1.47.
Awaluddin Awaluddin, Ahdin Gassa, Nurariaty Agus
Jurnal Penelitian Pertanian Tanaman Pangan, Volume 3, pp 135-141; doi:10.21082/jpptp.v3n3.2019.p135-141

Abstract:
White stem borer Scirpophaga innotata Walkers is known as a species that always causes loss of rice yields in Indonesia and the Asia region and Australia. White stem borer attacks all stages of rice plant growth starting in the nursery until harvest. Until now, synthetic chemical pesticides are still a mainstay of farmers in controlling these pests. Then it is necessary to promote biological pest management, the use of biological agents is pest management technology because a save, economical and effective. Biological control through multiplication and parasitoid release needs to be focused on parasitoid it has adapted to the local environment. This study aims to examine the role of egg parasitoid S. innotata through the type and level of egg parasitization at various phases of rice plant growth. This research was conducted by collecting as many white rice stem borer eggs as possible based on the growth phase of rice plants, i.e. age 11-25 days after planting (DAP), 26-40 DAP, 41-55 DAP, 56-70 DAP, and 71-85 DAP. Observations were made by counting hatching and non-hatching eggs, as well as the type and number of parasitoids that appeared. The results show that the egg parasitoid found was Trichogramma japonicum Ashmead, Tetrastichus schoenobii Ferriere, Telenomus rowani Gahan. The highest level of egg parasitization is at 71-85 DAP.
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