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INDONESIA
Jurnal Penelitian Pertanian Tanaman Pangan
Published by Pusat Penelitian dan Pengembangan Tanaman Pangan
ISSN : 25415166     EISSN : 25415174     DOI : 10.21082
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Penelitian Pertanian Tanaman Pangan merupakan publikasi yang memuat makalah ilmiah primer hasil penelitian tanaman pangan (padi dan palawija). Redaksi menerima makalah dari peneliti Puslitbang Tanaman Pangan, Balai Pengkajian Teknologi Pertanian (BPTP), maupun perguruan tinggi. Makalah yang dikirimkan hendaknya sudah mendapat persetujuan dari pimpinan instansi masing-masing. Ketentuan penulisan makalah untuk dapat dimuat di jurnal ini tertera dalam "Author Guidelines/Petunjuk bagi Penulis" di halaman terakhir Jurnal Penelitian Pertanian.
Arjuna Subject : -
Articles 2 Documents
 1 
Search results for , issue " Vol 32, No 1 (2013): April 2013" : 2 Documents clear
Viabilitas dan Infektivitas Formulasi Cendawan Entomopatogen Lecanicillium lecanii sebagai Biopestisida Pengendalian Telur Kepik Coklat Riptortus linearis Prayogo, Yusmani; Santoso, Teguh
Jurnal Penelitian Pertanian Tanaman Pangan Vol 32, No 1 (2013): April 2013
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.105 KB) | DOI: 10.21082/jpptp.v32n1.2013.p57-69

Abstract

Lecanicillium lecanii fungi is an effective entomopathogenic fungus to control soybean pod sucking bug. The fungi is able to parasitize spore of pathogens that cause major diseases of soybean, such as rust, downy mildew, and powdery mildew. The study was aimed to determine the 12 formulations that can maintain spore viability and infectivity for 12 months. The formulations used talk, kaolin, sweet potato flour, cassava flour, rice flour, corn flour, soybean flour, mungbean flour, peanut flour, potato flour, molasses, peanut oil, and soybean oil based medium. Each medium was sterilized and mixed individually with conidia suspension of L. lecanii to form powder formulations that contained 107 conidia/ml. The spore viability and infectivity were tested after storing the formulations for twelve months. The result showed that viability and infectivity of spores in the formulation was lower with the longer period of storage. Viability of conidia in the formulation decreased to the lowest 20% after 12 months storage, especially that in peanut powder formulation. The spore viability in the cassava flour formulation was the highest (95%). Infectivity of the L. lecanii formulation using cassava flour to inhibit egg hatching of brown stink bug was 60% after 12 months storage. The viability and infectivity of L. lecanii spores in powder formulation was better than those in liquid formulations.
Pengaruh Kekurangan Air terhadap Karakter Agronomis dan Fisiologis Genotipe Kedelai Hitam Taufiq, Abdullah; Adie, M. Muchlish
Jurnal Penelitian Pertanian Tanaman Pangan Vol 32, No 1 (2013): April 2013
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.58 KB) | DOI: 10.21082/jpptp.v32n1.2013.p25-35

Abstract

Drought stress during generative stage might reduce soybean yields up to 90%. This problem can be minimized by manipulating the environment or using tolerant varieties. A glasshouse research was done to evaluate the effect of drought stress on agronomic and physiologic characteristics of black grain soybean at the Indonesian Legumes and Tuber Crops Research Institute, Malang, from August to November 2010. Twenty genotypes of black grain soybean were evaluated under 100% (optimum) and 50% of field capacity (drought stress). The experiment was arranged in a randomized complete block design with four replications. The results showed that drought stress did not affect flowering dates and physiological maturity of pods, but significantly reduced plant height, shoot and root dry weight, root volume, number of branches, number of fertile nodes, and number of filled pods. The highest reduction was on shoot dry weight (70%) and number of filled pods (43%). Drought stress reduced transpiration rates and seed yield by 40% and 32-60%, respectively. Generally, soybean genotypes that had high transpiration rates under drought condition were more tolerant to drought. The highest average of soybean yields were found on genotypes AYT10-11 (6.20 g/plant) and AYT-10-16 (6.14 g/plant), and both were tolerant to drought stress with yield reductions 34.3% and 49.1%, respectively. The tolerance genotypes was mainly because roots were able to absorb more water under the drought stress conditions (3.29 l and 2.90 l, respectively) and had high water use efficiencies (2.99 and 2.85 mg seed/l, respectively). Genotype AYT10-3 showed a high tolerance to drought with 31.9% yield reduction and a lower transpiration rate under drought condition (2.60 l) than genotypes AYT10-11 and AYT-10-16, but higher in water use efficiency (3.11 mg seed/liter). However, AYT10-3 had a low yield (5 g/plant) and smaller seed size (8.9 g/100 seeds). Variety Detam 1 and Malika was each moderately sensitive to drought stress. The yields of these varieties were reduced by 46% and 51%, respectively, under drought stress condition.

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