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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 31, No 2 (2012): Agustus 2012" : 2 Documents clear
Toleransi Beberapa Genotipe Padi Umur Pendek terhadap Pasokan Air Terbatas Yamin, Mohamad; Suprihatno, B.; Rustiati, Tita; Sitaresmi, Trias
Jurnal Penelitian Pertanian Tanaman Pangan Vol 31, No 2 (2012): Agustus 2012
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.399 KB) | DOI: 10.21082/jpptp.v31n2.2012.p%p

Abstract

Field and screen house experiments were conducted in 2009 in Indramayu and Sukamandi. The field experiments was carried out at farmer’s field in the Cilandak village, Anjatan District, Indramayu Regency from May to October 2009. Nine rice genotypes (AS996, OM5240, BP5478-2F-KN-11-2-B, Inpari 10, Inpari 1, Silugonggo, dan Dodokan) were tested. The experiment was arranged in a randomized block design with three replications. The treatments were: (a) fully irrigated (100% irrigated); (b) half-dry (75% irrigated), irrigation water was given until one month after planting, followed with weekly irrigation until crop harvest, and (c) dry (50% irrigated), irrigation water was given until one month after planting, then no more irrigation was given until harvest. The plant characters observed were: percentage of empty grain per panicle, grain weight per unit area, drought sensitivity index (S), and genotype superiority index (Pi). The screenhouse experiment was conducted in pots at the Rice Research Institute, Sukamandi, from July to October 2009, arranged in a completely randomized block design with three replications. The rice genotypes tested were the same as those in the field trial, The treatments wer three categories of water supply, namely minimum (4,000 m3/ha/season), optimal (5,500 m3/ha/season) and excessive (7,000 m3/ha/season). The plant characters observed were: grain weight (g/pot), percentage of filled grains/panicle, plant height, and age of flowering. The results showed that water stress during flowering stage increased percentage of empty grains from 25.6% to 34.3% and decreased grain yields from 11.3% to 23.2%. Genotypes AS996, OM5240, and BP5478-2F-KN-11-2-B were tolerant to drought, and gave higher yields than Inpari 10, Inpari 1, Silugonggo, and Dodokan. Under drought stress conditions, when the drought conditions were not extreme with soil moistures of 41.3% to 51.7%, yields of the three genotypes were not significantly tolerances from those under the normal condition (6.66 to 7.27 t/ha). Besides drought tolerant, genotypes AS996 and OM5240 were also efficient in using water during the crop growth.
Respons Biologi Wereng Batang Coklat terhadap Biokimia Tanaman Padi Rahmini, Rahmini; Hidayat, Purnama; Ratna, Endang Sri; Winasa, I Wayan; Manuwoto, Syafrida
Jurnal Penelitian Pertanian Tanaman Pangan Vol 31, No 2 (2012): Agustus 2012
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (107.625 KB) | DOI: 10.21082/jpptp.v31n2.2012.p%p

Abstract

In developing rice varieties resistant to brown planthopper (BPH), information on responses of the BPH to the rice plants were needed. The aim of the research was to study the biological responses of BPH on biochemical factors of some rice varieties. The study was conducted on June 2010 to April 2012 in Muara Research Station, of the Indonesian Center for Rice Research (ICRR) and at Laboratory of Physiology and Toxicology, Plant Protection Department, Bogor Agriculture University. The biological responses of the BPH to rice varieties were studied in terms of adult settling preference, feeding activity using the honeydew test, and life table analysis. The biochemical factors of the rice varieties, namely sucrose and oxalic acid contents were analyzed. Rice varieties TN1 (no resistance gene), IR26 (Bph1), IR42 (bph2), IR64 (Bph1+), IR74 (Bph3), PTB33 (bph2+Bph3), and Inpari13 (unknown resistance gene) were used in this study. The BPH showed similar non-preference reactions to the resistant varieties and Inpari13 for settling. Feeding activity of the adult female BPH was the highest on the susceptible variety TN1 and the lowest on the resistant variety PTB33. The highest mortality of BPH occurred at larval stages, especially in the first and second instars. The intrinsic rate of increase (rm) and net reproductive rate (Ro) of the BPH were higher on the susceptible variety TN1, but the doubling time (DT) was shorter than those on the resistant varieties. The resistant variety PTB33 contained high oxalic acid and low sucrose. On the contrary, the susceptible variety TN1 contained low oxalic acid and high sucrose. These biochemical factors contributed in rice plant resistance to BPH.

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