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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 1 (2012): April 2012" : 2 Documents clear
Penentuan Takaran Pupuk Nitrogen pada Tanaman Jagung Hibrida Berdasarkan Klorofil Meter dan Bagan Warna Daun Efendi, Roy; Suwardi, Suwardi; Syafruddin, Syafruddin; Zubachtirodin, Zubachtirodin
Jurnal Penelitian Pertanian Tanaman Pangan Vol 31, No 1 (2012): April 2012
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (253.395 KB) | DOI: 10.21082/jpptp.v31n1.2012.p%p

Abstract

Synchronization the amount of N nutrient needed for maize growth and the availability of indigenous N in the soil + N fertlizer, is important to obtain a high maize yield. An alternative technique to identify the N nutrient adequacy on maize is by using the chlorophyll meter or the leaf color chart (LCC). The research objective was to determine the rate and time of N fertilizer application for hybrids maize based on the content of N in the leaf as measured by chlorophyll meter and LCC. The experiments were conducted using a split plot design with three replications. The main plots were the rate of N fertilizer, namely 0, 75, 150, and 225 kg N/ha. The subplots were the corn varieties Pioneer 21 and Bisi 2. Results showed that the N fertilizer requirements for maize crops as measured using the chlorophyll meter and the LCC were positively correlated with the actual levels of N requirement. Both measurement techniques can be used to identify the N nutrient requirement for maize during the plant growth stages V12 and VT. Determination of the critical N status by grouping stages of plants with sufficient and insufficient N nutrient indicated that chlorophyll meter value was more accurate than the use of LCC. The deviation of measurements of N fertilizer requirements at plant growth stages V12 and VT using the chlorophyll meter was smaller (11.1% and 2.7%) than those using the LCC (16.1% and 8.3%). The critical N status as measured using the chlorophyll meter and the LCC at V12 was 52 units, and the BWD 4.7, whereas the critical N status at VT was 50 units using the chlorophyll meter and scale 4.4 using the LCC. The estimated N fertilizer required at V12 with maize yield target of 9-10 t/ha was the value of the chlorophyll meter <41unit or the LCC <4 with the rates of N fertilizers of 125-131 kg/ha. If the chlorophyll meter value was 42-46 units or LCC 4.0 to 4.2, the rates of N fertilizer to be applied ranged from 87-119 kg N/ha. With the value of the chlorophyll meter 47-50 units or values of LCC 4.3 to 4.5, the rate of N fertilizer required ranged from 46-78 kg N/ha.
Estimation of Genetic Parameter in New Plant Type Aromatic Rice Lines Lestari, Angelita Puji; Abdullah, Buang; Junaedi, Ahmad; Aswidinnoor, Hajrial
Jurnal Penelitian Pertanian Tanaman Pangan Vol 31, No 1 (2012): April 2012
Publisher : Pusat Penelitian dan Pengembangan Tanaman Pangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (101.969 KB) | DOI: 10.21082/jpptp.v31n1.2012.p%p

Abstract

Information on genetic variability and heritability of plant characters is important to support the rice selection program. A study was conducted to determine the genetic variability of characters and grain yields of 35 New Plant Type Rice Lines (NPTR) under two different environments, with varieties Ciherang and Sintanur as checks. The trials were conducted at two locations (Bogor and Pusakanagara, West Java) during dry season (DS) 2009 and wet season (WS) of 2009/2010. Each trial was arranged in a randomized block design (RBD) with three replications. Twenty one day-old rice seedlings of each entry were planted in 2 m x 5 m plots at a 20 cm x 20 cm plant spacing, one seedling per hill. Results of the combined analysis showed that strains, environments, and its interaction was significantly affecting the whole characters of NPTR. High variabilities were observed on genetic, heritability, and genetic advance characters among the new rice type lines, particularly on the number of productive tillers, total number of grains per panicle, and total grain yield. These three characters were positively correlated with rice grain yield, and could be used as indicators for superior lines.

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