Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Vol 39, No 1 (2011): Jurnal Agronomi Indonesia

Mekanisme Adaptasi Genotipe Baru Kedelai dalam Mendapatkan Hara Fosfor dari Tanah Mineral Masam

Bertham, Rr. Yudhy Harini (Unknown)
Nusantara, Abimanyu Dipo (Unknown)



Article Info

Publish Date
17 Aug 2011

Abstract

Phosphate deficiency  is one of the main constraints to increase soybean yield in acid mineral soil. An experiment was conducted with an objective to discover scientific base of fertilizer selection based on soybean adaptation mechanism to mitigate P deficiency in acid mineral soils in Bengkulu Province. A factorial experiment was arranged in a randomized complete block design with four replications. The first factor was soybean genotypes, i.e.  Slamet and three new soybean genotypes (NSGs) i.e. 19BE, 25EC and 13ED, and second factor was P fertilization dosages (0 and 400 mg P2O5 kg-1 soil). Soybean was grown in a greenhouse using double pot system. Research results showed that the NSGs had different mechanism in P uptake from soil with high P absorbing capacity compared to Slamet genotype.  NSGs translocated more carbon to root, and decreasing of shoot-root ratio, about 66-70%. NSGs 25EC produce more oxalic and malic acid, and 13ED produce more citric acid to obtain same amount of P absorbed by Slamet variety. Under low P, NSGs developed symbioses with mycorrhizal arbuscular fungus, however, only 19BE which increase microbe population in rhizosfer. Phosphosrus fertilization supressed arbuscular ycorrhizal fungus development (15-100%), alkaline phosphatase activity (20-88%), and microbial C biomass (40-71%) in rhizosphere of new soybean genotypes.   Keywords: acid soil, adaptation mechanism, P acquisition, soybean genotypes

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Journal Info

Abbrev

jurnalagronomi

Publisher

Subject

Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

Description

urnal Agronomi Indonesia, sebelumnya bernama Buletin Agronomi, terbit sejak 1962, diterbitkan oleh Departemen Agronomi dan Hortikultura Fakultas Pertanian, Institut Pertanian Bogor dan Perhimpunan Agronomi Indonesia (PERAGI). Jurnal Agronomi Indonesia merupakan media untuk publikasi tulisan asli ...