Effectiveness Test of Rhizobium sp. Isolates on the Growth and Production of Peanut (Arachis hypogaea L.) in Inceptisol Land

Universitas Riau, Department of Agrotechnology, Faculty of Agriculture, 28295 Pekanbaru, Indonesia

^* Corresponding author: isna.rahmadini@lecturer.unri.ac.id

Abstract

The nitrogen requirement of legume plants can be optimized by utilizing Rhizobium so that it can ultimately increase the growth of peanut plants. Rhizobium can be found in the root nodules of legume plants such as Mucuna bracteata and acacia. This study aims to determine the type of Rhizobium sp. isolates Local Riau effective in symbiosis with peanuts (Arachis hypogaea L.) and its effect on the growth and production of peanut (A. hypogaea L.). The study was carried out experimentally and used a non-factorial completely randomized design (CRD) with one factor and four replications. The research treatment was Rhizobium sp. (R) consisting of: R0: Control (commercial Rhizobium sp. with Superizogen trademark), R₁: Local Rhizobium isolate code IIDA5, R2: Local Rhizobium sp. isolate code IIDM₁, R₃: Local Rhizobium sp. isolate code IIDM₂, R₄: Local Rhizobium sp. isolate code IIRA₂, R₅: Local Rhizobium sp. isolate code IIRM₁, R₆: Local Rhizobium sp. isolate code IIRM₄. The results of research on the application of Rhizobium sp. to peanut plants showed that isolates of Rhizobium sp. Riau local with code IIRM4 is Rhizobium sp. from the M. bracteata plant in Riau peatlands which is very effective in symbiosis with peanuts.