Nodulation, yield and quality of soybean as influenced by integrated nutrient management

MA Alam,MY Prodhan,MAH Chowdhury,A Siddiqua

doi:10.3329/jbau.v7i2.4723

Abstract

A field experiment was conducted at the Horticultural Farm of Bangladesh Agricultural University, Mymensingh during the period from November 2007 to March 2008 to study the effect of integrated nutrient management on nodulation and sustainable soybean production. There were significant differences among the different treatment combinations in terms of yield and yield contributing characters. Integrated nutrient management with application of 50% of the recommended doses of urea, TSP, MOP, gypsum and biofertilizer (Bradyrhizobium) at the rate of 1 kg ha-1 significantly increased most of the parameters, such as the highest plant height, number of nodule per plant, nodule dry weight per plant, pods per plant, grains per pod, grain yield, oil and protein contents. Coinoculation of Bradyrhizobium seemed to help reduce the NPKS requirement in soybean cultivation. Overall results indicate that the application of integrated nutrient management of biofertilizer (Bradyrhizobium) with ½ NPKS of the recommended dose would produce the best quality of soybean with higher nodulation and yield. Keywords: Nodulation; Integrated nutrient management; Inoculation DOI: 10.3329/jbau.v7i2.4723 J. Bangladesh Agril. Univ. 7(2): 229-234, 2009

Highlights

Plant height of soybean responded significantly to the integrated use of biofertilizer (Bradyrhizobium) and 50% of the recommended dose of chemical fertilizers NPKS (Table 1)
The highest plant height was observed at 120 days after sowing (DAS) in the treatment T7 (77.13 cm) followed by the treatment T6 (65.60 cm) and the lowest was recorded in the control treatment (41.60 cm)
The inoculation of Bradyrhizobium and chemical fertilization had a significant effect on total number of nodules plant-1at different days after sowing (Table 2)

Summary

Introduction

Plant height of soybean responded significantly to the integrated use of biofertilizer (Bradyrhizobium) and 50% of the recommended dose of chemical fertilizers NPKS (Table 1). This study is similar to that of Singh and Rai (2005) who observed that integrated use of chemical fertilizers and biofertilizer increased plant height significantly in soybean. The inoculation of Bradyrhizobium and chemical fertilization had a significant effect on total number of nodules plant-1at different days after sowing (Table 2).

Results

Conclusion