Evaluating the Symbiotic Potential of Glomus intraradices and Bradyrhizobium japonicum in Vertisol with Two Soybean Cultivars

Abstract

A field experiment was conducted to evaluate the symbiotic potential of AM fungus, G. intraradices alone and/or in combination with bradyrhizobial strains in two important soybean cultivars (JS335 and NRC 7). It was found that dual inoculation of G. intraradices + B. japonicum was superior over single inoculation of G. intraradices / B. japonicum in both the soybean cultivars and produced 21.20% and 16.94% higher seed weight of plants of JS 335 and NRC 7 cultivars respectively when compared to control. Comparative data on soil phosphorus before and after field trial revealed significant increase over control after the inoculation of G. intraradices. Dual inoculation of G. intraradices + B. japonicum caused highly significant increase in P budget of rhizospheric soil compared to control. The response of cultivar JS 335 was found to be better in all the inoculations. The present study suggests the suitability of G. intraradices and B. japonicum to be used in combination for enhancing soybean yield and soil fertility in Haroti (Bundi) region of Rajasthan.