Yield and N2-fixation of groudnut [arachis hypogaea L.] in response to inoculation with selected bradyrhizobium strains and mycorrhizal fungi

ABSTRACT

The effect of inoculation with Bradyrhizobium and/or arbuscular mycorrhizal fungi in the presence of super or rock-P on yield and nutrient content was studied in a pot experimentInoculation with Bradyrhizobium [strain 3456] increased undulation and nitrogen content superior to strain 3339, either super or rock-P, was added and at the same time these parameters were higher in case of rock-P than superphosphate application Inoculation with a mixture of the three inoculants decreased the amount of fixed nitrogen comparable to any other inoculation treatmentsThe possibilities of saving more than 50% of the recommended N fertilizer may be achieved Superphosphate could be replaced by rock-P either solely or in combination with arbuscular mycorrhizal fungi Based on 15N analysis, groundnut derived more nitrogen from air [Ndfa] than from fertilizer [Ndff] or soil [Ndfs]