Effect of VAM fungi with levels of phosphorus on nutrient uptake fertility and yield of wheat.

摘要

A greenhouse experiment was conducted to investigate the comparative performance of two strains of Glomalean vesicular arbuscular mycorrhizal (VAM) fungi isolated from 'tarai' agro-climatic region with graded doses of P. The treatments consist of three levels of VAM strains: without VAM, Scutellospora and Glomus, and five doses of P: 0, 15, 30, 45 and 60 kg P/ha. Inoculation with both the strains of VAM fungi and doses of P significantly increased thousand wheat grain weight, straw and grain yield, N, P and K uptake in straw, grain and total biomass and available N, P and K in soil except M1 strain in case of K over the control at 5% level of significance. Addition of graded doses of P successively increased all the parameters with increasing levels of P and being maximum with 60 kg P2O5/ha but available K increased only up to 45 kg P2O5/ha. Inoculation with M1 or M2 strains of VAM fungi along with levels of P resulted to significant increase in the grain yield, K uptake in straw, grain and total biomass, N in grain and total biomass but P only in total biomass. Inoculation with M1 and M2 strain individually increased 26.07 and 27.04% more available P in soil over control, which is statistically at par with addition of 15 kg P2O5/ha..