EFFECT OF ORGANIC MANURES AND PGPR ON NUTRIENT CONTENT AND UPTAKE OF MUNGBEAN

Crop rotation and green manure help to provide nitrogen through legumes, which fix nitrogen from the atmosphere through symbiosis
with the bacteria Rhizobium. Mungbean, being a leguminous crop, has a unique role in fixing atmospheric nitrogen through the
process of biological nitrogen fixation (BNF). Rhizosphere micro-organisms such as plant growth promoting rhizobacteria (PGPR) are
known to improve BNF. Hence to study the effects of PGPR and organic manures, a field experiment was conducted in the organic
farming plot of the Institute of Agricultural Sciences, BHU, Varanasi growing mungbean. The treatments were: Farm yard manure
(FYM), Cereal compost, Legume compost along with the combinations of PGPR. It was found that total N, P and K content of the
stover were 1.42, 0.34 and 1.74% respectively and that of grain was found to be 3.42, 1.36 and 0.51% respectively on the application
of FYM. Co-inoculation with PGPR was found to be more beneficial than non-inoculated manures. FYM+ PGPR treated plots showed
highest nutrient content in grains (3.55, 0.55 and 1.41% N, P2O5 and K2O respectively). The combined application of cereal compost
and legume compost was effective over their sole application. However, highest protein content (21.91%) was found in the plots
receiving all the manures along with co-inoculation of PGPR.