NODULATION IN COWPEA AS AFFECTED BY INTEGRATED NUTRIENT MANAGEMENT

Cowpea was grown at four levels of NPK (0,50,75,100% based on STR) without and with FYM @ 10t ha-1 in main plots under split plot design. Sub plots were treated with four levels of bio-fertilisers (No inoculation, N2-fixers viz., Rhizobium in Cowpea, PSB and Rhizobium + PSB). Observations at 45 days after sowing reveal that application of NPK up to 100% STR and addition of FYM @ 10 t ha-1significantly increased the number of nodules per plant and its fresh and dry weight. The highest number of nodules per plant and its fresh and dry weight was observed at 100% NPK level and 10 t ha-1 FYM respectively. Similarly inoculation with Rhizobium and PSB alone or in combination significantly increased the number of nodules perplant and their weights with best results under dual inoculation.