Crop and soil productivity of a rice-green gram system under integrative nutrient management

A field study was conducted at the Instructional Farm, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India, on exploring productivity and soil quality of aromatic rice-green gram system by dual influence of organic and inorganic sources of nutrients. Among integrated nutrient management practices, 50% NPK + 50% recommended dose of nitrogen (RDN)-farm yard manure (FYM) to rice produced the highest grain yield (3875 kg ha(-1)) followed by 75% NPK+ green manure (GM; 3489 kg ha(-1)). Likewise, residual effect of 50% NPK + 50% RDN-FYM to rice and application of 75% NPK+ Rhizobium+ phosphate solubilizing bacteria (PSB) to green gram produced the highest seed yield of green gram (812 kg ha(-1)).Combined application of 50% NPK+ 50% RDN- FYM to rice and 75% NPK + Rhizobium+ PSB to green gram resulted in significantly (p = 0.05) higher system rice equivalent yield (6521 kg ha(-1)) and production efficiency (31.2 kg ha(-1) day(-1)) while increasing the nutrient uptake of short grain aromatic rice-green gram system. The highest PFPN (132.7 & PLUSMN; 12.4 kg kg(-1)) and nitrogen uptake efficiency (0.73 & PLUSMN; 0.06 kg kg(-1)) were also recorded due to the application of 50% NPK+ 50% RDN-FYM to rice and 75% NPK + Rhizobium + PSB to green gram (99.0 & PLUSMN; 26.3 kg kg(-1), 0.61 & PLUSMN; 0.01 kg kg(-1), 1.32 & PLUSMN; 0.40, and 19.5 & PLUSMN; 2.9, respectively). Application of 75% NPK+ GM to rice and 75% NPK + Rhizobium + PSB to green gram significantly (p = 0.05) increased soil organic carbon, available N, P, K, Fe, Mn, Zn, and Cu as well as microbial status of soil.