Residual Effect of Integrated Nutrient Management on Nodulation, Yield, Quality and Available Nutrient Status in Soil after Harvest of Greengram

Abstract

A field study was carried out during rabi seasons in 2017-18 and 2018-19 after harvest of rice to reveal the residual effect of integrated nutrient management on nodulation, yield, quality and available nutrient status in soil after harvest of greengram at Instructional Farm of College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar. The maximum number of root nodules/plant at 30 DAS and 45 DAS in greengram (5.86, 6.19 and 12.49 and 12.94in 2017 and 2018 respectively) were recorded in the subplot treatment of 75% RDF+ rhizobium + PSB and lowest values were obtained in 75% RDF treatment. Similarly in main plot, residual effect of 50% RDF+50% RDN through FYM showed significantly higher number of root nodules/plant during both the years of study which remained at par with 75 % RDF+ Green manuring. Lowest values were obtained from only RDF treatment. Residual effect of 50 % RDF+50 % RDN through FYM showed significantly higher protein % (24.2 and 24) and protein yield (194.3 and 196.2) during both the years of study which remained at par with 75 % RDF+ Green manuring treatment. Residual effect of 75 % RDF+ Green manuring treatment recorded higher increase in soil organic carbon (4.87 g/kg), available N(225.7 kg/ha), Available P (26.2 kg/ha) and available K (296.0 kg/ha) than all other treatment combinations. The residual treatment 50% RDF+25% RDN through FYM recorded the lowest values of soil nutrient status after harvest of greengram. Similarly the sub plot treatment receiving 75% RDF+ Rhizobium+ PSB recorded significantly higher soil organic carbon (4.67 g/kg), available N(217.1 kg/ha), Available P (22.8 kg/ha) and available K (291.8 kg/ha) than 100% RDF and 75% RDF.