Influence of integrated nutrient management on dry matter accumulation and days taken for onset of different phenophases of direct seeded rice (Oryza sativa)

A field experiment on direct seeded rice was conducted during kharif 2017 and 2018 at Rice Research Farm, Birsa Agricultural University, Kanke, and Ranchi to evaluate the effect of integrated nutrient management in direct seeded rice (Oryza sativa). The soil was clay loam in texture, acidic in nature with mean pH 5.97, mean EC 0.30, low in available N (mean value 223.81 kg/ha), medium in P (mean value 23.35 kg/ha) & K (mean value 169.44 kg/ha) and low in organic carbon (mean value 0.39%). The experiment comprised ten treatments viz. control (no fertilizer or manure), 50% RDF, 75% RDF, 100% RDF, 50% RDF +50% N through FYM, 50% RDF + 50% N through vermi compost, 75% RDF +25% N through FYM, 75% RDF+25% N through vermi compost, 100% RDF +25% N through FYM and 100% RDF +25% N through vermi compost were laid out in randomized block design with three replications. The experiment was conducted in Randomized Block Design (RBD). Pooled data of two years experimentation indicated that the application of various integrated nutrient management practices significantly increased dry matter accumulation on 30 DAS, 60 DAS, and 90 DAS and at maturity but days taken to maximum tillering, 50% flowering and maturity of rice had not been significantly influenced. Among all treatments, application of 100% RDF + 25% N through VC resulted in higher dry matter accumulation on 30 DAT (159.5 g/m2), 60 DAT (394.1 g/m2), 90 DAT (916.4 g/m2) and at maturity (1200.5 g/m2) which was superior to rest of the treatments. Two year study indicates that the application of 100% RDF + 25% N through VC was the best for higher dry matter accumulation and yield from rice.