Vol. 10, Issue 4 (2021)

Author(s):
Vikash Kumar, MK Singh and Nikhil Raghuvanshi

Abstract:
Study of integrated nutrient management on crop growth indices in unpuddled transplanted rice in inceptisol soil was studied by conducting an experiment at Agricultural Research Farm, Banaras Hindu University, Varanasi, India. An experiment was laid out with four summer green manuring treatments viz., summer fallow, water hyacinth, dhaincha and sudan grass in main and three nitrogen management treatments viz., 60% RDN, 80% RDN, and 100% RDN replicated thrice in split plot design. The recommended dose nutrients (N-P-K-Zn) of rice as 150-75-60-5 kg/ha with two splits of nitrogen and basal application P2O5, K2O and Zn at planting was carried out for this experiment. Soil incorporation with dhaincha recorded higher crop growth indices viz., crop growth rate, relative growth rate, lower number of days taken in 50% flowering, higher number of days taken in 50% maturity, and leaf area as compared to summer fallow and sudan grass, however, it was statistically at par with water hyacinth during both the years. Application of 100% RDN (50% nitrogen through FYM and 50% nitrogen through chemical) recorded significantly highest crop growth indices which was followed by 80% RDN (50% nitrogen through FYM and 50% nitrogen through chemical) and 60% RDN (50% nitrogen through FYM and 50% nitrogen through chemical). The net assimilation rate was not significantly influenced by summer green manuring and integrated nitrogen management during both the years.