Growth and Yield of Rice as Influenced by Nitrogen and Water Management Approaches

Abstract

Achieving sustainability of the rice production in the irrigated areas in eastern India in general and Odisha in particular, under progressive climate change and variability, necessitates adoption of practices and technologies that increase food production, adaptation and mitigation in a feasible way. A field experiment was carried out for two consecutive years during 2020-21 and 2021-22 with kharif rice in the research farm of OUAT, Bhubaneswar. The experiment was conducted in a strip plot design having four each of water and nitrogen management approaches replicated four times. All the growth attributes like plant height, tillers/hill, LAI and dry matter production were superior under 3DADPW and INM treatments in water and nitrogen management approaches, respectively. Rotational irrigation 3 DADPW in rice resulted in higher grain yield (5.28 t/ha) followed by soil saturation. Similarly, INM practices comprising of Green manuring + 75% STBNR produced higher grain yield (5.45 t/ha) as compared to other N-management options and was closely followed by STBNR.