Response of split application of nitrogen on yield and nitrogen use efficiency of rice under high rainfall area of Andaman & Nicobar islands

Abstract

A Field experiment was carried out at farmer's field of Port Mout village of South Andaman district of A & N Islands during Kharif season of 2015 under a National Network Project National Innovation on Climate Resilient Agriculture to study the response of split application of nitrogen on yield and nitrogen use efficiency of rice. The results revealed that application of four split of 15 per cent at 10 DAT, 35 per cent at active tillering, 25 per cent at panicle initiation and 25 per cent at flowering stage recorded 1.60 and 2.59 q//ha of additional higher grain and straw yield as compared to other four split application of nitrogen i.e. 25 per cent at basal, 25 per cent at active tillering, 25 per cent at panicle initiation and 25 per cent at flowering stage. Net return of ₹ 27430/ha with B: C ratio of 2.02 and higher agronomic efficiency, partial factor productivity, physiological use efficiency and NPK uptake were obtained with application of nitrogen in four split of 15 per cent at 10 DAT, 35 per cent at active tillering, 25 per cent at panicle initiation and 25 per cent at flowering stage as compared to other treatments.