Impact of chlorophyll meter based nitrogen application in rice Oryza sativa L under different establishment methods

Abstract

Nitrogen is one of the most limiting fertilizer nutrient for achieving high yield of rice. Urea is the widely used source of fertilizer N for rice crop production in India. The inefficient splitting of N doses and improper application lowers the N use efficiency (NUE) and the crop recovers only 30-40 % of applied N. Results from multi location trials have revealed that proper N management may or may not improve the crop yield when compared with farmers practice but can reduce the N application rate by about 20-25 % and hence increases the NUE. Need based N management using SPAD meter not only increases the NUE and yield of rice but also help in maintaining environmental sustainability. With this in view, the present investigation Impact of chlorophyll meter based nitrogen application in rice (Oryza sativa L.) under different establishment methods was carried out during kharif seasons of 2016 and 2017 at the research farm of Bihar Agricultural University, Sabour. newline