Author(s): S. Karmakar, G. Saha, R. Bhattacharya and B. Kar

Abstract: Nitrous oxide (N2O) emissions from winter wheat field were measured using closed chamber technique during 2012-2013 and 2013-2014 at Bidhan Chandra Krishi Viswavidyalaya farm (22o572 N latitude, 88o202 E longitude). Experiment was conducted taking two winter wheat varieties (K0307 and KRL-288) with two dates of sowing (15th November and 30th November) and two nutritional traits (100% inorganic and 50% organic + 50% Inorganic). The aim of the experiment was to evaluate the effect of crop eco- climate and sunshine hours on nitrous oxide emission rate from wheat field. Experimental results showed that canopy temperature and sunshine hours directly affect N2O efflux at different phenophases of wheat under different treatment combinations. Whereas during active vegetative stage variety-K0307 responded positive relation for N2O emission with canopy temperature and sunshine hours. But for both nutritional approaches similar response was observed during active vegetative stage as well as advance reproductive stage. Results imply that 1st sowing with K0307 and 100% inorganic and 50% organic + 50% inorganic fertilization had some effective responses towards microclimatic variation as well as ambient sunshine hours. Moreover, wheat productivity had some association with N2O emission rate...

Download Full Article: Click Here