Asisan Minz*, Neha Kumari and Rooplal Prasad
Department of Soil Science and Agricultural Chemistry, Birsa Agricultural University, Kanke, Ranchi, (Jharkhand)
Email: assi.minz@gmail.com
Received-06.07.2017, Revised-19.07.2017
Abstract: A field experiment was conducted to study the effect of different rate of nitrogen application on GHGs emission under maize-wheat cropping system in an acid soil. Nitrogen rates were arranged with four levels including (N1: 0, N2 : 80, N3 : 160 and N4 : 240 kg N ha-1) in case of maize. However in case of wheat N rates was (N1 = 0, N2 = 50, N3 =100 and N4=150 kg N ha-1). GHGs were estimated by using Cool Farm Tool (CFT), and the result showed that the application of higher dose of N, emitted more total GHGs (11163 kg CO2eq ha-1 in maize and 7108 kg CO2eq ha-1 in wheat, respectively. Similar trend was followed by emission of N2O and CO2. A breakdown of various emission sources shows that the major emission sources at farm level is the production and use of synthetic fertilizer. GHGs emission increased with increasing N application both maize and wheat crop and was observed highest at highest N application rate i.e. 240 kg N ha-1 and 150 kg N ha-1 (11163 and 7108 kg CO2eq ha-1, respectively) and lowest at no nitrogen applied plot (1941 and 2124 kg CO2eq ha-1) respectively.
Keywords: Carbon dioxide, Cool Farm Tool, Nitrogen fertilizer, Nitrous oxide, Maize-wheat
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