Abstract

Rice agriculture interventions contribute towards the green-house gas (GHGs) emission responsible for global warming that put forward changes in climatic variables. Efforts should be made to reduce GHGs emission for restraining global warming. Keeping this in view, a field experiment was carried out to evaluate the feasibility of different management practices for mitigating the green-house gases emission from rice-based cropping sequence in strip plot design with two main plots (M1: Direct seeded rice with drum seeder followed by seed drilling greengram and M2: Transplanted rice followed by broadcasted greengram) and five sub-plots (S1: 100% of recommended dose of fertilizer (RDF) through inorganic sources, S2: 75% of RDF through inorganic sources+25% N of RDF through organic sources, S3: 50% of RDF through inorganic sources+50% N of RDF through organic sources, S4: 25% of RDF through inorganic sources+75% N of RDF through organic sources and S5: 100% of RDF through organic sources) with three replications at Kalyani, Nadia under New Alluvial Zone of West Bengal, India. After conducting two years of experiment (2011–12 and 2012–13), it was found that the DSR at kharif emitted lower CH4(1.137 mg/m2/h), CO2(1.0 mg/m2/h) and N2O (0.33 mg/m2/h) at the maturity stage of rice. Furthermore, boro rice was lower emitter of these GHGs than that from kharif rice. Lowest emission of CH4 and CO2 with the values of 1.062 and 0.172 mg/m2/h, respectively, from boro rice and 1.603 and 1.122 mg/m2/h from kharif rice was observed under 100% RDF through inorganic fertilization, whereas N2O emission was just reverse to emission of CH4 and CO2. Crop establishment through minimum soil disturbance along with 25% supplementation of inorganic fertilizer though organics could be an option to lower down GHGs emission.