Organic Manures and Crop Residues as Fertilizer Substitutes: Impact on Nitrous Oxide Emission, Plant Growth and Grain Yield in Pre-Monsoon Rice Cropping System

摘要: It has been previously argued that application of organic residues added in soils a great impact on soil quality, grain productivity as well greenhouse gas emissions. Substitution chemical fertilizers become common practice agricultural systems which consequently affect the emissions from fields. To observe effects manures and crop amendments, five fertilizer treatments including conventional inorganic nitrogen fertilizer—NPK, cow manure, rice straw, poultry manure sugarcane bagasse were applied field for two consecutive pre-monsoon seasons. Addition decreased cumulative N2O by 14% 31%, 1% 7% 5% 3% 2012 2013 respectively when compared with treatment (NPK) both Yield differences not significant (p > 0.005) amongst treatments, however, slight increase was observed due to straw amendment over control. Soil carbon 11% - 17% under might have contributed lower plots. Results equivalent emission (CEE) efficiency ratio (CER) indicated incorporation during season had potential reduce yield scaled production at level than farmers’ using (NPK).