Estimation of greenhouse gas emissions from croplands in Yangtze River Delta
The emissions of methane(CH4)and nitrous oxide(N2O)from croplands in the Yangtze River Delta(YRD)in 2018 were estimated via CH4MOD model and emission factor method,and their temporal and spatial dis-tributions were further analyzed to establish 1 km×1 km grid greenhouse gas emission inventory.The results show that,the CH4 emission factor of paddy field was 348.54 kg/hm2 and N2O emission factor of croplands was 0.95 kg/hm2 in the YRD,which were consistent with previous research results.In 2018,1.769 million tons of CH4(equivalent to 37.149 million tons of CO2)were discharged from paddy fields in the YRD,with single-season paddy fields as the main contributor;while the croplands in the YRD emitted 15 114.9 tons of N2O(equivalent to 4.504 million tons of CO2)to the air,with wheat land as the biggest contributor.Jiangsu and Anhui provinces con-tributed most to the CH4 and N2O emissions,especially during April to August.It is suggested to reduce cropland ni-trogen input thus mitigate agricultural greenhouse gas emissions.
cropsgreenhouse gasemission inventorytemporal and spatial distributionYangtze River Delta(YRD)
万方数据
维普
