灌区农田温室气体减排潜力研究——以江苏省濉汴河灌区为例

Research on the greenhouse gas emission reduction potential in agricultural fields of irrigation districts--A case study of the Suibianhe River irigation district in Jiangsu Province

农业生产活动具有碳源和碳汇的双重效应,为研究濉汴河灌区温室气体减排潜力,对灌区采取适当的减排固碳措施提供依据和建议,分别从稻田CH_(4)排放、农用地N_(2)O排放、农用柴油CO_(2)排放、排灌电力生产造成的CO_(2)排放以及作物生长季碳通量等方面,估算灌区2021年温室气体排放量和吸收量,并针对相关指标进行敏感性分析,研究分析其对灌区温室气体排放量的影响程度。结果表明:濉汴河灌区2021年温室气体净排放量约为7.21万t CO_(2)当量,且主要的排放组成是农田释放的CH_(4)和N_(2)O。

Io assess the greenhouse gas emission reduction potential in the Suibianhe River irrigation district and provide recommendations for appropriate emission reduction and carbon sequestration mea-sures,this study focuses on estimating the greenhouse gas emissions and absorption in the district for the year 2021.Various aspects are considered,including CH_(4) emissions from rice fie1ds,N_(2)O emis-sions from agricultural 1and,CO_(2) emissions from agricultural diese1 use,CO_(2) emissions from pumping and irrigation electricity production,and carbon f1ux during the crop growing season.Sensitivity.analysis is conducted to assess the impact of re1evant indicators on greenhouse gas emissions in the district.The results indicate that the net greenhouse gas emissions in the Suibianhe River irrigation district in 2021 were approximately 72,100 tons of CO_(2) equivalent.The primary components of emissions were CH_(4) and N_(2)O released from agricultural fields.