摘要
为实现"双碳"目标,北京市相关规划对"十四五"时期农业领域温室气体排放控制提出严格要求.通过收集北京市农业活动水平数据,计算和筛选排放因子,评估北京市2020年农业温室气体排放量,分析排放特征;结合北京市自然条件和种养模式,筛选适宜的减排措施,预测"十四五"时期温室气体减排潜力及分布,分析优化措施减排效果,并提出相关政策建议.结果表明,北京市2020年农业温室气体排放总量(以CO_(2)-eq计,下同)为45.6万t,以动物肠道发酵和动物粪便管理排放为主,贡献率分别为50.7%和26.7%,主要集中在顺义区、密云区、延庆区等畜禽养殖规模较大的郊区;预测"十四五"期间,北京市农业温室气体减排潜力为10.7万t.动物肠道发酵为减排潜力最大的排放源(6.0万t),其次为动物粪便管理(3.7万t);CH_(4)的减排潜力大于N2 O;减排潜力主要分布在密云区、顺义区、延庆区、房山区和通州区等畜禽养殖规模较大的郊区;调整饲料结构和优化粪便管理方式为效果最明显的减排措施.
To achieve the goal of"carbon peak and neutrality,"the strict requirements for greenhouse gas(GHG)emissions control in the agricultural sector were recommended in relevant plans for Beijing during the 14th Five-Year Plan period.Through collecting agricultural activity data and calculating and screening the emission factors,the amount and emission characteristics of agricultural GHG emissions in Beijing in 2020 were estimated and set as the baseline condition.On this basis,the GHG emissions in 2025 with optimized measurements implemented,which were selected in combination with the natural conditions and planting-breeding mode of Beijing,were set as the reduction condition.The emission reduction potential and its distribution during the 14th Five-Year Plan Period were predicted simultaneously.Meanwhile,the reduction effects on the GHG emissions of optimized measurements were evaluated.In addition,relevant policy recommendations on GHG reduction were proposed accordingly.The results revealed that the total agricultural GHG emissions in Beijing were estimated to be 456000 t(CO_(2)-eq)in 2020,primarily from sources of animal intestinal fermentation and manure management,with contribution rates of 50.7%and 26.7%,respectively.Spatially,it was mainly distributed in districts with large livestock and poultry breeding scales,such as Shunyi District,Miyun District,and Yanqing District,etc.It was predicted that in 2025,the total agricultural GHG emissions would be 349000 t(CO_(2)-eq),and the emission reduction potential in the 14th Five-Year Plan period would be 107000 t(CO_(2)-eq).Animal intestinal fermentation would be the emission source with the largest reduction potential(60000 tons,CO_(2)-eq),followed by the emission source of animal manure management(37000 tons,CO_(2)-eq).Adjusting fodder composition and optimizing manure management were analyzed to be the most effective optimized measurements for agricultural GHG emission reduction.Moreover,the emission reduction potential of CH_(4) would be greater than that of N2O.
作者
杨帆
韩玉花
隗潇
毕海涛
王晓亚
YANG Fan;HAN Yu-hua;WEI Xiao;BI Hai-tao;WANG Xiao-ya(Beijing Municipal Research Institute of Eco-Environmental Protection,Beijing 100037,China;National Engineering Research Center of Urban Environmental Pollution Control,Beijing 100037,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2023年第10期5456-5463,共8页
Environmental Science
基金
北京市科学技术协会2021-2023年度青年人才托举工程项目
北京市生态环境保护科学研究院基金项目(Y2021-007)。
关键词
双碳
农业
温室气体(GHG)
排放
减排潜力
carbon peak and neutrality
agriculture
greenhouse gas(GHG)
emissions
reduction potential
