摘要
对崇明县农业2005～2009年所排放的CO2、CH4和N2O的量进行了核算,核算结果显示2005～2009年崇明县农业温室气体总量(折算为CO2)由1 038 527t上升到1 076 993t,上升比例为3.7%。其中,CO2和CH4的排放量分别从2005年的460 178t和12 039t下降到2009年的441 705t和11 686t,下降比例分别为4.0%和2.9%,但N2O的排放量则由2005年的1 050t上升到2009年的1 258t,上升比例为19.8%。N2O排放的快速增长和其巨大的增温潜力是影响崇明温室气体排放总量变化趋势的重要因素。核算结果表明,影响崇明农业温室气体排放的主要因素包括化肥使用强度过大和使用效率过低、粪便管理系统效率不高、农产品销售网络不完善等。未来崇明农业应主要从提高可再生能源利用比例和能源利用效率、实施精确施肥以降低化肥使用强度、提高畜禽粪便资源化利用率以及改善剩余农产品销售网络等方面来减少温室气体排放,从而实现可持续的低碳农业。
The amount of CO2,CH4 and N2O emitted by agriculture in Chongming from year 2005 to 2009 was accounted.The result showed that from year 2005 to 2009,the total amount(converted to CO2) of agricultural greenhouse gas(GHG)had risen from 1 038 527 t to 1 076 993 t,with a rising percentage of 3.7%.Among them,the amount of CO2 and CH4 had reduced from 460 178 t and 12 039 t in year 2005 to 441 705 t and 11 686 t in year 2009 respectively,by 4.0% and 2.9% respectively.However,the amount of N2O had risen quickly,from 1 050 t in year 2005 to 1 258 t in year 2009,with a rising percentage of 19.8%.The fast rising of N2O emission and its huge global warming potential was an important factor to effect the trend of total agricultural GHG emission in Chongming.The account result showed that the main factors which effected agricultural GHG emission in Chongming were the too high use intensity and too low use efficiency of chemical fertilizer,faulty feces management system and agricultural products sales network and so on.In the future,agriculture in Chongming should reduce the GHG emission so as to achieve sustainable low carbon agriculture mainly from the four aspects of increasing the use percentage of renewable energy and use efficiency of energy,adopting precise fertilization to reduce the use intensity of chemical fertilizer,raising the recycling percentage of poultry and animal feces,and improving the agricultural products sales network.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2012年第S2期102-108,共7页
Resources and Environment in the Yangtze Basin
基金
国家科技支撑计划"崇明低碳经济发展关键技术研究与集成应用示范"课题项目(2009BAC62B02)
上海市科委课题项目(10230712200)
中央高校基本科研业务费专项(0400219221)
关键词
崇明县农业
温室气体核算
低碳农业
agriculture in Chongming
greenhouse gas accounting
low carbon agriculture
