大连市农用地非CO_2温室气体排放量估算及防控对策

Estimation of Non-CO_2 Greenhouse Gas Emissions of Agricultural Land in Dalian City and Control Countermeasure

基于中国编制的《省级温室气体清单编制指南》中的农业碳排放量的估算方法对大连市近12年(2001—2012年)的农用地甲烷及氮氧化物排放量进行估算,并折算成二氧化碳当量。经计算可以看出,大连市稻田甲烷的CO2排放当量由2001年的46 344 t增加到2012年的97 704 t,增加了110.8%;农用地N2O和CO2排放当量在波动中增长,2012年为360 488 t,12年来增加了3.2%,涨幅不大。化肥施用量过量、不合理及秸秆利用率低、利用方式简单是妨碍低碳农业发展的主要因素,据此提出了相应的防控对策。

Based on the estimation methods of agricultural carbon emissions from ＂provincial greenhouse gas inventory guidelines＂ established by China,agricultural methane and nitrogen oxide emissions quantity of Dalian City during recent 12 years（2001-2012） were estimated and converted into CO2 equivalent. Through calculation,it＇s indicated methane CO2 equivalent emissions of Dalian City increased by 110.8% ,which reached 97 704 tons in 2012 from 46 344 tons in 2001. N2O and CO2 equivalent emissions of agricultural land grew in fluctuation,which was 360 488 tons in 2012,and increased by 3.2% during 12 years. The utilization of chemical fertilizer was excessive and unreasonable,the utilization rate of straw was low, and the utilization of straw was simple, which hindered the development of low-carbon agriculture.