摘要
农地利用变化既是重要的碳源,同时也是最主要的碳汇。碳效应测算分析表明,1993—2008年我国农地利用碳排放总量、强度年均分别增长4.08%、2.38%;化肥、农药、农膜、农用柴油、灌溉、翻耕等所产生的碳排放量年均分别递增3.45%、4.65%、7.20%、4.77%、1.22%、0.38%。2000—2008年林地碳汇量增长3.19%,而草地碳汇则呈现微弱的递减态势。农地利用方式变化的碳效应来看,2001—2008年我国因生态退耕产生碳汇年均递减45.16%,由于建设占用所引发碳排量年均递增2.23%。农地利用变化的碳效应区域差异,生态退耕碳汇效应最大是河北,最小的是黑龙江;因建设占用耕地导致碳排放效应最为显著的是江苏,最小为西藏。
The agricultural land-use change is an important carbon source,but also the most important carbon sinks.Functional analysis of carbon estimates from 1993 to 2008 shows that China’s agricultural use of carbon emissions,increased by an average intensity of 4.08%,2.38%;chemical fertilizers,pesticides,diesel oil,irrigation,tillage and other carbon emissions generated by average annual increase,respectively,3.45%,4.65%,7.20%,4.77%,1.22%,0.38%.2000-2008 forest carbon sinks grew 3.19%,while the grass is showing a weak carbon sink decreasing trend.Agricultural land use change in the way of the carbon effects of view of China from 2001 to 2008,due to ecological restoration produced an average annual decrease 45.16% carbon,due to the occupation of the average annual increase of carbon emissions caused by 2.23%.Agricultural land use change effects of regional differences in carbon,ecological restoration is the largest carbon sink effect of Hebei,Heilongjiang is the smallest;farmland for the construction of carbon emissions leading to the most significant effect of Jiangsu,the smallest for Tibet.
出处
《经济地理》
CSSCI
北大核心
2012年第7期135-140,共6页
Economic Geography
基金
教育部人文社会科学项目(12YJC790089)
中南民族大学中央高校专项基金项目(CZQ11029)
关键词
农地利用
碳功能
生态退耕
建设占用
agricultural land use
carbon functions
ecological restoration
the occupation of
