Abstract:

 Consumption of fertilizers，pesticides，energy，as well as soil plowing in agricultural production led to substantial agricultural carbon emissions，which approximately accounted for 17% of the total greenhouse gases emissions in China Subsequently，agricultural carbon emissions played an important role in global climate change，and agricultural carbon mitigation was necessary for the government s coping with climate change So far，researches on agricultural carbon emissions concentrated on province scale，few data were available for county scale In this study，agricultural carbon emission related data of 80 counties were firstly collected from Jiangxi statistical yearbook，and then countybased agricultural carbon emission was assessed using coefficient of carbon conversion The objective of this study was to clarify spatial and temporal variations of county based agricultural carbon emissions and associated effect factors in Jiangxi Province The results showed that agricultural carbon emissions remained low in Jiangxi Province From 2000 to 2010，its agricultural emissions increased from 23085×104 t to 29051×104 t All the other years witnessed a steady increase except for 2003 The two main sources of agricultural carbon emissions were the use of chemical fertilizer and the application of agricultural machine accounting for 4149%-4436% and 3097%-4032% respectively Agricultural carbon emissions had a significant characteristic of spatial concentrations in Jiangxi Province，because all high emissionszone concentrated around the Poyang Lake in the main years Taking 2010 as an example，the top five counties were Yugan，Nanchang，Poyang，Fengcheng and Gaoan due to flat topography and wide stretch of farmland Most of the carbon emission intensity was the secondary level The distribution of its high values was relatively discrete and it was also more balanced than carbon emissions in overall spatial distribution The absolute and relative differences of agricultural carbon emissions both had a trend of gradually enlarging with volatility among counties in Jiangxi Province，while the differences of its intensity had a more apparent increasing trend Production efficiency，agricultural structure and labor force had a inhibitory action on agricultural carbon emissions，labor force>production efficiency>agricultural structure，while the development of agriculture had a promotive effect，〖JP2〗with cumulative contributes up to 994% （2294×104 t）.〖JP〗 In addition，the factors of society，policy，etc also played a role in agricultural carbon emission Finally，we summarized the main problems during the development of lowcarbon agriculture in Jiangxi and gave some suggestions