Regional farmland ecosystem's carbon pool function has certain promoting effect of city's low-carbon development. By using the data of carbon emission, carbon absorption, carbon source and carbon footprint of farm land ecosystem from 2006 to 2015 in Nanjing, the results showed: (1) The ability of carbon sink was increasing slowly in Nanjing. (2) Energy consumption carbon emissions in Nanjing were increasing rapidly. (3)The increase trend of carbon sink in farmland of Nanjing was less than that increasing trend of energy carbon source, and the compensatory ability of farmland carbon sink to energy source was weakening. The research provided a scientific basis for the construction and development of low carbon cities in Nanjing.%区域农田生态系统发挥碳库的功能对城市的低碳发展具有一定的促进作用.通过对2006~2015年南京农田生态系统的碳排放、碳吸收、碳汇和碳足迹的变化进行研究及特征分析,结果表明:(1)南京农田生态系统碳汇呈缓慢增加趋势;(2)南京能源消费碳排放呈快速增长;(3)南京农田碳汇的增加趋势远小于能源碳源的增加趋势,农田碳汇对能源碳源的补偿能力在减弱.研究为南京低碳城市的建设与发展提供科学依据.
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