2006~2020年江苏省农田生态系统碳足迹分析
Carbon Footprint Analysis of Farmland Ecosystem in Jiangsu Province from 2006 to 2020

利用2006~2020年江苏省农业生产统计数据，以江苏省13个地级市为研究单元，对全省农业生态系统碳排放、碳吸收和碳足迹进行估算和分析，研究影响碳排放和碳吸收的因素，并提出对策和建议。结果表明：水稻是江苏省第一大粮食作物，同时也是农田生态系统中碳吸收第一大来源，截至2020年，其全生命周期碳吸收量达到1.59143 × 107 t，占全省农田生态系统碳吸收量的41%；农田生态系统碳足迹占同时期播种面积的比例也趋于下降，由2006年13.6%下降到2020年10.63%，即约1/10的耕地播种面积可以消纳掉农田生产产生的碳排放；江苏省农田生态系统处于碳盈余状态，2020年碳生态盈余达到了6.3258 × 106 hm2，江苏省农田生态系统的碳汇功能逐步提升。
Based on the statistical data of agricultural production in Jiangsu Province from 2006 to 2020, 13 prefecture-level cities in Jiangsu Province were used as research units to estimate and analyze the carbon emission, carbon absorption and carbon footprint of agricultural ecosystems in Jiangsu Province, study the factors affecting carbon emission and carbon absorption, and put forward coun-termeasures and suggestions. The results showed that rice was the largest grain crop in Jiangsu Province, and also the largest source of carbon uptake in farmland ecosystem. By 2020, the carbon uptake of rice during its whole life cycle reached 1.59143 × 107 t, accounting for 41% of the total carbon uptake of farmland ecosystem in Jiangsu Province. The ratio of farmland ecosystem carbon footprint to the planted area in the same period also tended to decline, from 13.6% in 2006 to 10.63% in 2020, that is, about 1/10 of the planted area could absorb the carbon emissions generated by farmland production. The farmland ecosystem of Jiangsu Province is in a state of carbon surplus, and the carbon ecological surplus reaches 6.3258 × 106 hm2 in 2020. The carbon sink function of the farmland ecosystem of Jiangsu Province is gradually improved.