河南省农田生态系统碳源/碳汇及其碳足迹动态变化

Dynamic Change of Carbon Source/Sink and Carbon Footprint of Farmland Ecosystem in Henan Province

为定量测算河南省农田生态系统的碳源/碳汇,识别河南省农业发展过程中重要碳排放源,推进河南绿色农业发展。本研究对2000~2017年河南省农田的碳吸收量、碳排放量及碳足迹进行测算,并对其动态变化进行分析。结果发现:河南省农田生态系统的碳吸收量明显高于碳排放量,表明河南省农田生态系统具备较强的碳汇能力;粮食作物对总碳吸收量贡献最大,化肥是影响农业碳排放的最关键因子;河南省农田生态系统处于碳生态盈余的状态,且碳足迹较低,碳足迹效益较高。

In order to quantitatively measure the carbon source/sink of farmland ecosystem in Henan Province, identify the important carbon emission sources in the process of agricultural development in Henan Province, and promote the development of green agriculture in Henan Province. In this paper, the carbon absorption, emission and carbon footprint of farmland in Henan Province from 2000 to 2017 were measured and their dynamic changes were analyzed. The results showed that the carbon uptake of farmland ecosystem in Henan Province was significantly higher than that of carbon emissions, which indicated that the farmland ecosystem in Henan Province had a strong carbon sink capacity;food crops contributed the most to total carbon uptake, and chemical fertilizer was the key factor affecting agricultural carbon emissions;the farmland ecosystem in Henan Province was in the form of carbon ecological surplus. The carbon footprint is low and the benefit of carbon footprint is high.