作　　者： ; ; ;

机构地区： 华南农业大学农学院

出　　处： 《广东农业科学》 2014年第8期198-201,共4页

摘　　要： 以1992—2011年广东省21个地区农作物产量、农作物播种面积、种植面积、农业投入等相关数据为依据,对全省农田生态系统碳源汇进行了估算分析,并研究了农田生态系统碳源汇的影响因素。结果表明:20年来广东省农田生态系统碳吸收总量总体呈现逐步下降趋势,其中粮食作物和经济作物的碳吸收量波动下降,果蔬作物碳吸收量显著增加;农田生态系统碳排放量呈现逐渐增加的趋势,其中化肥、农药等农用化学品投入带来的碳排放所占比例最大。广东省农田生态系统碳排放量远远小于碳吸收量,农田作物具有较强的碳吸收功能,表现为明显的碳汇。从分布格局来讲,不同区域之间的碳排放量和碳吸收量差异很大。 On the base of the statistical data of crop output, crop sewn area, planting area and agricultural input in 21 zones of Guangdong during 1992 to 2011, this paper estimated carbon source and sink of Guangdong farmland ecosystem and studied the influente factors of carbon source and sink of farmland ecosystem. The results indicated that the total amount of carbon absorption in Guangdong farmland ecosystem presented a gradual decline during the two decades. The amount of carbon absorption of vegetables and fruits increased obviously. The total amount of carbon emission gradually increased, among which the amount of carbon emission caused by such agricultural chemicals as fertilizer, pesticide took the highest percentage. The amount of carbon emission was far less than that of carbon absorption in Guangdong farmland ecosystem. Crops had strong carbon absorbing function, represented obvious carbon sink. From the aspect of distribution pattern, the amount of carbon emission and carbon absorption diversed among various oarts of Guan^don~.

关 键 词： 农田生态系统 碳源 碳汇 碳吸收 碳排放 时空变化

领　　域： [农业科学]