巢湖流域农田生态系统磷代谢分析

采用物质流分析方法,建立巢湖流域农业种植系统的静态磷代谢分析模型,结合统计数据和文献参数,估算了2008年巢湖流域农田生态系统排水含磷来源分配以及流域各县(市)农田生态系统排水的磷含量.结果表明,巢湖流域整个农田生态系统的排向水体的含磷总量为14125.1158t,其中化肥和还田畜禽粪便是巢湖流域农田生态系统磷输入的主要来源,其排入水体的含磷总量分别为37172.0944t和26230.2336t;而肥西县与合肥市辖区是农田种植对水环境影响最大的区域,其农田生态系统排水含磷总量分别为4077.6575t和2849.133t.

Phosphorus flow analysis of agricultural ecosystem in Chaohu Watershed

By implementing the method of substance flow analysis, the paper developed a static phosphorus flow analysis model of agricultural ecosystem in Chaohu Watershed, and then evaluated the phosphorus losing to water of the agricultural ecosystem of every phosphorus source and county in the watershed in 2008 with statistics and literatures. The total phosphorus losing to water of agricultural ecosystem in Chaohu Watershed in 2008 was 14125.1158t, which was mainly originated from chemical fertilizers (37172.0944t) and livestock excrement applied to farmland (26230.2336t). While Feixi County and Hefei City were the two regions, in which the phosphorus losing to water of agricultural ecosystem (4077.6575t and 2849.133t) mostly impact the surrounding water environment.