吉首市农业面源污染分析及控制策略

为了明确武陵山区农业面源污染状况，以吉首市为研究对象，利用输出系数法和等标污染负荷法对农业面源污染总氮（TN）、总磷（TP）负荷进行估算与分析评价.结果表明，2018年吉首市农业面源污染TN和TP负荷分别为992.698和82.887 t，相应的等标污染负荷量为9.927×108和4.148×108 m3；污染源对TN和TP负荷的贡献率从大到小依次是农业化肥、农村生活和畜禽养殖.针对吉首市农业面源污染现状，提出了合理的防治策略.

Analysis and Control Strategy of Agricultural Non-Point Source Pollution in Jishou City

In order to clarify the agricultural non-point source pollution in Wuling Mountain Area, the total nitrogen （TN） and total phosphorus （TP） pollution loads from agricultural nonpoint source pollution in Jishou city in 2018 were estimated and assessed according to the output coefficient method and the equivalent pollution load method. The results show that the TN and TP pollution loads of agricultural non-point source pollution in Jishou City are 992.698 and 82.887 t, respectively, and the corresponding equivalent pollution loads are 9.927×10⁸ and 4.148×10⁸ m³. The greatest contribution rate of pollution sources to TN and TP loads comes from agricultural fertilizer, followed by rural life and livestock and poultry farming.The research puts forward suggestions and countermeasures for the agricultural non-point source pollution in Jishou City.