扬州市邗江区农业面源污染现状与对策浅析

Situation of Agricultural Non-point Pollution and Countermeasures in Hanjiang District, Yangzhou City

为全面了解和掌握邗江区农业面源污染现状和成因,采用综合调查的方法,研究邗江区13个乡镇区域内各类农业污染源的产生与排放,并对污染现状进行评价。结果表明,在该区域内氮磷钾总投入量为15835.5t,畜禽养殖业污水日产量为68.85t,水产养殖水面使用药物为79.5kg/hm2,是区域内水体富营养化风险的主要构成因子,也是农业面源污染防控的重点。并针对农业面源污染的特点,提出相应的防治对策。

In this study, the authors comprehensive investigated the agricultural non-point pollution for Hanjiang district, summed up the situation of the agricultural non-point pollution and analyzed the reason of the agricultural non-point pollution occurrence. The results showed that, the main agricultural NPS pollutants were： in the area of NPK total investment to amount to 15835.5 t, livestock and poultry aquaculture wastewater output was 68.85 t, aquaculture water use of medication for 79.5 kg/hm2. Indicating that loss of N and P from planting might be the main factor leading to water body eutrophication, which was suggested to be the key for agricultural non-point pollution prevention and controlling. In the end, it had proposed the countermeasures of the agricultural non-point pollution, which had both academic and realistic meaning to control agricultural non-point source pollution.