Abstract:

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.