水的面源污染越来越严重,因而人们对农业生产实践对水质的影响便越来越关注.过去,人们相信通过耕作可以提高土壤生产力;然而,耕作后农田侵蚀量的增加使得对耕作的必要性产生了怀疑.在自然条件下,化学肥料和农药等可与被侵蚀的土壤一起通过径流而流失,从而降低水 As surface water pollution is becoming more and more serious, people are increasingly concerned about the impact of agricultural practices on water quality. In the past, it was believed that soil productivity could be increased through farming; however, The need for doubt has arisen that under natural conditions chemical fertilizers and pesticides can be run off by runoff along with eroded soil to reduce water