农业不仅是工业污染的受害者。而且,其本身造成的水资源污染也在日益加剧。农业生产活动中使用的化肥、杀虫剂、除草剂等化学品都能对水资源造成污染。其中以硝酸盐的污染最为严重。目前,硝酸盐的污染主要来自企业生产中广泛、大量使用的氮肥。虽然硝酸盐是植物维持生命不可缺少的元素,但是,毫无节制地使用化肥会使土壤中硝酸盐的含量 Agriculture is not only a victim of industrial pollution. Moreover, the water pollution caused by itself is also getting worse. Chemicals such as fertilizers, pesticides and herbicides used in agricultural activities can cause pollution to water resources. Among them, the nitrate pollution is the most serious. At present, the nitrate pollution mainly comes from the extensive and heavily used nitrogenous fertilizer produced by enterprises. Although nitrate is an indispensable element of plant life, the uncontrolled use of fertilizers can lead to the nitrates in the soil