我国是农药使用大国，每年防治病、虫、草、鼠害面积达２．６７亿ｈｍ２次，所挽回粮食、棉花、蔬菜、果品损失可以解决１亿人口的吃饭、穿衣问题。农药的使用对我国农业发展起了巨大的作用，但同时又给农产品的安全带来严重的问题。在引起农产品污染的农药、重金属和亚硝酸等 China is a large country that uses pesticides. The annual area of ​​disease prevention, prevention and control of insects, weeds and rodents is 267 million hm2. The loss of grain, cotton, vegetables and fruits that can be recovered can solve the problem of feeding and dressing 100 million people. The use of pesticides has played a huge role in the development of agriculture in our country, but at the same time, it has brought serious problems to the safety of agricultural products. Pesticides, heavy metals and nitrous acid that cause pollution of agricultural products