近年来,随着工农业生产迅速发展,化学农药的生产和使用日益广泛,数量逐年增多。有些国家因长期使用农药,残留毒物污染土壤、水源,甚至在人畜体内积累,引起中毒,农药公害问题日益突出。据国外报道,目前汞、铜制剂和六六六、滴滴涕等农药的残留毒物已遍及粮食、水果、蔬菜、肉、蛋、鱼、牛奶等农畜产品,由于人们长期食用有残留毒物的农 In recent years, with the rapid development of industrial and agricultural production, the production and use of chemical pesticides are increasingly widespread, and the number has been increasing year by year. In some countries, due to the long-term use of pesticides, residual toxicants pollute the soil and water sources, and even accumulate in human and livestock, resulting in poisoning. The problem of pesticide pollution is becoming increasingly prominent. According to foreign reports, at present, residual toxicants such as mercury, copper preparations and pesticides such as BHC and DDT have spread to farmed products such as grain, fruits, vegetables, meat, eggs, fish and milk. Because of long-term consumption of pesticide with residual toxicants