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农药对防治农业病、虫、草害和其它有害生物,促进农业生产,保证农业丰收具有很重要的作用。但是,农药又是一种有毒的化学物质,由于滥用农药也会给环境、人类和农畜产品带来一定的污染。据环保材料:真正作用于农业害虫的农药量仅占用量的10—30％左右,进入大气、水体的约为20—30％,残留在土壤中大约50—60％。农药漂浮在空中污染大气,降落在地面,除一部分挥发、分解、消失外,大部分通过降水、灌溉、耕作进入土壤中残留。有些农药通过拌种、穴施、喷洒直接进入土壤和植物体内残留。通过生物浓缩和食物链的传递,形成可能性的农副产品和人体内累积而影响人、畜健康。
Pesticides play an important role in preventing and controlling agricultural diseases, pests, grass pests and other pests, promoting agricultural production and ensuring agricultural harvest. However, pesticide is another kind of toxic chemical substance. It will also pollute the environment, human beings and livestock products due to the abuse of pesticide. According to the environmental protection material: the amount of pesticide that really acts on agricultural pests accounts for only about 10-30% of the amount, about 20-30% of the water entering the atmosphere and about 50-60% of the soil remaining. Pesticides floating in the air pollution of the atmosphere, landing on the ground, in addition to some volatile, decomposition, disappear, most of the precipitation, irrigation, tillage into the soil residue. Some pesticides by dressing seed, Shi Shi, spraying directly into the soil and plant residues. By bioconcentration and food chain transfer, the formation of the possibility of agricultural and sideline products and the accumulation of human and affect people and livestock health.