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长期以来农药的使用,一方面造福于人类,功不可没;另一方面也给人类赖以生存的环境带来危害。据文献报道,农药利用率一般为10%,约90%残留在环境中,这个数字是十分惊人的。过多地使用农药,大量未被利用的农药经过降雨、农田渗漏和水田排水等进入水体,对地下、地表水体造成污染,破坏水生生态系统。
The long-term use of pesticides, on the one hand for the benefit of mankind, contributed to; on the other hand also to the environment on which human beings harm. According to the literature, pesticide utilization is generally 10%, about 90% remain in the environment, this figure is very alarming. Excessive use of pesticides, a large number of unused pesticides through the rain, farmland leakage and paddy field drainage into the water, causing pollution of subsurface water and surface water, destruction of aquatic ecosystems.