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稻田使用水溶性农药的渗滤流失、降雨径流流失和主动排水流失比例很高,在水稻生长前期甚至高达50%。因稻田种植面积大和水溶性农药用量
The infiltration loss, the loss of runoff from rainfall and the loss of active drainage by paddy fields using water-soluble pesticides are very high, reaching as high as 50% in the early stage of rice growth. Because of paddy cultivation area and the amount of water-soluble pesticides