水溶性农药流失的影响因素及污染防治

根据实际室和田间试验结果，分析了水溶性农药稻田流失的影响因素，提出了对水稻生长前期的农药渗滤量、降雨径流量和排水流失量的估算。结果表明，仅渗滤与排水两项流失，占农药用量的１７．２８％～５９．３１％，调查表明，环境水体已受杀虫单的污染，最后提出了防治水溶性农药稻田流失的节水灌溉，控制排水等措施。

Affecting Factors and Pollution Prevention and Control of Water Soluble Pesticides in Rice Field Draining Loss

Based on the results of laboratory and field tests, to analyze the factors which affecting draining loss of water soluble pesticides in rice field and calculate the amount of draining loss of rice field percolation, rain runoff and rice field drainage of these pesticides in eraly stage of rice growth. The result showed that only draining loss of both percolation and runoff was 17.28% ~ 59.31% of pesticide applied amount. Detection result demonstrated that environmental water bodies were polluted by molosultap. Finally, this study proposed comprehensive harness measures, as improving structure of pesticides application, carrying out economical irrigation and controlling drainage time.