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[目的]明确杀虫剂在水稻上的使用剂量、时期和次数与糙米、稻壳和稻秆中农药残留水平的关系。[方法]供试农药为阿维菌素、虫螨腈、吡蚜酮和茚虫威,田间小区设置施药剂量为推荐剂量及其1.5倍,施药次数为2、3次,采收间隔期为14、21 d,调查糙米、稻壳和稻秆中4种农药的残留水平。[结果]糙米中4种农药的残留水平为<0.001～0.04 mg/kg,稻壳中0.002～0.32 mg/kg,稻秆中0.001～0.12 mg/kg。[结论]施药剂量越大、次数越多、采收间隔期越短,农药的残留水平越高;农药的应用时期会影响其残留水平;稻壳和稻秆中承载了大部分的农药残留,稻壳中4种农药的残留水平均高于稻秆。
[Objective] The purpose of this study was to determine the dose, period and number of insecticides on rice and the relationship between pesticide residues in brown rice, rice husk and rice straw. [Method] The tested pesticides were abamectin, chlorfenapyr, pymetrozine and indoxacarb. The recommended dosage and the recommended dose for field plot setting were 1.5 times and 2, 3 times respectively. The harvest interval The period of 14,21 d, to investigate the brown rice, rice husk and rice straw four kinds of pesticide residues. [Result] The residual levels of four pesticides in brown rice were <0.001-0.04 mg / kg, 0.002-0.32 mg / kg in rice husk and 0.001-0.12 mg / kg in rice straw. [Conclusion] The larger the dose was, the more the number was, the shorter the harvest interval was, and the higher the residual level of pesticide was. The pesticide application period would affect its residual level. Most of pesticide residues were contained in rice husk and rice straw , The residual levels of four pesticides in rice husk were higher than that of rice straw.