论文部分内容阅读
[目的]研究溴虫腈、毒死蜱、氯氰菊酯、灭多威与甲霜灵混合后对其光解效应的影响。[方法]以紫外灯为模拟光源,用一级动力学方程来描述光降解效应。[结果]甲霜灵与供试农药等剂量混合时,溴虫腈和灭多威表现出光敏化降解效应;而毒死蜱和氯氰菊酯则表现为光猝灭降解效应。与不同剂量农药混合时,溴虫腈和氯氰菊酯对甲霜灵的光敏(猝灭)效率与剂量呈正相关、而毒死蜱和灭多威与剂量呈负相关。[结论]供试农药对甲霜灵的光化学降解效应与剂量以及农药品种相关。
[Objective] The research aimed to study the photodegradation effects of chlorfenapyr, chlorpyrifos, cypermethrin and methomyl mixed with metalaxyl. [Method] With UV lamp as simulation light source, first-order kinetic equation was used to describe photodegradation effect. [Result] Chlorfenapyr and methomyl showed photo-sensitized degradation effect when metalaxyl was mixed with the tested pesticides, while chlorpyrifos and cypermethrin exhibited photochemical quenching effect. When mixed with different doses of pesticides, the photodynamic (quenching) efficiency of chlorfenapyr and cypermethrin to metalaxyl was positively correlated with dose, while the dose of chlorpyrifos and methomyl was negatively correlated with dose. [Conclusion] The photochemical degradation effects of test pesticides on metalaxyl were related to the dosage and the varieties of pesticides.