为了分析有机氯农药残留沉积量受栽培条件和气候微环境影响造成的差异，采用随机区组试验方法，研究探讨了4.5%高效氯氰菊酯乳油1 600、800倍液在日光温室和露地条件下黄瓜中的残留消解特性。结果表明，在露地和日光温室栽培黄瓜上茎叶喷布4.5%高效氯氰菊酯乳油1 600、800倍液后，初始沉积量差异较大，剂量越大初始沉积量越高。露地喷药5 d和7 d后、日光温室喷药5 d后的残留量均降低到GB2763 — 2012规定的MRL值以下，符合7 d安全间隔期标准，符合蔬菜质量安全标准。2种剂量喷洒后残留量降解到最大限量标准值所需要的时间分别为露地栽培3.8 d 和4.7 d，日光温室3.0 d和4.2 d。可见，4.5%高效氯氰菊酯乳油 1 600、800倍液均可在蔬菜上应用。

To find out the deposition differences of residual organochlorine pesticides influenced by the cultivation conditions and climate microenvironment, a randomized block experiment was used to investigate the residual digestion characteristics of 4.5% cypermethrin in 1 600-fold and 800-fold solutions in cucumbers under facility and open field conditions. The experimental results indicated that the initial deposition of 4.5% efficient cypermethrin emulsifiable concentrate (1 600-fold and 800-fold solutions) on the stems and leaves of cucumber grown in open fields and facilities varied greatly. The higher the concentration, the higher the initial deposition was. After 5 and 7 days of spraying in the open field condition and 5 days after spraying in the sunlight greenhouse, the residual amount decreased to the MRL value, meeting the 7-day safety interval standard and the quality and safety of vegetables. The degradation time required for the residual amount to degrade to the maximum limit standard value after spraying at two doses was 3.8 days and 4.7 days for open field cultivation, and 3.0 days and 4.2 days for sunlight greenhouse cultivation, respectively. Therefore, 4.5% efficient cypermethrin emulsifiable concentrate could be applied to vegetables in 1 600-fold or 800-fold solution.

S642.2