利用生化提取物降解小白菜中的氯氰菊酯残留

DEGRADATION OF CYPERMETHRIN RESIDUE IN PAKCHOI CABBAGE (BRASSICA PARICHINENSIS) WITH BIOCHEMICAL EXTRACTS

为了探讨降解农药残留的新途径，采用生化提取物处理喷洒过氯氰菊酯农药的白菜，通过气相色谱法测定白菜中氯氰菊酯的残留量，同时进行了试管内生化提取物与氯氰菊酯农药直接作用的实验，以此观察生化提取物对氰菊酯农药的降解情况。结果表明，生化提取物对小白菜中的氯氰菊酯农药残留具有显著降解作用，实验范围内的降解率为12．38％-57．19％，降解率随制剂浓度的增加而增高。试管试验结果与生化提取物处理蔬菜的试验相似，降解率为27．19％～29．07％。生化提取物降解氯氰菊酯农药残留的作用机理可能与生化提取物中的包括降解酶在内的多种生化成分有关。

Extracts from worms, microbes and plants were foliar applied to pakehoi cabbage （Brassica parichinensis） originally sprayed with cypermethrin, to study their effects on the degradation of the residue of the pesticide in the plants. A direct reaction between the extracts with cypennethrin in test tubes was observed. Gas chromatographic determination showed that these extracts helped the biodegradation of the pesticide, the degradation rate ranging from 12.38% to 57.19% and increasing with their concentrations. Similar results were obtained in the test-tube experiment, with a degradation percentage of 27.19% - 29.07%. The meehanisms for the degradation activity of the extracts for eypermethrin may be related to the biochemical components, including degradation enzymes, in the extracts.