研究标记农药归宿的微型模拟生态系统(英文)

A Mini Model Ecosystem about the Fate of Labeled Pesticides

建立了１种适合于研究标记农药归宿的微型模拟生态系统．该系统集中在１闪烁瓶内，瓶中置１玻璃试管，管内装入１ｍＬ水和０．５ｍＬ沉积物以及标记农药．试管上置聚氨酯棉花吸收挥发物，生物代谢产生的１４ＣＯ２由闪烁瓶中的ＮａＯＨ吸收．利用这一系统研究了ＤＤＴ，六六六，毒死蜱，敌百虫，久效磷，杀灭菊酯，杀虫脒。

A mini model ecosystem inside a vial to study the fate of labeled pesticides was developed. In this new system, the ecosystem was limited in a 3 mL test tube (1 mL water and 05 g sediment) with labeled pesticide. Volatile compounds were trapped by polyurethane cotton which was placed above the test tube.14CO2 released from the ecosystem would be absorbed by NaOH in the bottom of the vial. A comparative study of the fate of 9 labeled pesticides,14CDDT,14CBHC, 14Cchlopyrifos,14Ctrichlorphon,14Cmono crotophos14Cfenvalerate, 14Cchlordimeform,14Cbensulfuron methyl, and 14Cchlorsulfuron, in marine mini model ecosystem was conducted.