摘要
研究了在自然条件下施用溴氰菊酯混配农药——大地西对稻田-鱼塘水生生态系的影响。结果表明,在稻田中施用时,由于实际用量低,加上作物的沾附、土壤与水体中悬浮物的吸附及其存在形态的变化,其实际浓度与毒性已降低到对稻田养鱼及邻近鱼塘的水生生物不再有危害的程度。描述了溴氰菊酯在整个模拟生态系中的迁移与消减规律。研究了溴氰菊酯在不同加工剂型中的存在形态,以及在鱼体内的吸收与分布特点及其与毒性的关系。
The effects of Dadeci (deltamethrin mix-fbrmulated pesticide) on a rice field-fish pond aquatic ecosystem were studied. Owing to the low application dose, the adhering effect of the plants, the adsorption on suspended matter and soil and the transformation of the pesticide, the actual conce- ntrations of deltamethrin in water of the rice field and the surrounding fish ponds decreased to such a level that no harmful effects on fishes could be found. The transportion, the degradation and the transformation of the pesticide in the aquatic system, the toxicity related distribution and frac-tionation of deltamethrin in fish body were studied and discussed as well.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1989年第2期176-182,共7页
Acta Scientiae Circumstantiae
