• 关键词：蚯蚓  甲胺磷  乙草胺  铜  复合污染  生态毒性  环境安全

• 基金项目：国家杰出青年科学基金(20225722);中国科学院知识创新工程重要方向项目(KZCX2-SW-416)

• 梁继东
• 1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳 110016; 2. 西安交通大学环境与化工学院,西安 710049

• 周启星
• 中国科学院沈阳应用生态研究所陆地生态过程重点实验室,沈阳 110016

• 摘要：以黑土为环境介质,通过急性毒性试验法研究了东北黑土区普遍存在的2种农用化学品甲胺磷和乙草胺与重金属Cu对赤子爱胜蚓(Eiseniafoetida)的单一与复合毒性效应.单一毒性试验结果表明,3者对蚯蚓均有毒性,顺序为甲胺磷>乙草胺>Cu.复合毒性实验结果表明,2种有机农药与重金属Cu复合毒性效应十分复杂,与不同的浓度组合及染毒历时有关,一般随时间的延长,毒性加剧.2种有机农药通过不同途径毒害蚯蚓,复合毒性效应表现为协同作用.可见,3者对土壤生态系统环境安全性和土壤健康质量存在潜在危害,同时这几种污染物的共存进一步加大了潜在危害性,且复合毒性效应与各组浓度组合及污染暴露时间密切相关.

• Abstract：Taking phaiozem as a tested soil, the earthworm Eisenia foetida was exposed to single and binarily-combined contamination of methamidophos, acetochlor and copper (Cu). The single toxicity test for single pollutant showed that the three chemicals has the following ranking of toxicity to earthworms: methamidophos>acetochlor>Cu. Joint toxic effects of either organic pesticide combined with Cu was very complicated and related with various combinations and different exposure time. Joint toxic effects of these two organic pesticides were synergism and also related to various concentration combinations of the two pollutants in the soil and to different exposure time. The three pollutants are thus dangerous to soil ecosystems and soil-health quality. When the chemicals in the same soil environment act with other chemicals, they could boost up the potential danger of soil ecosystems contaminated by the three pollutants.

• Key words：earthworm  methamidophos  acetochlor  copper  combined pollution  ecotoxicity  environmental safety

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