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OALib Journal期刊
ISSN: 2333-9721
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氯丹和灭蚁灵污染场地土壤对陆生生物的毒性效应
DOI: 10.3724/SP.J.1145.2012.00093, PP. 93-99
Keywords: 土壤污染,氯丹,灭蚁灵,蚯蚓,急性毒性,发芽抑制率,根伸长抑制率
Abstract:
为向污染土壤的监测、生态毒理诊断及修复提供方法和数据，以氯丹、灭蚁灵污染场地土壤为供试土壤，测定了氯丹、灭蚁灵复合污染对蚯蚓的急性毒性效应以及对小麦、小白菜、玉米和水稻4种植物种子发芽率和根伸长抑制率的影响.结果表明，蚯蚓对本场地污染响应十分敏感，处理d3高浓度组开始出现死亡，此后死亡率随污染物浓度增大而上升，d14部分高浓度组死亡率达到100%；同一浓度下，氯丹和灭蚁灵对4种植物种子根伸长抑制率均显著大于对种子发芽的抑制率，植物的根生长比种子发芽对有机污染物的毒性更为敏感.4种植物种子对污染场地土壤的敏感性为小麦＞小白菜＞水稻＞玉米.氯丹和灭蚁灵对蚯蚓的毒性要大于对这几种植物的毒性，蚯蚓对氯丹和灭蚁灵的响应更加敏感.因此，蚯蚓作为指示生物，其急性毒性试验可作为氯丹和灭蚁灵污染场地的诊断指标，诊断周期以14d为宜.图2表6参20
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