王小庆;李菊梅;韦东普;黄占斌;马义兵;

• 1:洛阳理工学院
• 2:环境工程与化学系
• 3:中国农业科学院农业资源与农业区划研究所
• 4:国家土壤肥力与肥料效益监测站网

摘要(Abstract)：

污染物的剂量-效应关系是生态毒理学的重要基础。在剂量-效应关系中,EC10(10%有效抑制浓度)是建立基于风险的环境质量基准值的基础,但有关污染物生态效应的研究报导中多数采用毒性阈值EC50(半数抑制浓度),如何将EC50转化为EC10是建立污染物环境质量基准急需解决的问题。利用log-logistic拟合了中国17种代表性土壤中大麦、西红柿、小白菜3种植物的铜和镍剂量—效应曲线,获得了不同土壤中铜、镍剂量—效应曲线中段的斜率(b值),并依据计量—效应曲线获得3种植物在不同土壤中的铜、镍EC10和EC50值。结果表明:铜和镍的剂量—效应曲线b值受土壤性质显著影响,但不同物种间的变化较小,大麦、西红柿及小白菜的铜、镍剂量—效应曲线b值绝对值的平均值分别接近于6.0和7.0。利用来自中国土壤的毒理学数据建立的铜和镍EC50和EC10单因子量化模型能较为准确地通过铜和镍EC50值预测其EC10值,其量化模型的决定系数分别为0.704和0.799,当分别考虑土壤pH和有机碳(OC)的影响时,铜和镍的EC10量化模型的决定系数分别提高至0.730和0.885。土壤中铜、镍EC10与EC50量化关系的建立可为中国土壤中铜、镍的风险评价及相关标准的制定提供更多的数据基础。

关键词(KeyWords)： 土壤;剂量—效应曲线;铜;镍;毒性阈值

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(40971262);; 公益性行业(农业)科研专项(200903015)

作者(Author): 王小庆;李菊梅;韦东普;黄占斌;马义兵;

Email:

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