| 老化土壤中铅对赤子爱胜蚓生长及繁殖的影响 |
| 摘要点击 2053 全文点击 936 投稿时间：2013-08-30 修订日期：2013-10-22 |
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| 中文关键词 土壤老化 铅 赤子爱胜蚓 生长 繁殖 |
| 英文关键词 soil aging lead Eisenia fetida growth reproduction |
| 作者 | 单位 | E-mail | | 陈丽红 | 中国环境科学研究院环境基准与风险评估国家重点实验室,国家环境保护化学品生态效应与风险评估重点实验室,北京 100012 | red-cup@163.com | | 刘征涛 | 中国环境科学研究院环境基准与风险评估国家重点实验室,国家环境保护化学品生态效应与风险评估重点实验室,北京 100012 | | | 方征 | 中国环境科学研究院环境基准与风险评估国家重点实验室,国家环境保护化学品生态效应与风险评估重点实验室,北京 100012 | | | 王晓南 | 中国环境科学研究院环境基准与风险评估国家重点实验室,国家环境保护化学品生态效应与风险评估重点实验室,北京 100012
北京师范大学水科学研究院,北京 100875 | | | 王婉华 | 中国环境科学研究院环境基准与风险评估国家重点实验室,国家环境保护化学品生态效应与风险评估重点实验室,北京 100012 | wangwh@craes.org.cn |
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| 中文摘要 |
| 采用赤子爱胜蚓（Eisenia fetida）为测试生物，人工土壤为测试介质，Pb（NO3）2为土壤污染物，研究土壤老化对赤子爱胜蚓生长及繁殖的影响.结果表明，与对照组相比，污染土壤中赤子爱胜蚓体重随土壤中Pb（NO3）2浓度的升高呈现降低的趋势.Pb（NO3）2在人工土壤中老化0、7、28和84 d 后，不同老化时间，Pb（NO3）2抑制赤子爱胜蚓的生长也不相同，影响最明显的是1000 mg·kg-1和1500 mg·kg-1试验组.不同老化时间的Pb（NO3）2对赤子爱胜蚓繁殖的影响有很大差异，其产茧量的半数有效浓度（EC50）分别为1085.10、1163.32、1666.86和1606.94 mg·kg-1；幼蚓孵化量的EC50分别为700.01、703.88、1031.34和1017.89 mg·kg-1.Pb（NO3）2在人工土壤中经过不同老化时间后，其对赤子爱胜蚓生长及繁殖的影响有很大的差异，这种差异影响到对土壤Pb（NO3）2污染的毒性评估，因此，进行Pb（NO3）2毒性试验时应考虑其在土壤中的老化作用.此研究结果可为老化土壤中污染物的生态风险评估以及土壤环境质量标准的制定提供科学依据. |
| 英文摘要 |
| In this study, effects of Pb(NO3)2 on the growth and reproduction of Eisenia fetida were investigated with artificial soils. The results showed that: compared with the control group, the growth of E. fetida in contaminated soil was inhibited significantly with increasing Pb(NO3)2 concentrations. But there were great differences in the extent of inhibition after 0, 7, 28 and 84 days of aging in the artificial soils. The most obvious effect occurred in 1000 mg·kg-1 and 1500 mg·kg-1 experimental groups. There was a very big difference in the effects of Pb(NO3)2 on reproduction of E. fetida with different aging times. The medium effective concentration(EC50)values of cocoon production inhibition were 1085.10, 1163.32, 1666.86 and 1606.94 mg·kg-1. In addition, the EC50 values of the number of juvenile inhibition were 700.01, 703.88, 1031.34 and 1017.89 mg·kg-1, respectively. This study indicates that soil aging which affects the toxicity of Pb(NO3)2 should be taken into consideration when toxicity tests of Pb(NO3)2 were carried out.The results could provide a scientific basis for the ecological risk assessment of aging soils and soil environmental quality standards. |
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