内蒙古中部地区路侧草原土壤重金属生态风险评价

doi:10.12160/j.issn.1672-5190.2023.03.011

摘要/Abstract

摘要：

[目的]调查内蒙古自治区锡林郭勒盟镶黄旗克氏针茅-羊草典型草原区路侧土壤重金属污染情况，为典型草原土壤修复提供参考。[方法]在研究区内选取G511国道两侧5个实验样地，采用4种重金属生态风险评价方法（单因子指数、内梅罗综合指数、潜在生态风险指数和地积累指数），对研究区土壤进行生态风险评价。[结果]研究区内8种重金属元素（As、Cd、Cr、Cu、Hg、Ni、Pb和Zn）的含量均超过内蒙古自治区锡林郭勒盟土壤背景值，均低于国家土壤环境质量一级标准;单因子指数和地积累指数为Cd>Hg>Cu>Zn>Cr>As>Ni>Pb，潜在生态风险指数为Cd>Hg>As>Cu>Ni>Pb>Cr>Zn。[结论]研究区Cd元素有较高的生态风险。

关键词: 草原, 土壤, 重金属污染, 生态风险评价

Abstract:

[Objective] This study was conducted to investigate the heavy metal pollution of the roadside soil in a typical grassland with dominant species of Stipa capillata and Leymus chinensis in Xianghuang Banner, Xilin Gol League, Inner Mongolia, and to provide references for soil remediation of typical grassland. [Method] In the research area, five experimental plots on both sides of National Trunk Highway G511 were selected. Four heavy metal ecological risk assessment methods （single factor index, Nemerow composite index, potential ecological risk index, and land accumulation index） were used to assess the ecological risk of soil in the research area. [Result] The soil contents of eight heavy metal elements（As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn） in the research area exceeded the soil background values in Xilin Gol League, Inner Mongolia, and were lower than the first-class standard of national soil environmental quality. The single factor index and land accumulation index were Cd>Hg>Cu>Zn>Cr>As>Ni>Pb, and the potential ecological risk index was Cd>Hg>As>Cu>Ni>Pb>Cr>Zn. [Conclusion] The Cd element in the research area had a higher ecological risk.

Key words: grassland, soil, heavy metal pollution, ecological risk assessment

中图分类号:

X53
X171

何一民, 红雨, 王阳, 华耀. 内蒙古中部地区路侧草原土壤重金属生态风险评价[J]. 畜牧与饲料科学, 2023, 44(3): 75-82.

HE Yimin, Hongyu , WANG Yang, HUA Yao. Ecological Risk Assessment of Soil Heavy Metals in Roadside Grassland in Central Inner Mongolia[J]. Animal Husbandry and Feed Science, 2023, 44(3): 75-82.

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