Animal Husbandry and Feed Science ›› 2023, Vol. 44 ›› Issue (3): 75-82.doi: 10.12160/j.issn.1672-5190.2023.03.011

• Animal Husbandry Resource and Environment • Previous Articles     Next Articles

Ecological Risk Assessment of Soil Heavy Metals in Roadside Grassland in Central Inner Mongolia

HE Yimin1,2,Hongyu 1,2,WANG Yang1,2,HUA Yao1   

  1. 1. College of Life Science and Technology,Inner Mongolia Normal University,Hohhot 010022,China
    2. Key Laboratory of Biodiversity Conservation and Sustainable Utilization for College and University of Inner Mongolia,Hohhot 010022, China
  • Received:2023-03-14 Online:2023-05-30 Published:2023-07-12

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

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