| 摘要: |
| 拟建的韶关市马坝森林公园受周边铅锌冶炼厂的影响，土壤存在不同程度的重金属污染，植被稀少，环境恶劣。因此，该研究评估韶关市曲江区马坝森林公园土壤重金属污染程度，对比不同植被恢复的造林模式（补植套种、疏伐改造和人工造林）在去除土壤重金属中的作用。经现场踏查，研究区域的主要地类为疏林地、未成林造林地和无立木林地。疏林地优势树种为桉树Eucalyptus robusta、白花泡桐Paulownia fortunei和马尾松Pinus massoniana；未成林造林地主要树种为山杜英Elaeocarpus sylvestris、樟树Cinnamomum camphora、枫香Liquidambar formosana等。研究结果表明：该区域土壤重金属污染较为严重，尤其是Cd的污染，单因子潜在生态风险指数达到“极强”。不同的造林模式对土壤重金属的去除效力有显著的差异。其中，补植套种显著降低了土壤中Cu、Pb、Ni元素的含量，疏伐改造显著降低了土壤中Zn、Cd、Pb和Cr的含量。 |
| 关键词: 植被恢复 造林模式 重金属污染 风险评估 |
| DOI： |
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| 基金项目:2017 年中央节能减排财政政策综合示范城市典型示范项目森林碳汇造林(含生态景观带建设)补助资金(Z155110010003) |
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| Effects of Vegetation Restoration Patterns on Soil Heavy Metals in Industrially Polluted Areas: A Case Study of Maba Forest Park |
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Huang Huarong1, Zhang Liang2
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1.Guangdong Lingnan Comprehensive Survey and Design Institute,Guangzhou Guangdong;2.Guangdong Forestry Survey and Planning Institute,Guangzhou Guangdong
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| Abstract: |
| The proposed Maba Forest Park in Shaoguan city was affected by the surrounding lead and zinc smelting plants . The soil was polluted by varying degrees of heavy metals, the vegetation was scarce and the environment was harsh. Therefore, the purpose of this study was to assess the soil heavy metal pollution in Maba Forest Park, and compare the effects of different afforestation models (replanting interplanting, thinning, and artificial afforestation) on the removal of heavy metals in the soil. According to field investigation, the main types of land in the study area are sparse forest, unformed forest and non-standing forest. Eucalyptus robusta, Paulownia fortunei and Pinus massoniana were the dominant species in the open forest. The main tree species in unformed forest were Elaeocarpus sylvestris, Cinnamomum camphora and Liquidambar formosana. The results showed that the soil heavy metal pollution was serious in this area. Especially for Cd element, the single factor potential ecological risk index indicated “extremely strong”. Different afforestation models had significant differences in the removal efficiency of heavy metals from soil. The contents of Cu, Pb and Ni in the soil were significantly reduced by supplementary planting and interplanting, and the contents of Zn, Cd, Pb and Cr in the soil were significantly reduced by thinning. |
| Key words: vegetation restoration afforestation models heavy metal pollution risk assessment |
