亚热带植物科学 ›› 2024, Vol. 53 ›› Issue (6): 560-568.DOI: 10.3969/j.issn.1009-7791.2024.06.009

• 研究论文 • 上一篇    下一篇

广东韶关马坝森林公园土壤重金属污染评价及不同造林模式修复作用

张 亮*   

  1. (广东省林业调查规划院,广东 广州 510520)
  • 收稿日期:2024-10-23 接受日期:2024-11-16 出版日期:2024-12-31 发布日期:2025-03-20
  • 通讯作者: 张 亮
  • 基金资助:
    广东省韶关市林业局项目“韶关市曲江区多重污染地生态修复设计”

Evaluation of Soil Heavy Metal Pollution in Maba Forest Park in Shaoguan and the Role of Different Silvicultural Modes in Its Remediation

ZHANG Liang*   

  1. (Guangdong Forestry Survey and Planning Institute, Guangzhou 510520, Guangdong China)
  • Received:2024-10-23 Accepted:2024-11-16 Online:2024-12-31 Published:2025-03-20
  • Contact: ZHANG Liang

摘要: 为探究植被恢复模式对工业污染地的长效治理情况,持续跟进土壤重金属污染改善效果,以韶关市曲江区马坝森林公园为例,选用当地2021年发布的《土壤环境背景值》地方标准为参考值,利用内梅罗综合污染指数和潜在生态风险指数评价其污染程度。结果表明,土壤Cd平均含量超过区域背景值14.10倍,且Cd含量变异系数达102%,说明Cd出现富集特征,受外界干扰严重,或与周边韶赣高速穿过、废弃石料堆放有关;有90%采样点达到严重污染水平;调查区土壤重金属污染整体上以“轻微”生态风险和“很强”生态风险为主,需要对Cd和Pb给予重点关注。不同造林模式影响土壤重金属含量,人工造林显著降低土壤Cr元素含量,疏伐改造显著降低土壤中Cr和Ni元素含量,补植套种处理的影响相对较为温和。

关键词: 土壤重金属, 造林模式, 植物修复, 风险评估

Abstract: In order to investigate the long-term management of industrial polluted land by vegetation restoration mode and to continuously follow up the improvement effect of soil heavy metal pollution, this study took Maba Forest Park in Qujiang District, Shaoguan City as an example, chose the local standard of Soil Environment Background Value released in 2021 as the reference value, and evaluated the degree of its contamination by using the Nemero Comprehensive Pollution Index and the Potential Ecological Risk Index. The results showed that the average content of Cd exceeded the regional background value by 14.10 times, and the coefficient of variation of Cd reached 102%, indicating that Cd appeared to be enriched and seriously disturbed by the outside world, or related to the neighbouring Shaogan Expressway passing through, and the dumping of discarded stones; 90% of the sampling points reached the level of serious contamination; and the soil heavy metal contamination of the investigated area as a whole was divided into the categories of ‘slight’, ‘ecological risk’ and ‘potential ecological risk’. Soil heavy metal pollution in the survey area is mainly ‘slight’ and ‘very strong’ ecological risk, and Cd and Pb need to be paid attention to. Different afforestation modes affected soil heavy metal content, with artificial afforestation significantly reducing soil Cr content, thinning and renovation significantly reducing soil Cr and Ni content, and replanting treatments having a relatively mild effect.

Key words: soil heavy metals, silvicultural modes, phytoremediation, risk assessment

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