| 摘要: |
| 应用地累积指数及聚类分析法对连平县林地土壤重金属污染状况进行分析与评价研究。从广东省土壤重金属背景值计算的地累计指数结果来看，连平县林地土壤中存在一定的As、Cd与Hg元素污染，污染等级均为轻度-中等，其余5种元素未造成污染。Cd的污染频率最大，达到100%；其次为As与Hg，污染频率分别为98.71 %与50.32 %，其余元素按污染频率由大到小排序为Zn、Pb、Cu、Ni、Cr。连平县各乡镇（林场）地累积指数聚类结果显示，绣缎镇和大湖镇均单独为一类，连平县与其余地区聚为一类。绣缎镇除Pb外各重金属元素地累积指数为各地区最低，大湖镇8项重金属元素地累积指数均处于较高水平。 |
| 关键词: 林地土壤重金属 地累积指数 聚类分析 污染评价 连平县 |
| DOI： |
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| 基金项目:广东省生态林业建设项目“林地土壤调查”，广东省科技计划项目(2019-07)。 |
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| Heavy Metal Pollution Evaluation of Forest Soil in Lianping based on Geo-accumulation Index Method |
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sun dongxiao, zhangzhongrui, q, zou
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1
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| Abstract: |
| The geo-accumulation index and cluster analysis method were used to analyze and evaluate the soil heavy metal pollution status of forest land in Lianping. According to the results of geo-accumulation index calculated from the heavy metals background value in soil of Guangdong Province, there was a certain amount of As, Cd and Hg element pollution in the forest soil of Lianping, and the pollution levels were mild-moderate pollution, and the remaining 5 elements were not polluted. Cd had the largest pollution frequency, reaching 100%; followed by As and Hg, with pollution frequencies of 98.71% and 50.32%, respectively, and the remaining
elements were Zn, Pb, Cu, Ni and Cr in order of pollution frequency from largest to smallest. The results of geo-accumulation index clustering of each township (forest
farm) in Lianping showed that Xiuduan and Dahu were clustered into one category,
respectively, and Lianping was clustered into one category with the rest area. The accumulation index of heavy metal elements in Xiuduan except Pb was the lowest in each region, and the accumulation index of 8 heavy metal elements in Dahu was at a high level. |
| Key words: soil heavy metals of forest land geo-accumulation index clustering pollution evaluation Lianping |
