• 关键词：地球化学背景值  重金属  因子分析  判别分析

• 基金项目：

• 唐诵六
• 中国科学院南京土壤研究所

• 摘要：在北京、天津、济南、南京、广州和广东省采集了46个土壤样品,样品包括由花岗岩、片麻岩、辉长岩,橄榄辉长岩和石灰岩发育的褐土、黄棕壤、红壤、黄壤、赤红壤、砖红壤和石灰土。测定了样品中铜、锌、锰、铬,钴、镍、铅和砷的含量并进行了Q型因子分析和两组线性判别分析。结果表明,可将46个土壤划分为由酸性岩发育的土壤和由基性岩发育的土壤两大类。酸性岩土壤又可再划分为高铅花岗岩和低铅花岗岩土壤两组.基性岩土壤也可再划分为火成岩土壤和沉积岩(石灰岩)土壤两组。结果又表明,46个土壤的8种重金属元素的地球化学背景值与母岩类型之间的关系远比与土壤类型之间的关系更为密切。

• Abstract：Forty six soil samples including drab soil, yellow brown earth, red earth, yellow earth, lateritic red earth, laterite and limestone soil developed from various parent material of granite, gneiss, gabbro, olivine-gabbro and limestone were collected from Beijing, Jinan, Nanjing, Guangzhou and Guangdong Province. The contents of Cu, Zn, Mn, Cr, Co, Ni, Pb and As were determined. Q mode factor analysis and two groups linear discriminant analysis were carried out and the results showed that the soil samples may be divided into two groups according to their parent material. The first group includes those developed from acidic rocks and can be subdivided into high- and low-lead granite soils. The soils with basic rocks as their parent material belong to the second group which can be further divided into soils developed from either igneous or sedimentary rocks. It is clear that the kinds of parent rock is a much more important factor effecting soil metal contents than the soil types.

• Key words：heavy metal  soil background content  factor analysis  discriminant analysis.

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