桓台县土壤地球化学背景值及分区特征

Geochemical Background Values of Soil and Characteristics of Geochemical Divisions in Huantai County

摘要:

通过对桓台县域内表层土壤开展1∶5万土地质量地球化学调查与评价工作，统计了表层土壤地球化学参数，厘定了桓台县土壤地球化学背景值，并与山东省、淄博市元素平均值进行对比，发现土壤元素中Se、有机质、N，Zn，P，Hg，Cd，V，F，I含量明显偏高于山东省土壤均值；土壤元素中Se，I，P，N，Hg，Cd含量明显偏高于淄博市土壤均值；Se元素高于淄博市土壤均值。对表层土壤进行聚类分析和因子分析，根据聚类分析分组结果和各因子得分空间分布特征情况，结合研究区内土壤类型、地形地貌、土地利用方式的不同，综合考虑影响元素含量的各种因素，将研究区表层土壤分为5个地球化学分区，各分区元素组合特征不同。研究结果表明：土壤元素分布特征主要受控于地质背景，人类活动对土壤元素含量产生一定程度的影响。

Abstract:

Through carrying out land quality geochemical survey and evaluation with the scale of the 1∶50000 in Huantai county, geochemical parameters of surface soil are studied and geochemical background values are determined. Comparing these background values with average values of Shandong province and Zibo city, it is found that the contents of Se, Corg, N, P, Zn, Hg, Cd, V, F, I and B in the soil are significantly higher than the average values in Shandong province, while the contents of Se, I, P, N, Hg and Cd are significantly higher than the average values in Zibo city, and the content of Se in the soil is higher than the average value in Shandong province and Zibo city. Cluster analysis and factor analysis are carried out to the surface soil. According to the result of clustering analysis group and spatial distribution characteristics of each factor score, combining with soil types, landforms, land use types in the study area, and comprehensively considering various factors that affect the contents of elements, the surface soil in the study area is divided into five geochemical divisions with different combination characteristics of elements. It is showed that the distribution characteristics of soil elements are mainly controlled by geological background, and human activities affect soil elements content in certain degree.