昌乐县表层土壤元素地球化学组合特征研究

Study on Geochemical Assemblage Characteristics of Surface Soil Elements in Changle County

摘要:

昌乐县土地质量地球化学调查与评价是按5件/km2的密度布设表层土壤样品，并以“多点取样”的方式进行样品采集，采样深度为0～20cm。分析有机质、N，P，K，B，Mo，Mn，Se，I，Ge，F，Pb，Zn，As，Cd，Cr，Cu，Hg，Ni，Co，V，pH和全盐量，共23项。该文统计了昌乐县表层土壤5818件样品的23种元素（指标）的数据，通过spss软件进行了聚类分析将23种元素（指标）划分为3个簇群和9个单元素簇，认为第一簇群主要受地质背景的影响；第二簇群主要受黏土矿物的影响；第三簇群主要与自然因素及人类农业生产活动有关。通过因子分析得出用10个因子就基本可以代表昌乐县原来23种元素（指标）的分布特征，并对F1，F2因子进行了解释，进一步证实了Ni，Co，Cr，V，Mn等亲铁元素与地质背景密切相关；有机质、N，Se则与自然因素及人类农业生产活动有关。首次摸清了昌乐县表层土壤元素组合分布特征，认为昌乐县表层土壤元素分布主要与地质背景、元素自身性质和人类农业生产活动有关。

Abstract:

Geochemical survey and evaluation on land quality in Changle county is carried out based on the density of 5 surface soil samples per square kilometer. Samples have been collected in the way of "multipoint sampling", and the sampling depth is 0~20cm. Organic matter, N，P，K，B，Mo，Mn，Se，I，Ge，F，Pb，Zn，As，Cd，Cr，Cu，Hg，Ni，Co，V，pH and total salt have been analyzed. The data of 23 elements in 5818 samples of surface soil in Changle county have been counted. Clustering analysis of 23 elements (indicators) is divided into 3 clusters and 9 single element clusters by spss software. It is believed that the first cluster is mainly influenced by geological background, the second cluster is mainly influenced by clay minerals, and the third cluster is mainly related to natural factors and human agricultural production activities. Through factor analysis, 10 factors have been obtained, which can basically represent the distribution characteristics of the original 23 elements (indicators) in Changle county. Through analysis on the F1 and F2 factor, it is confirmed that the siderophile elements, such as Ni, Co, Cr, V and Mn are closely related to the geological background. Organic matter, N, Se are related to natural factors and human agricultural production activities. The distribution characteristics of the surface soil elements in Changle county have been found. It is concluded that the distribution of surface soil elements of Changle county is mainly related to geological background, the nature of the elements themselves and the activities of human agricultural production.