土壤重金属与土壤理化性质的空间变异及研究

对研究区的部分土壤理化性质及土壤重金属的空间变异特性进行了分析,均表现出一定的空间变异性,并通过克里格插值得到它们的空间分布格局,表现出了一定的相似性,说明土壤理化性质与土壤重金属在空间分布上存在一定的相关性;通过对它们之间的空间相关性分析,表明克里格插值结果与实际计算结果是一致的,结果表明,土壤有机质、pH及各粒级含量土壤与Cu,Hg,As含量的相关性显著,与Zn,Pb和Cr为中等相关,且均为正相关,而与Cd的相关性不显著.在实际生产中,可以通过土壤部分理化性质来估计土壤重金属的分布特征.

Study of the Variations in the Distribution of Soil Heavy Metals and Soil Physico-Chemical Properties and Their Correlation——a Case Study of Zheng'An County of Guizhou Province

This paper analyzes the spatial variation characteristics of soil physico-chemical properties and soil heavy metals of the study area.Both showed a certain spatial variation.Their spatial distribution,which was obtained by Kriging interpolation,showed some similarities.All these results manifested that soil physico-chemical properties were related to soil heavy metals in their spatial distribution.Analysis of their spatial correlations showed that the results of Kriging interpolation were consistent with the results of computing.Soil organic matter,content of various classes of soil granules and pH were correlated significantly with the content of Cu,Hg and As,moderately with the contents of Zn,Pb and Cr,but were not correlated with Cd.Therefore,in practical production,the characteristics of distribution of soil heavy metals can be estimated with some of the soil physico-chemical properties.