Spatial Variability Characteristics of Available Trace Elements in Plow Layer Soil Based on Geostatistics—A Case Study of Wendeng District, Weihai City

Sun Cuishan; Li Yuhuan; Chen Ming

doi:10.14083/j.issn.1001-4942.2017.07.017

Abstract：In this paper, the spatial variability characteristics of available microelements in farmland soils in Wendeng District of Weihai City were studied by means of geostatistics and ArcGIS.The results of statistical analysis showed that the available B, Fe, Mn, Cu and Zn accorded with the logarithmic normal distribution, and the contents of trace elements were all within the normal range, but the total level was lower.The variation coefficients of soil microelements had greater differences and the distribution was not balanced.The available Fe, Mn, Zn and Cu belonged to moderate degree of variation (10%~100%), while the available B belonged to low degree of variation (<10%).Structural analysis showed that the spatial variation of trace elements in Wendeng had anisotropy.The ratio of gold value to base value was less than 25%, so there was strong spatial correlation.It indicated that the influence of human factors was smaller in this region.The results of spatial local difference showed that the available Fe content was higher in the middle hilly area of central China, while the lowest in the central and southern regions, which presented regional characteristics.The distribution of available Mn had some similarity to the available Fe.The available Cu mainly concentrated in the northern mountains, the back of the Bible and the middle and south of hilly area.The difference between the available Zn and B was not obvious, and their distribution appeared fragmentation.Using the method of geostatistics to understand the spatial variation structure of soil microelements in this area would be of great significance to rational distribution of agricultural production and comprehensive management of soil resources.