Abstract:
Based on the measured contents of the main trace elements (B, Cu, Mn, Mo, and Zn) in 1175 surface soil samples (sampling depth: 0~20 cm), this study analyzed the contents and spatial distribution characteristics of the trace elements in the soil in Hailun City using both geostatistics and geographic information system (GIS). The results are as follows. The surface soil in the city is deficient in B and Mo. Elements Mn and Mo in the surface soil have nugget-to-sill ratios greater than 75%, with weak spatial autocorrelation. Elements B, Cu, and Zn in surface soil have nugget-to-sill ratios of 25%~75%, with moderate spatial correlation, and their spatial variations are mainly affected by natural factors. Elements B and Cu in the surface soil have similar spatial distribution, with the contents gradually decreasing from the center to the surroundings of the city. The Mn and Mo contents in the surface soil show an obvious zonal distribution, and the Zn content is higher in the north than in the south. There are both symbiotic and antagonistic relationships among trace elements. The soil organic matter content, soil parent materials, soil type, and land uses have different effects on the trace elements in the surface soil in the city.