Abstract:It is of great significance for the land reclamation and ecological protection of mining areas to study the spatial variability characteristics of soil nutrients in the mining areas. In this paper, based on the geostatistics and GIS techniques, the spatial variability of soil nutrients and the effects of topographic factors and land use types on the spatial distribution of soil nutrients were studied in the Shengli mining area. The results showed that the average values of pH, soil organic matter, available nitrogen, available phosphorus and available potassium were 8.07, 21.59 g/kg, 82.91 mg/kg, 8.21 mg/kg and 257.34 mg/kg, respectively. pH showed a weak variation while other soil indexes showed the moderate variation. All soil indexes had a certain trend effect, the spherical model was optimal for pH, the linear platform model was optimal for organic matter and available potassium, and the exponential model was optimal for available nitrogen and phosphorus. There were moderate spatial autocorrelation of pH, organic matter and available nitrogen; but the spatial autocorrelation of available phosphorus and potassium were weak. pH decreased gradually from the middle to the four sides, organic matter and available nitrogen were higher in the west region with high elevation, but lower in the central and eastern regions under strong disturbance of human beings, whereas available phosphorus and potassium were irregularly distributed. Slope, aspect, elevation, and topographic wetness index were the main topographic factors contributing to the pattern differences of soil nutrients. From the point of view of land use, mining disturbance is the important reason for low nutrient content, the nutrient content of mining land is significantly lower than that of farmland and grassland.