Spatial Distribution Characteristic of Soil Enzymes Activity and Organic Matter Under Different Land Use Management Chongming Island

The paper present spatial distribution characteristic of soil enzymes and organic matter under different land use managements using a geostatistics method,which provide the scientific basis for soil utilization and facilitate soil quality.The 0～20 cm,20～40 cm and 40～60 cm soil layer in Chongming Island were sampled.The results showed that,under different land use management,the organic matter content was highest in industrial soil,and the organic matter content in river way,forestry and farmland decreased significantly with increasing soil depth.Through semivariogram and Moran'sI analysis,we found that soil enzymes spatial variability in Chongming Island were mostly due to random factor,and anisotropic correlogram occur at west-east direction,in which anisotropic spatial variability was smaller from north-south than from west-east direction.Through spatial interpolation analysis,we found that soil enzymes gradually decreased from Chongming midland,living area and industrial districts to eastern wetland and northern farmland.In addition,the soil enzyme activities and high activity area gradually decreased with increasing soil depth.