基于GIS和地统计学的昌图县表层土壤有机碳密度空间变异分析

摘要

采用GIS和地统计学相结合的方法，分析昌图县表层土壤（0~20 cm）样品中的有机碳密度，探讨有机碳密度的空间变异特性。结果表明，表层土壤有机碳密度在0.55~3.41 g/kg之间，平均值为1.97 g/kg，具有强变异性；有机碳密度的理论变异函数符合线形模型，具有较强的空间相关性。%This paper made analysis for Changtu laboratory data of 70 sample 0~20 cm surface soil samples. Spatial analysis was conducted by GIS and geostatistics in Changtu. Results showed that surface soil organic carbon density varied between 0.55 g/kg and 3.41 g/kg, the mean content was 1.97g/kg, with strong variability, and the semivariograms for surface soil organic carbon density was well fitted by spherical model, with a weaker spatial correlation.