运用地统计学的土壤有机碳含量空间分布研究

Research on Spatial Distribution of Soil Organic Carbon Content Based on Geostatistics

运用GIS地统计、缓冲区分析、叠置分析等方法,初步研究了西昌市邛海盆地土壤有机碳空间变异特征及主要影响因素。分析结果表明,研究区土壤样本,呈正态分布,属中等变异强度,高值区位于主城区东南部和邛海海域东南部,低值区位于邛海海域东北部,并向西北方向递增。不同土壤质地其含量显著不同,中性条件下,其含量较高;不同缓冲区范围内,其含量表现出相应的相关性。

A preliminary research on the spatial distribution characteristics and their main influential factors of soil organic carbon in Qionghai basin here were performed by the software ArcGIS 9.3 with the geostatistics,buffer analysis and overlay analysis tools.The results were as follows.Firstly,the soil organic carbon content followed a normal distribution,and belonged to moderate variability.Secondly,the regions with high soil organic carbon content were located in the southeast of Xichang and the southeast of Qionghai,while the low ones were located in the northeast of Qionghai,and gradually increased towards northwest simultaneously.Furthermore,the organic carbon content was significantly different with different soil structure,especially in neutral condition,it had a high value.Finally,the content of soil organic carbon showed a corresponding correlation on different buffer zones.