小流域土壤有机质和全磷空间变异分析——以安徽省舒城县龙潭小流域为例  

Spatial Variability of Soil Organic Matter and Total Phosphorus in Small Catchment Areas——A Case Study in the Longtan Small Catchment

作　　者：张国耀[1,2] 程先富[1,2] 鲍伟佳[1] 沈非[1,2] 吴庆双[1] 

机构地区：[1]安徽师范大学国土资源与旅游学院 [2]安徽自然灾害过程与防控研究省级实验室,芜湖241003

出　　处：《应用与环境生物学报》2011年第2期169-173,共5页Chinese Journal of Applied and Environmental Biology

基　　金：安徽省自然科学基金项目(No.090415212);安徽高校省级自然科学研究重点项目(No.KJ2011A143);安徽省资源环境与地理信息工程中心建设基金资助~~

摘　　要：为了解土壤的地域差异性,基于地统计学半方差函数理论和GIS空间克立格插值定量分析了安徽省舒城县龙潭小流域有机质、全磷的各向同性、各向异性变异特征及分布格局.结果表明,有机质、全磷的半方差拟合模型均为指数模型,两者的分布都显示了强烈的空间自相关,自相关距离分别为642 m、435 m.有机质、全磷变异的各向异性都比较显著,有机质在0°、50°方向上变异程度明显大于90°、145°方向;全磷则在0°、145°方向的变异程度更加突出.有机质、全磷的分布呈明显的块状和带状,其中有机质中部含量高,南部、西部含量低;全磷则是南部、西北含量高,西部、东北含量低.In this study,geostatistics combined with GIS spatial Kriging was applied to quantitatively analyze the spatial variability and distribution pattern of soil organic matter（OM） and total phosphorus（TP） in the Longtan small catchment in Shucheng County,Anhui,China.The results showed that the semivariogram models of OM and TP both followed exponential model and they all had a strong spatial autocorrelation,with ranges being 642 m and 435 m,respectively.The variations of OM and TP in anisotropy all changed obviously,the variation of OM in 0° and 50° direction changed more strongly than that in 90° and 145° direction,while the variation of TP in 0° and 145° direction changed more strongly than that in 50° and 90° direction.The distributions of OM and TP showed block and band characteristics.The content of OM was found higher in the middle of the area,while lower in the south and west.However,the content of TP was higher in the south and northwest of the area,while lower in the west and northeast.

关 键 词：土壤有机质 土壤全磷 空间变异 地统计学 各向同性 各向异性 克立格插值 

分 类 号：S158[农业科学—土壤学]