太湖流域典型地区土壤酸度的空间变异特征研究  

Characteristics of Spatial Variability of Soil Acidity in the Typical Area of Taihu Lake Region

作　　者：刘付程[1] 史学正[2] 于东升[2] 

机构地区：[1]淮海工学院空间信息科学系,江苏连云港222001 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《安徽师范大学学报（自然科学版）》2006年第5期480-483,共4页Journal of Anhui Normal University(Natural Science)

基　　金：国家重点基础研究规划项目(G1999011810);淮海工学院自然科学基金;博士科研启动基金项目

摘　　要：在GIS支持下,运用地统计学方法分析了太湖流域典型地区耕层土壤pH的空间变异性.结果表明,研究区域土壤pH具有较强的空间自相关性,自相关距离在44km左右.在30km空间范围内,土壤pH的空间变异表现为各向同性,超出此范围,各向异性明显增强.Kriging插值结果表明,研究区域土壤pH的空间分布格局是北部高,中部低,南部丘陵地区则是高、低镶嵌分布.A geostatistics method combined with GIS was applied to analyze the spatial variability of top - soil acidity in the typical area of Taihu Lake Region. The results showed that the spatial variability ot soil pH was apparent in isotropy within the distance of 30kin, beyond which the anisotropy of spatial variability was increasing due to the change of soil parent materials in the direction of NE34＊. The semivariograrn showed the soil pH had a relatively good spatial autocorrelation with the ratio of nugget to sill reaching 0.29, and the autocorrelative range extended to about 44kin. The map of the soil pH interpolated through block Kriging depicted that the soil pH was higher in the northern part of the studied area than in the middle part, and the high “spot” of pH inlaid in the lower patch in the southern intervale.

关 键 词：土壤酸度 地统计学 空间变异 KRIGING 太湖流域 

分 类 号：S153.4[农业科学—土壤学]