草业科学2011，Vol.28Issue(7)：1234-1238,5.
贵州喀斯特暖性草丛土壤物理因子空间异质性分析
Spatial heterogeneity of soil physical factors in karst warm-temperate tussock type of grassland in Guizhou
摘要
Abstract
Spatial heterogeneity of soil is one of and the fractal analysis were used to examine the important properties of soil. The semivarianee analysis the spatial heterogeneity of soil physical factors in karst grassland in Guizhou. This study showed that soil moisture content, bulk density and porosity had a sig- nificant spatial heterogeneity. The spatial heterogeneity scale was 4 m to 15 m at 15~20 cm soil layer and was 12 m to 30 m at 15~20 cm layer. Degree of spatial heterogeneity changed with scale, and the spatial heterogeneity of the soil upper layer was bigger than that of the lower soil layer. The spatial heterogeneity of soil porosity at the upper layer was mainly consisted of spatial autoeorrelation, accounting for 68.0 %, while the soil water content and bulk density were part of a relatively large spatial heterogeneity. Soil physical properties of the underlying spatial heterogeneity were all caused by the spatial autocorrelation. Soil moisture content, bulk density and porosity of the fractal dimension were large （greater than or close to 1.8）, indicating a smaller scale ecological process of each variable factor played a control role in the development of spatial pattern.关键词
喀斯特/土壤物理因子/半方差分析/分形分析/空间异质性Key words
karst/soil physical factors/semivariance analysis/fractal analysis/spatial heterogeneity分类
农业科技引用本文复制引用
赵丽丽,王普昶,张锦华,宋高翔,李晨琼,陈燕萍..贵州喀斯特暖性草丛土壤物理因子空间异质性分析[J].草业科学,2011,28(7):1234-1238,5.基金项目
基金项目：贵州省农业攻关项目“贵州岩溶山区灌丛草地优化生产、生态模式研究”[黔科合NY字（2010）3045号] （）
贵州省农业攻关项目“贵州家庭牧场高效生产关键技术研究”[黔科合NY字（2009）3090] （）
