高寒草甸土壤水分的影响因子及其空间变异研究  

Impact Factors to Soil Moisture of Alpine Meadow and Their Spatial Heterogeneity

作　　者：王军德[1] 王根绪[1] 陈玲[1] 

机构地区：[1]兰州大学教育部西部环境重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2006年第3期428-433,共6页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(30270255);中国科学院知识创新工程重大项目(KZCX1-SW-04)资助

摘　　要：以黄河源区典型高寒草甸草地类型为对象，运用旋转主成分分析法对影响高寒草甸土壤水分的植被盖度、群落高度、土层根系深度、草地类型等9个环境因子进行了分析，将这些环境因子分为4个主成分因子依次为：立地与草地类型因子、植被因子、坡向风速因子和地形因子。同时，采用统计方法对于不同深度土壤水分进行了统计分析，揭示了土壤水分在整个土壤剖面上的空间变异可划分为：速变层（0～30cm）、活跃层（40cm）、次活跃层（50 cm）和相对稳定层（60 cm）。Nine environmental factors which influence the soil moisture of alpine meadow are analyzed through rotated principal component analysis, such as community＇s height, depth of root system of soil layer, land use pattern, etc. The analyses show that these environmental factors can be divided into four principal compositions successively： factors of plant, vegetation, slope, elevation,wind speed and topography. At the same time, using the software of counting, statistics of soil moistures for different depths are made and then the spatial heterogeneity of soil moistures is revealed. An overall soil section can be divided into speedy changing layer, changeful layer, second-changeful layer and relative stable layer from the top to the bottom.

关 键 词：高寒草甸 土壤水分 影响因子 空间变异 

分 类 号：S152.7[农业科学—土壤学]