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中文摘要：
通过网格（10m×10m）取样，用地统计学方法研究了青藏高原高寒草甸覆盖区域（110m×90m）浅层剖面（0-40cm）土壤水分的空间异质性特征。结果表明：在高寒草甸覆盖区0-30cm深度范围内，土壤水分均存在高度空间异质性，其中87.3％-74.9％的空间异质性是由空间自相关部分引起的，主要体现在201m以下尺度，10m以下随机因素对空间异质性作用较小；30-40cm土壤水分空间异质性由10m以下尺度随机因素导致的占42.3％，而自相关部分的空间异质性（57.7％）体现在10-87.2m尺度。随土层深度的增加，分维数D有逐渐增大的趋势，说明随深度增加高寒草甸区土壤水分自相关空间异质性程度在降低，而随机因素导致的空间异质性程度在增加。从4层的Co／（C＋Co）值来看，10-20cm这一层的值最小，表明在这一层的系统变量的空间自相关性程度最高。说明高寒草甸区0-30cm土层的土壤水分含量是受降水、植被发育、根系分布、土壤特性和人为干扰等影响，其空间异质性主要受自相关因素控制，而30cm以下的土壤水分受自相关因素和随机因素共同控制。
英文摘要：
In this paper geo-statistical theory and methods are used to study the spatial heterogeneity o teristics in shallow profile （0 - 40 cm） of alpine meadow areas （110 m - 90 m） in the Qinghai-Xizang f soil moisture charac- Plateau. The 352 sam- pling points are fixed in total Using the grid sampling method （10 m × 10 m space） .The results show that in alpine meadows 0 - 30 cm depth of coverage area, there is a high degree of spatial heterogeneity of soil moisture. Within 87.3% - 74.9% spa- tial heterogeneity, part of the spatial autocorrelation is at 0 - 30 cm depth. The auto-correlation factors at 10 - 201 m scale play an important role in the 0 - 30 cm soil moisture spatial heterogeneity. But spatial heterogeneity of soil moisture at the layer of 30 - 40 cm depth can be controlled by the random and auto-correlation factors. With the increase of depth the fractal dimen- sion D has a gradually increasing trend. The worthy noting is that the random factor will increase at soil depth for soil moisture spatial heterogeneity. From the Co/（ C ＋ Co） comparable values of soil four layers, the minimum value is in the lowest level of this 10 - 20 cm, the level of system variables is shown in the highest degree of spatial autocorrelation. Soil moisture content of the layer 0 - 30 cm of alpine meadows area is affected by precipitation, vegetation growth, root distribution, soil characteristics and impacts of human interference et al.
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