湿地土壤养分的空间异质性研究方法构想

Conception of Investigative Method of Spatial Heterogeneity of Soil Nutrients in Wetlands

湿地土壤养分是时空连续的变异体 ,不论尺度大小均具有高度的空间异质性。湿地土壤养分变量属于区域化变量 ,同时具有随机性和结构性 ,仅运用经典的 Fister统计方法已经不能满足土壤空间异质性研究的需要。地统计学是近几十年发展起来的一门新的空间分析方法 ,其变异函数则适合于定量研究区域化变量空间结构变异特征 ,能够全面反映区域化变量的结构性。作者在前人的工作基础上意欲用地统计学的区域化变量理论和变异函数对湿地土壤养分的空间异质性进行定量研究 。

The soil nutrients in wetlands are spatial and temporal successive variants, with higher spatial heterogeneity in any scale.The variable of each soil nutrient in wetlands belongs to regionalized variable with its characters of randomness and constructive property, therefore it can not have met the need of the research of spatial heterogeneity only to apply the classical Fister statistical method. Geostatistics is a new method of spatial analysis which is developed in recent years, its variograms is suited to research quantitatively the characters of spatial structure variation of regionalized variable and can reflect fully the constructive property of regionalized variable.In this paper the author intends to research quantitatively the spatial heterogeneity of soil nutrients in wetlands by the theory of regionalized variable and variograms of geostatistics, meanwhile, conceives its investigative method.