水利学报2017，Vol.48Issue(5)：608-612,622,6.DOI:10.13243/j.cnki.slxb.20161366
黑土区农田土壤含水量空间变异性的尺度效应研究
Scale effect of spatial variability of cropland soil water content in black soil region
摘要
Abstract
In order to reveal the scale effect of spatial variability of soil water content in black soil region,the change rules of spatial variability of soil water content with the sampling area were analyzed by the methods of traditional statistics,geostatistics and multifractality on the basis of soil water content measured with TDR in 32 m×32 m,48 m×48 m,64 m×64 m,80 m×80 m and 96 m×96 m sampling areas.The results show that the mean values of soil water content from different sampling areas range in 31.13％-33.57％,existing variations caused by scales less than the sampling one and experimental errors,with spatial correlation scope between 25.80-123.60 m,and spatial correlation degrees within 16.742％-29.874％ and spatial variability degrees ranged 0.0292-0.1026 in different sampling areas.With the increase of sampling areas,the mean content and spatial variation degree of soil water content decrease,and the variations and spatial correlation range decreased firstly and then increased,its spatial correlation degree increased firstly and then decreased,and local information that caused its spatial variability in different sampling areas are different.关键词
黑土区/土壤含水量/空间变异性/尺度效应Key words
black soil region/soil water content/spatial variability/scale effect分类
农业科技引用本文复制引用
孔达,王立权,刘继龙,付强..黑土区农田土壤含水量空间变异性的尺度效应研究[J].水利学报,2017,48(5):608-612,622,6.基金项目
国家自然科学基金项目(51409046,51279031) （51409046,51279031）
