土壤2011，Vol.43Issue(6)：998-1003,6.
不同尺度下土壤盐分空间变异的指示克里格评价
Evaluation on Spatial Distribution of Soil Salinity by Indicator Kriging at Two Sampling Scales
摘要
Abstract
Taking into account the problem of soil salinization existing in the current Huanghuaihai Plain, spatial distribution of soil salinity at depth of 0 - 20 cm layer at different scales was analyzed in a typical country of Yucheng City with the application of GIS and indicator Kriging of nonparametric geostatistics, and probability maps of soil salinity were provided. The results indicated that neither soil salinity of country scale nor of town scale followed normal distribution because of the existence of outliers, but robust semivariogram could be obtained by using indicator Kriging. Soil salinity of the both scales exhibited moderate spatial autocorrelation due to compound impacts of structural and stochastic factors. The Co/Sill decreased, but range increased as the enlargement of research-scale, which indicate that the self-correlation of soil salinity increased, the influences of random factors weakened while these of structural factors increased. Salinization risk increased with the decrease of scale.关键词
不同尺度/土壤盐分/空间变异/指示克里格Key words
Different scales/ Soil salinity/ Spatial variability/ Indicator Kriging分类
农业科技引用本文复制引用
杨奇勇,杨劲松,姚荣江..不同尺度下土壤盐分空间变异的指示克里格评价[J].土壤,2011,43(6):998-1003,6.基金项目
公益性行业(农业)科研专项经费项目(200903001)、海洋公益性行业科研专项经费项目(201105020-3,201105020-4)、国家自然科学基金项目(41171181)和中国科学院知识创新工程重要方向项目(KZCX2-YW-359)资助. （农业）
