中文摘要：

以河套灌区内一典型实验区的土壤水盐空间变异性为案例,对比分析了指示克立格、析取克立格、概率克立格风险概率计算值。结果表明,IK法与PK法具有相似的功能,而DK法则有局部细化、突出细部的特点。3种概率估计误差无明显差别。而阈值不同则概率估计误差不同。若单纯考虑提高概率估计精度,不宜选择中位数作为单阈值进行概率估计。

英文摘要：

Based on the spatial variation of soil water-salt at a representative experimental area in Hetao ir- rigation zone, risk probabilities using IK, DK and PK methods of non-parameter geostatistics theory were analyzed. The results indicated that function of IK and PK was similar, but DK had characters of part highlighting. Errors of three probability methods had no obvious difference. Error of probability estima- tion was different with different thresholds. In order to only improve accuracy of probability estimation, middle digit should not be selected as single threshold.