水科学进展2017，Vol.28Issue(4)：515-522,8.DOI:10.14042/j.cnki.32.1309.2017.04.005
黄土高原关键带全剖面土壤水分空间变异性
Spatial variability of soil water for the entire profilein the critical zone of the Loess Plateau
摘要
Abstract
Soil water is central to our understanding of water cycle, groundwater recharge and vegetation restoration in the critical zone of the Loess Plateau.To ascertain the spatial variability of soil water for the entire profile in the critical zone of the Loess Plateau, we obtained soil samples from the top of soil profile to bedrock in five typical sites (Yangling, Changwu, Fuxian, Ansai and Shenmu) based on soil core drilling and analyzed soil water vertical distribution, variation character and spatial structure in the entire soil profiles by classic statistics combining with geo-statistics.Results indicated that mean soil water content in the entire profile decreased at south-north direction in the critical zone of the Loess Plateau.Variabilities of soil water in the five sites all were moderate.Soil water variation in each site became weak gradually and difference in soil water content between the sites decreased as soil depth increased from 40 m to 200 m.Geo-statistics analysis demonstrated that semi-variogram of soil water content in the sites could be fitted well by theory model except Yangling site and exponential model could describe spatial variation structure in the most profiles.These results can benefit the understanding of soil water status and distribution regime in ultra-deep soil profile and are valuable for soil water resources estimation and vegetation restoration in the Loess Plateau.关键词
土壤水分/空间变异/关键带/深剖面/黄土高原Key words
soil water/spatial variability/critical zone/deep profile/Loess Plateau分类
农业科技引用本文复制引用
乔江波,朱元骏,贾小旭,黄来明,邵明安..黄土高原关键带全剖面土壤水分空间变异性[J].水科学进展,2017,28(4):515-522,8.基金项目
国家自然科学基金资助项目(41571130081 （）
41371242)The study is financially supported by the National Natural Science Foundation of China (No.41571130081 （）
No.41371242). （）
