水科学进展2016，Vol.27Issue(4)：520-528,9.DOI:10.14042/j.cnki.32.1309.2016.04.005
黄土高原南北样带不同土层土壤水分变异与模拟
Variation and simulation of soil water content within different soil depths along the south-north transect of the Loess Plateau
摘要
Abstract
Soil moisture is one of the key factors for vegetation restoration and ecological reconstruction on the Chinese Loess Plateau (CLP). To understand the regional spatio⁃temporal variations of profile soil water content and its potential influencing factors, a south⁃north transect with 86 observational sites were determined on the CLP . Soil water content was measured using a neutron probe to depth of 5 m from June to November 2013. The distribution and variation characteristics of soil water storage ( SWS) were evaluated and simulated using classical statistics. The results showed that SWS within different soil layers exhibited moderate variation and generally decreased from the south to the north of the CLP . The mean SWS within the 0—5 m profile for the transect was 735 mm. Spatial variation in SWS in⁃creased with increasing soil depth, while the temporal variation had a decreasing trend, suggesting that soil water con⁃tent tend to be more temporally stable in deeper layers. Soil moisture was primarily influenced by the aridity, the con⁃tent of clay, normalized difference vegetation index, and slope gradient on the regional scale. These parameters, therefore, could be used to predict spatial distribution of soil water content at a regional scale in a certain confidence level.关键词
土壤水分/时空变异/样带/区域尺度/黄土高原Key words
soil water content/spatio-temporal variation/transect/regional scale/Loess Plateau分类
农业科技引用本文复制引用
贾小旭,邵明安,张晨成,赵春雷..黄土高原南北样带不同土层土壤水分变异与模拟[J].水科学进展,2016,27(4):520-528,9.基金项目
国家自然科学基金资助项目 （）
