水科学进展2017，Vol.28Issue(3)：373-381,9.DOI:10.14042/j.cnki.32.1309.2017.03.007
黄土高原区域尺度土壤干燥化的空间和季节分布特征
Regional spatial and seasonal characteristics ofsoil desiccation on the Loess Plateau
摘要
Abstract
This study was to understand the spatial distribution characteristics of soil desiccation and quantitatively evaluate the soil desiccation conditions within different seasons on the Chinese Loess Plateau.For this purpose, soil water contents of the 0-5 m profile were measured before and after the rainy season in 2013, respectively, along a regional transect (N=86) established from the south to the north.The spatial distribution and variation characteristics of soil desiccation index (ISD) were analyzed using the geostatistical method.Results showed that the spatial pattern of soil desiccation had an obvious latitudinal zonality in the region.The spatial variability of ISD before rainy season was higher than that after rainy season.Dried soil layers were recovered to some extent after supplementation of precipitation after the rainy season.The degree of the recovery was higher in the central part of the region than that of the south and north areas.Furthermore, the difference of ISD distribution characteristics along the soil profiles mainly occurred in the top 0-2.3 m soil layers.This difference was mainly attributed to the limited recharge from rainfall in the shallow layers.关键词
土壤干燥化/黄土高原/区域尺度/雨季Key words
soil desiccation/Chinese Loess Plateau/regional scale/before and after rainy season分类
农业科技引用本文复制引用
易小波,贾小旭,邵明安,赵春雷..黄土高原区域尺度土壤干燥化的空间和季节分布特征[J].水科学进展,2017,28(3):373-381,9.基金项目
国家自然科学基金资助项目(41530854 （）
41501233)The study is financially supported by the National Natural Science Foundation of China (No.41530854 （）
No.41501233). （）
