黄土高原区域尺度土壤干燥化的空间和季节分布特征

发布时间：2018-04-08 13:34

本文选题：土壤干燥化　切入点：黄土高原　出处：《水科学进展》2017年03期

【摘要】：为掌握黄土高原土壤干燥化程度的空间分布特征,定量评价雨季前、后土壤干燥化程度,于2013年在黄土高原南北方向布设一条样带(N=86),获取雨季前、后0~5 m剖面土壤含水量。采用地统计学方法分析了土壤干燥化指数的空间分布规律及变异特征。结果表明:在黄土高原地区,土壤干燥化程度存在明显的纬度地带性,且雨季前土壤干燥化指数的空间变异程度高于雨季后;经过雨季降水的补给,土壤干层在一定程度上得到修复,且中部地区的修复效果明显优于南部及北部地区;土壤干燥化指数剖面分布特征在雨季前、后的差异主要表现在浅层0~2.3 m土层,这主要归因于降水对浅层土壤水分的补给。
[Abstract]:In order to understand the spatial distribution characteristics of soil drying degree in Loess Plateau, and to evaluate quantitatively the degree of soil drying before and after the rainy season, a transect was set up in the north and south of the Loess Plateau in 2013 to obtain the soil moisture content in the 0 ~ 5 m profile before and after the rainy season.The spatial distribution and variation characteristics of soil drying index were analyzed by geostatistics.The results show that in the Loess Plateau, the degree of soil dryness has obvious latitude zonation, and the spatial variation of soil drying index before rainy season is higher than that after rainy season.The dry layer of soil was repaired to some extent, and the effect of soil dryness index in the central region was obviously better than that in the southern and northern regions, and the distribution characteristics of soil dryness index profile were mainly shown in the shallow layer of 0.2.3 m soil layer before the rainy season.This is mainly due to the recharge of precipitation to shallow soil moisture.
【作者单位】：西北农林科技大学资源环境学院;中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室;
【基金】：国家自然科学基金资助项目(41530854;41501233)~~
【分类号】：S152.7

【相似文献】