水土保持通报2017，Vol.37Issue(2)：32-38,7.DOI:10.13961/j.cnki.stbctb.2017.02.005
黄土高原白草塬土壤水分特征及对土地利用变化的响应
Characteristics of Soil Water and Response to Land Use Changes on Baicao Loess Tableland
摘要
Abstract
[Objective] The characteristics and response of soil water to land use change(LUC) on Baicao loess tableland were demonstrated to provide information for water resources management and ecological construction.[Methods] Soil water contents in 0-10 m profile were measured under six typical land use types (farmland,grassland,alfalfa,apricot,apricot-caragana,and apricot-alfalfa land),and soil water storage (SWS),soil water deficit(SWD) and soil desiccation index(SDI) were calculated.[Results] The average soil water contents under the six land use types ranked as farmland＞grassland＞alfalfa＞apricot＞apricot-caragana＞apricot-alfalfa.The depth of water profiles being influenced by vegetation were different.The effects of alfalfa and grassland on water content concentrated in 0-5 m profile,while the effects of other land use types as apricot,apricot-caragana,and apricot-alfalfa were detected in the whole measured profile,it was as deepen as 10 m.Except for farmland,SDIs were very large for all land use types in 0-5 m depth.In 5-10 m profile,SDIs were comparatively small under farmland,grassland and alfalfa;and were moderate under apricot and apricot-caragana;exhibited the largest under apricot-alfalfa.[Conclusion] The conversion from farmland to other land use types with apricot greatly impacted soil water at deep soil profile.These land use tvpes reduced SWS and deteriorated soil water condition by desiccation.关键词
土壤水分/土地利用变化/深剖面/黄土塬区Key words
soil water/land use change/deep soil profile/loess tableland分类
农业科技引用本文复制引用
林国伟,李志,李晨曦,向伟,林雪青..黄土高原白草塬土壤水分特征及对土地利用变化的响应[J].水土保持通报,2017,37(2):32-38,7.基金项目
国家自然科学基金项目“基于环境同位素的黄土高塬沟壑区水循环机制研究”(51179161) （51179161）
中央高校基本科研业务费(2452015105) （2452015105）
