不同植被类型的土壤水分对黄土高原的影响(英文)

编号 zgly0001586118

文献类型 期刊论文

文献题名 不同植被类型的土壤水分对黄土高原的影响(英文)

作者 王志强  刘宝元  张岩 

作者单位 StateKeyLaboratoryofEarthSurfaceProcessesandResourceEcology  SchoolofGeography  BeijingNormalUniversity  KeyLaboratoryofSoilandWaterConservation&DesertificationCombat  BeijingForestryUniversity  Min-istryofEducation 

母体文献 Journal of Geographical Sciences 

年卷期 2009年06期

年份 2009 

分类号 S152 

关键词 LoessPlateau  vegetationtype  deepsoilprofile  soilmoisture  inter-annualchange 

文摘内容 Water stored in deep loess soil is one of the most important resources regulating vegetation growth in the semi-arid area of the Loess Plateau,but planted shrub and forest often disrupt the natural water cycle and in turn influence plant growth. The purpose of this study was to examine the effects of main vegetation types on soil moisture and its inter-annual change. Soil moisture in 0-10 m depth of six vegetation types,i.e.,crop,grass,planted shrub of caragana,planted forests of arborvitae,pine and the mixture of pine and arborvitae were measured in 2001,2005 and 2006. Soil moisture in about 0-3 m of cropland and about 0-2 m of other vegetation types varied inter-annually dependent on annual precipitation,but was stable inter-annually below these depths. In 0-2 m,soil moisture of cropland was significantly greater than those of all other vegetation types,and there were no significant differences among other vegetation types. In 2-10 m,there was no significant moisture difference between cropland and grassland,but the soil moistures under both of them were significantly higher than those of planted shrub and forests. The planted shrub and forests had depleted soil moisture below 2 m to or near permanent wilting point,and there were no significant moisture differences among forest types. The soil moisture of caragana shrub was significantly lower than those of forests,but the absolute difference was very small. The results of this study implicated that the planted shrub and forests had depleted deep soil moisture to the lowest limits to which they could extract and they lived mainly on present year precipitation for transpiration.