西北林学院学报2017，Vol.32Issue(6)：67-73,7.DOI:10.3969/j.issn.1001-7461.2017.06.10
黑河中游荒漠绿洲过渡带固沙植被土壤水分的分布特征
Distribution Characteristics of Soil Moisture of Sand-fixing Vegetation in Desert-oasis Ecotone in the Middle Reaches of the Heihe River
摘要
Abstract
Soil moisture is the main limiting element for vegetation growth and development in arid area.Understanding the time-space distribution of soil moisture is important to the construction of vegetation.Before and after the rainy season in 2015,we examined the soil moisture distribution characters of the 0-120 cm profile of Nitraria sphaerocarpa,Calligonum mongolicum and Haloxylon ammodendron shrubs that were three typical plants for sand fixation in desert-oasis ecotone of Linze County,Gansu Province.The results showed that 1) before and after the rainy season,the general trends of the soil water content of three shrubs were on the rise with the increase of soil depth.The soil water contents of three shrubs all low in the surface and high in deep soil.Soil moisture was influenced by rainy season at water active layer.2) Before the rainy season,the rule of the soil moisture content of three shrubs in different horizontal distances (0,1,2,and 5 m) was in the order of N.sphaerocarpa＞C,mongolicum＞H,ammodendron shrubs.After the rainy season,the soil moisture content of three shrub species in different horizontal distances had no obvious regularity.3) Before the rainy season,the spatial pattern of soil moisture of N.sphaerocarpa and C,mongolicum was soil moisture in the margin of the shrub＞inside the shrub,while the spatial pattern of H.ammodendron was inside the shrub＞margin of the shrub.关键词
荒漠—绿洲过渡带/固沙植被/土壤水分/时空分布Key words
desert-oasis ecotone/sand-fixing vegetation/soil moisture/temporal and spatial distribution分类
农业科技引用本文复制引用
陈宏祥,胡广录,赵晨宇,张宏伟,王德金..黑河中游荒漠绿洲过渡带固沙植被土壤水分的分布特征[J].西北林学院学报,2017,32(6):67-73,7.基金项目
国家自然科学基金(41161082、41561102). （41161082、41561102）
