应用生态学报2017，Vol.28Issue(8)：2509-2516,8.DOI:10.13287/j.1001-9332.201708.031
绿洲-荒漠过渡带土壤蓄水量的空间分布及其时间稳定性
Spatial distribution and temporal stability of soil water storage in an oasis-desert ecotone
摘要
Abstract
Understanding soil water dynamics is crucial to water resource management and ecological construction in oasis regions.In this paper,a case study was conducted to examine the spatialtemporal distribution characteristics of soil water using geostatistical analysis and temporal stability analysis in the oasis-desert ecotone of the middle reaches of Heihe River Basin,based on the field monitoring of soil water content throughout the growing season from 2012 to 2014 in a 50 km2 area.Results showed that soil water storage for the oasis-desert ecotone on the north shore of the Heihe River was highest in August and lowest in October.The mean soil water storage in the 0-2 m profile was approximately 367 mm.The gradient distribution of soil water storage from the oasis to the desert was not only related to the river channel but also to the land use type.Soil water storage in different land uses followed the order of cropland＞forest land＞shrub land＞desert.On average,soil water storage in the cropland was 300％ higher than that in the desert.There existed great differences in the temporal stability of soil water storage at different sampling points,and the strength of temporal stability in various land uses was in order of shrub land＞desert＞cropland＞forest land.The seasonal variations of river water had direct effects on soil water within the distance of 3 km.A timestable transect of soil water was observed between the river-bank oasis and the newly cultivated cropland,which indicated the development and evolution of the oasis ecosystem.关键词
土壤水分/空间分布/时间稳定性/生态交错带/黑河Key words
soil water/spatial distribution/temporal stability/ecotone/Heihe River.引用本文复制引用
张帅普,邵明安,李丹凤..绿洲-荒漠过渡带土壤蓄水量的空间分布及其时间稳定性[J].应用生态学报,2017,28(8):2509-2516,8.基金项目
本文由国家自然科学基金项目(91025018,41530854)资助 This work was supported by the National Natural Science Foundation of China (91025018,41530854). （91025018,41530854）
