北京师范大学学报（自然科学版）2016，Vol.52Issue(3)：340-349,10.DOI:10.16360/j.cnki.jbnuns.2016.03.015
黑河中游山前荒漠和绿洲荒漠过渡带土壤植被空间分布特征研究
Spatial distribution of soil and vegetation in desert and oasis desert transition zone in mountain front of middle Heihe River basin
摘要
Abstract
Adjacent existence of desert and oasis is a unique landscape in arid area,where soil and vegetation are fundamental to sustain ecosystem stability.Desert and desert-oasis transition zone are studied. Transect sampling was used to characterize soil and vegetation,e.g.soil physical components,moisture, salinity,organic matters,vegetation cover,crown breadth/height,as well as vertical/horizontal distribution. Soil moisture in the study area is found to be between 1.49% and 5.57%;it is larger in Qilian Mountain front than in North Mountain front,indicating the flow recharge from Qilian Mountainous area to the Heihe River. Spatial characteristics differ in transects.Transects in Qilian Mountain front show silt and gravelly loam,high salinity and high vegetation cover,while transects in North Mountain front show gravelly and sand soil,low salinity and low vegetation cover.Soil moisture shows significant correlation with other soil characteristics. Soil moisture and vegetation cover increase by departure from oasis,traits of desert-oasis ecotone threatening safety of arid ecosystem.Vegetation and soil characteristics are highly correlated,expressed by a positive correlation between vegetation cover and soil moisture,fine-size particle fraction,organic matter,and the quadratic correlation among vegetation cover,height,crown breadth and the soil salinity,indicating salinity resistant effect on vegetation growth.关键词
黑河中游/干旱区/荒漠绿洲/植被/土壤水分Key words
Heihe River/arid area/desert-oasis/vegetation/soil moisture分类
生物学引用本文复制引用
王子丰,张淑荣,徐宗学,岳为峰,王国强,徐琛,赵捷..黑河中游山前荒漠和绿洲荒漠过渡带土壤植被空间分布特征研究[J].北京师范大学学报（自然科学版）,2016,52(3):340-349,10.基金项目
国家自然科学基金资助项目(91125015) （91125015）
