%0 Journal Article
%T Soil properties under shrubs in arid area of oasis-desert transition belt<br>干旱区绿洲-荒漠过渡带灌丛土壤属性研究
%A XU Wenqiang
%A LUO Geping
%A CHEN Xi
%A <br>许文强
%A 罗格平
%A 陈曦
%J 应用生态学报
%D 2006
%I 
%X In arid and semi-arid areas with sparse vegetation cover, the spatial pattern of surface soil had a definite effect on soil salinity and nutrient flow, which is of highly importance for understanding the processes of land cover change. In this paper, a total of 3 shrub types and 2 soil sampling depths (0-20 and 20-40 cm) in the arid area of oasis-desert transition belt were selected to assess the spatial heterogeneity of soil resources under shrubs. The results showed that different types of shrub had no significant effect on the particle size distribution of soil which was mainly composed of sand and silt, but significant cluster effect was observed under Tamarix ramosissima + bare land shrub. Soils under shrub canopy had significantly higher contents of organic matter, total N and available K, compared to those in open spaces, and presented obvious "fertile island" phenomenon. Shrub types had significant effects on soil salinity, and different cluster effect existed in soils under different shrubs. The heterogeneity of soil resources resulted from a large number of factors, including climate, soil environment, height and extent of shrub canopy, stemflow, existance of other ground cover plants, and so on, many of which were mutually interactive.
%K Oasis-desert transition belt
%K Fertile island
%K Soil resources
%K Soil particle size
%K Soil nutrients
%K Soil salinity<br>绿洲-荒漠过渡带
%K 肥岛
%K 土壤资源
%K 土壤粒度
%K 土壤养分
%K 土壤盐分
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=2C6228B1126C42C4&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=E158A972A605785F&sid=7882A2973AA04DE8&eid=CD26609C367AC9C8&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=6&reference_num=21