1.Beijing Forestry University,Key Lab.of Soil & Water Conservation and Desertification Combating,Ministry of Education,100083;2.Chinese Academy of
Forestry Science,100091: Beijing,China
Abstract：Artemisia sphaerocephala、Caragana intermedia、Hedysarum fruticosum var.mongolicum are common plants in Mu Us Sandland,and are main species for preventing soil wind-erosion.This paper takes the single shrub of these species as research subjects,and the wind velocity and sediment delivery around them was measured,and their wind flow field based on aerodynamics principle was analyzed,It is concluded: 1) before the leaf-expansion period in spring,the protective effect of Artemisia sphaerocephala is superior and its protection distance is biggest one among three single shrub with similar cross section.2) The unreasonable disposition structure can cause the channeling effect in the current flow field between shrubs,and aggravate wind erosion.In order to improve the protective effect in the future,the plant disposition must be rational.
2008, Vol. 6 
