Abstract: Based on the analysis of species important values and Shannon-Wiener index of Artemisia halodendron community on different type sandy lands in Horqin, A. halodendron community was classified into three types, i.e., A. halodendron-annual herbage, A. halodendron-perennial grass, and A. frigida-A.scoparia+ perennial grass, which distributed on shifting sandy land, semi-fixed sandy land, and fixed sandy land, respectively. With the sand fixed, the community succession was ranked from A. halodendron-annual herbage (pioneer stage, coverage ＜10%, Shannon-Wiener index 0.33) to A.halodendron-perennial grass (coverage 30%～35%, Shannon-Wiener index 0.56), and then to A. frigida-A. scoparia+ perennial grass (steppe community, coverage 40%～45%, Shannon-Wiener index 0.59). The A. halodendron population on shifting sandy land and that planted 5 years ago showed growing age distribution, that planted 18 years ago showed stable age distribution, and that on semi-fixed and fixed sandy lands showed declining age distribution. The results proved that A. halodendron populations had different ecological effects on A. halodendron community.

Key words: Soil moisture regime, Boron, Oilseed rape, Utilization efficiency