中文摘要：

对科尔沁不同类型沙地上差巴嘎蒿群落内物种重要值、多样性等生态特征进行分析后，将其划分为3个类型：差巴嘎蒿-1年生植物群聚、差巴嘎蒿-禾草类群丛、冷蒿-黄蒿＋禾草类群丛，分别分布于流动、半固定和固定沙地上，随着沙地基质固定程度的增加，差巴嘎蒿群落由差巴嘎蒿-1年生植物群聚（先锋群落、盖度〈10％、多样性指数0．33）演替到差巴嘎蒿-禾草类群丛（盖度30％～35％、多样性指数0．56）再演替到冷蒿-黄蒿＋禾草类群丛（草原群落、盖度40％～45％、多样性指数0．59）．在差巴嘎蒿群落演替过程中，差巴嗄蒿种群年龄结构的变化趋势是：在流动沙地上为增长型；在半固定和固定沙地上为衰退型，人工种植5年后差巴嘎蒿种群年龄结构为增长型，人工种植18年后为稳定型。

英文摘要：

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.