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作 者 ：尹航¹;朴顺姬^1,2;王振杰¹;颜秀灵¹;张斌才¹;翟继武¹;丁勇¹

期 刊 ：应用生态学报 2006年 17卷 07期 页码：1169-1173

关键词：差巴嘎蒿；

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.

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.

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