植物群落特征变化可以揭示植被演替机理,并在植物对环境变化的适应性方面起着决定性作用。本文对科尔沁沙地不同林龄的(7年、12年、19年和31年)小叶锦鸡儿(Caragana microphylla)群落特征及其平茬抚育后的生长状况的研究表明:小叶锦鸡儿在合理的种植密度下不易受周边个体之间竞争的影响,并越过中龄期依然保持着强大的更新能力;平茬抚育能够控制小叶锦鸡儿的衰退,并有助于更新和提高林下草本生物量,但对植被多样性的影响不明显。
Long term change of plant traits can reveal the mechanism of vegetation succession in a region and plays a key role in evaluation of plant adaptation to habitat change, particularly for the plant revegetated in sandy land. In order to investigate the changes of the traits of Caragana microphylla population in Horqin Sandy Land, a long term series of sample sites of C. microphylla grasslands of 7 years, 12 years, 19 years and 31 years old were setup. Analysis showed that the growth of C. microphylla was not influenced by the competition from the plants and had a relatively high regeneration capacity even after the middle age of this plant in a relatively sparse density. Regular cutting could prevent the growth degradation of C. microphylla and promote the development and biomass production of the grass understory, and there was no influence on the biodiversity during the period of seven to 31 years.
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