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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。
Changes in plant community characteristics can reveal vegetation succession mechanisms and play a decisive role in the adaptability of plants to environmental changes. In this paper, we studied the characteristics of Caragana microphylla community of different ages (7 years, 12 years, 19 years and 31 years) in Horqin sandy land and its growth after stubble and tending. The results showed that: Plant density is not easily affected by the competition among neighboring individuals and still maintain a strong ability to update over the middle age. The improvement of planting density can control the decline of Caragana microphylla and help to update and enhance the biomass of understory herbs. However, the impact on vegetation diversity is not obvious.