不同林龄杉木人工林林下植被分布格局及其影响因素
首发时间:2020-11-03
摘要:林下植被是植物多样性的重要组成部分,有利于养分循环和能量流动。探索林下植被分布格局及其影响因素,对于人工林保护和森林生物多样性的维持机制的研究具有重要意义。本研究使用空间替代时间的方法,建立亚热带一代杉木人工林的5个年龄序列样地:5、8、21、27、40 年,研究其林下植被物种多样性对光、土壤养分等环境因子的响应。结果表明,林龄显著影响灌木层植被盖度和丰富度、草本层植被盖度及苔藓层植被丰富度。土壤总磷、速效氮、光的可利用性和异质性受到林龄的显著影响。土壤总碳和总氮是影响灌木植被盖度和多样性的重要环境因子。光的可利用性是影响草本层植被丰富度的重要环境因子。速效磷是影响苔藓层植被丰富度的重要环境因子。
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The effect of environmental factors on understory vegetation in Chinese fir plantation
Abstract:Understory vegetation comprises a vital component of plant diversity and contributes to nutrient cycling and energy flows. Exploring how distribution patterns of understory vegetation response to environmental factors is importance for forest protection and biodiversity conversation. We used the method of space instead of time to examined the effects of light and soil nutrients on understory diversity in the first rotation of Chinese fir plantations at the ages of 5, 8, 21, 27, and 40 years in subtropical China. The results showed that stand age significantly affected the shrub plant cover and richness, herbaceous cover and moss species richness. Soil total phosphorus, available nitrogen, light availability and light heterogeneity were significantly affected by stand age. Soil total carbon and nitrogen were major environmental factors affecting the shrub species coveThe effect of environmental factors on understory vegetation in Chinese fir plantationr and richness. The light availability was an important environmental factor affecting the herbaceous cover. Soil available phosphorus was a major environmental factors affecting moss species richness.
Keywords: understory vegetation soil nutrient light plantation stand age
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