| 小江流域不同人工林群落结构变化及其对侵蚀的控制作用 | |
| 杨吉山 ; 王兆印 ; 余国安 ; 张康 ; 刘怀湘 ; YANG Ji-Shan ; WANG Zhao-Yin ; YU Guo-An ; ZHANG Kang ; LIU Huai-Xiang | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 人工林 群落结构 植物多样性 侵蚀控制 plantation community structure plant diversity erosion control S714 |
| 其他题名 | Community structures and erosion control ability of different plantations in Xiaojiang basin |
| 中文摘要 | 用空间代时间的方法,通过对小江流域不同林龄人工林地的调查,研究了人工林群落结构的变化及人工林对坡面侵蚀的控制作用。以桉树(Eucalyptusspp.)、黑荆(Acacia mearnsii)、银合欢(Leucaena leucocephala)及云南松(Pinus yunnanensis)4种人工纯林为研究对象,采用种类、盖度、重要值、香农-维纳指数等指标,分析了人工林乔木层、次生灌木层、次生草本层植物群落特征变化,讨论了其主要影响因子,并比较了不同人工林对坡面侵蚀的控制作用。结果表明:黑荆及银合欢人工林生长迅速,盖度增长快,控制侵蚀的能力较强;云南松林及桉树林冠层盖度增长较缓慢,控制侵蚀的能力较弱。云南松林下次生植物多样性最高,桉树林下次生植物多样性较高,黑荊与银合欢林下次生植物多样性较低,林下次生植物多样性的发展与乔木层盖度变化关系密切。不同人工林类型在促进植物多样性的发展及控制水土流失方面有明显的差异,应该根据自然条件选择适当的造林树种及配置方式,才能加快生态环境的改善。; Xiaojiang drainage basin locates in the upper reach of Yangtze River,China,and is one of the regions suffering from serious erosion and ecological degeneration due to the climate,geological and geomorphological conditions and the heavy human activities.Reforestation is an effective measure for the ecological restoration,which has been done sine 1980s in the region.Four kinds of pure plantations,i.e.Eucalyptus spp.,Acacia mearnsii,Leucaena leucocephala and Pinus yunnanensis were investigated in the sample plots.Developing processes of species diversity and community structures of the tree layers,secondary shrub layers,and herbaceous layers were studied with the "ergodic hypothesis" method and the indexes of species richness,coverage,importance value and Shannon_Wiener index et al.And erosion control abilities of the four types of plantation were compared in this paper.The study made clear that Acacia mearnsii and Leucaena leucocephala grew faster,and had higher crown coverage and stronger erosion control ability than Pinus yunnanensis and Eucalyptus spp.Pinus yunnanensis had the highest secondary understory biodiversity,and Eucalyptus spp.had higher secondary understory biodiversity than that of Acacia mearnsii and Leucaena leucocephala mainly due to the different characters of the tree layer coverage.Different kinds of plantation had distinct effect in promoting plant diversity and had different erosion control ability.So plantation species selection and association mode should be considered in the process of reforestation for ecological restoration.; 国家水利部公益专项资助项目(2007HSZ0901034); 国家973计划资助项目(2008CB25803) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/60257]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 杨吉山,王兆印,余国安,等. 小江流域不同人工林群落结构变化及其对侵蚀的控制作用[J],2010, 2010. |
| APA | 杨吉山.,王兆印.,余国安.,张康.,刘怀湘.,...&LIU Huai-Xiang.(2010).小江流域不同人工林群落结构变化及其对侵蚀的控制作用.. |
| MLA | 杨吉山,et al."小江流域不同人工林群落结构变化及其对侵蚀的控制作用".(2010). |
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