广东高要南部低丘桉树人工林下植被物种多样性分析  

Analysis of Species Diversity of Understory Vegetation in Eucalypt Plantations at Low Hills in Southern Gaoyao of Guangdong

作　　者：李伟[1,2] 魏润鹏[1,3] 郑勇奇[2] 张翠萍[2] 

机构地区：[1]华南农业大学林学院,广州510642 [2]中国林业科学研究院林业研究所,北京100091 [3]慧霸达生资有限公司

出　　处：《广西林业科学》2013年第3期222-225,230,共5页Guangxi Forestry Science

摘　　要：对广东高要南部低丘桉树(Eucalyptus spp.)人工林林下植被物种进行了调查分析。结果表明,林下植被物种最少有136种以上,分属56科和103属,乔木21种,灌木59种,藤本20种,草本36种,总体ShannonWiener指数为2.26。种群数目大于5%的优势种均为草本植物,其中芒箕(Dicranopteris dichotoma)占绝对优势(46.2%),这是林下植被物种丰富度较高而多样性偏低的主要原因。林下植被物种组成、丰富度和多样性在不同地域之间均有显著的差异,但在林分龄级之间则没有明显的变化。The species of understory vegetation in Eucalypt plantations at low hills in southern Gaoyao of Guangdong were investigated and analyzed. Results showed that there were 136 species at least, which belonged to 56 families and 103 genera. The species included 21 kinds of tree, 59 kinds of shrub, 20 kinds of vine and 36 kinds of herbaceous species with an overall Shannon-Wiener index of 2. 26. Herba ceous species dominated the understory vegetation by contributing more than 5% to the whole population, and among them Dicranopteris dichotoma was the most one （46. 4% ）, which was the major factor for high abundance while low species diversity of understory vegetation. The composition, abundance and diversity of species had significant difference amon~ different areas, but not amonz a^e classes of stands.

关 键 词：桉树 人工林 林下植被 物种 多样性 

分 类 号：S792.39[农业科学—林木遗传育种]