【摘要】 在中亚热带天然植被保存较完整的庆元林场千岗坑林区选取６个不同群落类型的样地，分乔木层、灌木层和草本层进行植物群落调查，对调查所得到的数据进行物种多样性指数和群落均匀度等的测算和分析。结果表明：常绿阔叶林和杉阔混交林的物种多样性程度较高；各层次物种多样性表现为灌木层＞乔木层＞草本层；物种多样性程度直接受到群落类型、优势种类优势度、群落发育阶段及郁闲度等方面的影响；从植物物种多样性保存出发，应大力提倡营造多树种常绿阔叶林或杉阔混交林。更多还原

【Abstract】 in Qangangkeng forest zone of Qingyuan farm, where the natural vegetation ofmiddle subtropical zone is Preserved fairly well, six sample plots of diffErent community typeswere selected and investigation was made on their arbor, shrub and grass level. Calculation ofindex of species adVersity and even degree of community showed as follows f The evergreenbroad - leaved forestS and mixed foreSt of Cunninghamis I8ncedta with the broad -- leavedtree species had higher adversity. Species adversity of various levels showed that,shrub>arbor>grass. Degree of species adversity was directly affected by community type, dominantspecies, dominant degree, and developmental stage of community, etc. In odder to protect speciesadversity, evergreen broad -- leaved forest consisted of many tree species and mixed forest ofCunninghamia IanccoI8ta with broad-- leaved trees should be actively advocated.更多还原