浙江长兴金钱松群落结构特征及其资源保护研究

Study on the Community Structure of Pseudolarix amabilis and Their Conservation of Resource in Changxing County,Zhejiang Province

金钱松属于国家二级重点保护植物,为能科学有效地对该物种进行保护,对浙江长兴县分布的金钱群落特征进行了研究。本研究利用群落调查方法,在浙江长兴县设置18个面积约为100 m2的样圆,调查群落内的物种组成及其结构特征。结果表明,群落内共有种子植物74种,隶属于37科56属;种属组成较为分散,优势科不明显。Raunkiaer频度定律表现为A>B>C>D>E。重要值结果显示位列前六的物种分别为金钱松、毛竹、栗、苦槠、冬青和盐肤木,其值分别为17.48%、15.86%、4.83%、4.81%、4.43%和4.09%。金钱松群落垂直结构可分为4层,层次结构较为简单。随着群落的进一步发展,金钱松优势地位可能会被毛竹及其他常绿阔叶树种所取代;控制竹类植物的扩张,对保护现存金钱松种群有积极意义。

Pseudolarix amabilis(Nelson)Rehd.is the second state key-protected wild plants.In order to protect this species scientifically and effectively,the community structure of P.amabilis was surveyed in Changxing County,Zhejiang province.Based on the method of phytocoenology,18 circle samples were set to disclose the species composition and feature of community.Results indicated that there were 74 species in the community belonging to 37 families and 56 genera.However,the dominant family was not obvious and the composition of species and genus was fragmentary.The law of Raunkiaer showed A>B>C>D>E.Importance value of top six species were P.amabilis,Phyllostachys edulis,Castanea mollissima,Castanopsis sclerophylla,Ilex chinensis and Rhus chinensis,as following 17.48%,15.86%,4.83%,4.81%,4.43%and 4.09%,respectively.The vertical structure of community could be divided into four layers with simple characteristic.With the development of community,the current dominant position of P.amabilis should be replaced by bamboo or other evergreen broad-leaved trees.To protect the present population of P.amabilis,it was significant to control the expand of bamboo.