摘要
通过对龙岩市福建柏〔Fokienia hodginsii(Dunn)Henry et Thomas〕天然林与人工林的种群分布格局、群落结构特征和物种多样性调查研究,结果表明:(1)福建柏种群在龙岩市域内7个县(市、区)分布广泛,现存天然林县域分布71.4%,且毛竹林群落类型占99.2%。综合计算,40a人工林平均胸径19.9cm,比天然林大3.6cm,人工林平均树高14.1m,比天然林高2.4 m,差异显著。(2)天然林群落的物种丰富度(82种)高于人工林群落(26种)。(3)天然福建柏大径级居多,后续资源贫乏;人工林径级与株数呈正态分布。(4)福建柏林分各层次的物种多样性指数均高于人工林,但各层次的Pielou均匀度指数均低于人工林。因此,必须建立龙岩市福建柏种质资源保护体系,并采取福建柏与乡土树种等多树种混交方式造林,以增加群落的物种多样性,使群落层次更加丰富,森林群落结构保持稳定。
The distribution pattern,community structure and species diversity of natural forest and plantation ofFokienia hodginsii in Longyan City were investigated.Result shows that：（1）The population of Fokienia hodginsii is covered in 7counties（cities,districts）in Longyan City,existing natural forest constitute 71.4%in counties and Phyllostachys pubescens communities constitute 99.2%.The average DBH of 40-year-old plantation is 19.9cm,which is 3.6cm larger than that of natural forest;the average tree height of plantation is 14.1m,which is 2.4m higher than that of natural forest;the difference is significant.（2）Species richness（82species）of natural forest community is higher than that of plantation community（26species）.（3）The natural diameter of Fokienia hodginsii is large,and the follow-up resources are poor.（4）The species diversity index of the natural forest of Fokienia hodginsii is higher than that of the plantation,but the Pielou evenness index of all levels is lower than that of plantation.Therefore,it is necessary to establish the protection system of Fokienia hodginsii germplasm resources in Longyan City,and adopt afforestation with mixed tree species such as Fokienia hodginsii and native tree species to increase the species diversity of the community and make the forest community structure more stable.
出处
《防护林科技》
2017年第1期1-7,共7页
Protection Forest Science and Technology
关键词
物种多样性
福建柏
天然林
人工林
林分群落
species diversity
Fokienia hodginsii
natural forest
plantation
stand community
