冰雪灾害后生态公益林乔木层物种结构变化

The Ecological Public Welfare Forest Tree Layer Species Structure Change after a Snow Disaster

于2008年冰雪灾害后在福建省宁化县水茜乡生态公益林内常绿阔叶林、针阔混交林代表地段设置固定样地,探讨封育对冰雪灾害后的次生幼龄林乔木物种结构的变化。结果表明:经5 a封育,乔木层物种丰富度指数明显增加,自然恢复为以壳斗科、山茶科、樟科、杉科、安息香科等物种为建群种或共建种的次生常绿阔叶林、针阔混交林。随着封育的延续,针阔混交林往常绿阔叶林方向发展,使林分形成一个稳定的顶级森林群落。

In 2008,sample sections were set in evergreen braodleaved forest and coniferous and broadleaved mixed forest in welfare forest of Shuiqian County,Ninghua County,this paper discussed the change of close culture on the secondary young aged forest after the ice disaster,the results showed that the arbor layer species richness degree index increased evidently after 5 years long close culture,the arbor layer species richness index increased significantly,it naturally recovered into the secondary evergreened broadleaved forest and coniferous and broadleaved mixed forest with cupule branch,camellia branch,camphor branch,fir branch,benzoin branch and species as dominant species,with the close culture continue,the needle and broad mixed forest usually developed into the evergreened broad-leaved forest,the stand formed a stable top forest community.