摘要
本文根据溆浦县6个人工公益林样地的监测数据,计算了乔木层树种的重要值及不同优势树种组丰富度指数(S)、Simpson指数(D)和均匀度指数(J),检验了不同类型人工公益林之间的多样性指数是否存在显著相关性及6个样地乔木层各指数是否存在显著差异。结果表明:6个样地乔木层总株数为708株,分属19科32属,重要值排名前5的依次为杉木、马尾松、白背叶、盐肤木、油茶;丰富度指数关系为Ⅲ组>Ⅰ组>Ⅳ组>Ⅱ组>Ⅵ组>Ⅴ组;Simpson指数(D)及均匀度指数(J)情况基本一致,为Ⅳ组>Ⅴ组>Ⅵ组>Ⅱ组>Ⅰ组>Ⅲ组;丰富度指数(S)与Simpson指数(D)及均匀度指数(J)相关性不显著,Simpson指数(D)与均匀度指数(J)存在显著的正相关;乔木层平均冠幅差异显著,平均胸径及平均树高差异不显著。
According to six sets of monitoring data from artificial forests in Xupu County,the important value of tree layer species were calculated for advantages of different tree species groups richness index,Simpson index(D)and evenness index(Jsi).At the same time,the correlation on the diversity index among different types of artificial public welfare forests and the differences in the indexes of each arbor layer in the six samples were carried out.The total number of trees in the six plots is 708,belonging to 32 genera and 19 families.The top five trees in importance were Cunninghamia lanceolata,Pinus massoniana,Mallotus apelta,Rhus chinensis and Camellia oleifera Abel.Richness index was ordered as following:Ⅲ group>Ⅰ group>Ⅳ group>Ⅱ group Ⅵ>group>Ⅴ group.Simpson index(D)and the evenness index(J)relationship was ordered as following:Ⅳgroup>Ⅴ group>Ⅵ group>Ⅱ group>Ⅰ group>Ⅲ group.Richness index(S)was not significantly correlated with Simpson index(D)and evenness index(J),while Simpson index(D)was significantly positively correlated with evenness index(J).There were significant differences in the canopy width of trees,but not in the DBH and height of trees.
作者
刘石峰
刘燕英
LIU Shifeng;LIU Yanying(Forestry Bureau of Xupu County,Xupu 419300,Hunan,China)
出处
《湖南林业科技》
2021年第1期55-60,共6页
Hunan Forestry Science & Technology
关键词
人工公益林
优势树种组
乔木层
重要值
生物多样性
溆浦县
artificial public welfare forest
dominant tree species group
arbor layer
important value
biodiversity
Xupu County
