秦岭华北落叶松人工林群落结构及物种多样性

根据野外样方法调查的3个样地资料,应用方差分析和多重比较方法分析,对秦岭华北落叶松人工林群落结构及物种多样性进行了研究.结果表明:(1)秦岭人工华北落叶松林以纯林为主,林下层次结构简单,是以华北落叶松为建群种,悬钩子、苔草为优势种的群落;植物种数是草本层>灌木层>乔木层.(2)该区华北落叶松人工林为中龄林,华北落叶松分布在几个不同的年龄段;相同年龄的华北落叶松胸径有所不同.(3)各层物种á多样性分析结果均显示出草本层>灌木层的特点.

Community structure and species diversity of Larix principis -rupprechtii plantation in Qinling Mountains

Based on the data collected from the 3 sample plots,the community structure and species diversity of the Larix principis-rupprechtii plantation in Qinling Mountains was studied by the methods of one-way ANOVA and multiple comparisons.The results showed that: Firstly,the Larix principis-rupprechtii plantations were mostly pure and simple in the understory structure;the number of plant species showed that herb layer>shrub layer>tree layer;the constructive species of the community is Larix principis-rupprechtii and the dominant species are Rosa rubus and Carex lanceolata.Secondly,the Larix principis-rupprechtii plantation in Qinling are middle aged forest and distributed in different ages;but the same age don't mean the same DBH.Thirdly,Richness index,Diversity index,Simpon index and Evenness index of different layers showed that herb layer > shrub layer in this area.