岷山中段高山峡谷区主要森林群落林下植物多样性研究

摘要

基于野外样地调查数据,应用Margalef丰富度指数(R)、Shannon-Wiener多样性指数(H)、Pielou均匀度指数(J)与Simpson优势度指数(D)对区内10种主要森林群落林下植物多样性进行研究.结果表明:不同森林群落林下灌木和草本植物种类组成及其多样性存在明显差异,林分郁闭度影响林下植物种类组成和多样性;不同森林群落林下植物多样性表现为常绿落叶阔叶混交林＞阔叶林＞人工林;不同森林群落植物多样性指数均表现为草本层＞灌木层.建议在本区山地恢复重建中,以营造混交林为宜,注重常绿与落叶树种搭配,在选择树种时应优先考虑选择与其自然分布相适应的乡土树种.%Based on the field survey data,the application of Margalef richness index,Shannon-Wiener diversity index,Pielou evenness index and Simpson dominance index were studied in the area in 10 kinds of main forest community in understory plant diversity.The results showed that the species composition and diversity of understory shrubs and herbaceous plant presented significant differences in different communities,canopy density had a significant influence on species composition and diversity.The species diversity of understory in forest communities presented as evergreen and deciduous broadleaved mixed forest ＞ broadleaved forest ＞ plantation.The species diversity index of different forest communities basically presented as herb layer ＞ shrub layer.Vegetation restoration in the mountain area should be mixed forest forestation,evergreen tree species and deciduous tree species collocation at the planting.Tree species should be selected native tree species that suitable for environmental characteristics and altitude.