黄土区不同配置人工林物种多样性研究

以黄土高原山西省方山县下昔沟流域为研究点,采用标准样地调查法,应用物种丰富度、Simpson指数、Shannon-Wiener指数、群落均匀度指数研究15种不同配置的人工林的а多样性动态特征,结果表明,在立地条件、密度、林龄相同的情况下,油松和刺槐这两种针阔混交林下的灌、草层Shannon-Weiner index、Pielou index、Richness指数最高,Simpson index最低;纯林中阔叶林下的灌、草层Shannon-Weiner index、Pielou index、Richness指数高于针叶林,但Simpson index低于针叶林;针叶林下的灌、草层Shannon-Weiner index、Pielou index、Richness指数最低,但Simpson index最高。研究结果为：针阔混交林更有利于林下植被的发育和更新,加速黄土区生态系统的恢复。

Research of artificial forest plant diversity under different configuration of loess area

In this work,the species diversity of shrubs and herbs in 15 artificial forests in Xiaxigou,Fangshan County,Shanxi,China were studied using species richness,Simpson index,Shannon-Wiener index and evenness of community.The results show that Shannon-Weiner index,Pielou index and Richness of shrub and herbs were the highest,but the Simpson index was the lowest in Pinus tabulaeformis and Rhobinia Chinensis mixed forest compared with other forests.Shannon-Weiner index、Pielou index、 richness of shrubs and herbs were higher,but the Simpson index was lower in pure broad leaved forest than that in pure coniferous forest.Shannon-Weiner index、Pielou index、richness of shrubs and herbs was the lowest but Simpson index was the highest in coniferous forest.These results suggest that mixed forest is the best for vegetation development and regeneration,and developing mixed forests are the rapid way for restoration of Loess Plateau ecosystem.