栽杉留阔模式群落结构及多样性研究

Floristic Composition, Community Structure and Species Diversity Under the Forest of Reserving Broad leaved Tree in Chinese fir Plantation

通过对 30年生栽杉留阔模式及对照的杉木纯林群落植物区系组成、结构及植物种多样性的研究 ,结果表明 ,栽杉留阔模式群落植物共有 57科 1 0 2属 1 38种 ,总植物种数比纯林的多2 7.8%.双子叶植物在群落植物组成中占优势 ,分别占总科数和总属数的 61 .4%和 68.6%.与纯林相比 ,含多个种的科的比例增大 ,而寡种科的比例减小 ,其中含种数最多的茜草科有 9个种 .栽杉留阔模式群落共有 7个亚层 ,层次结构比纯林复杂 ,且各层的物种丰富度均比纯林的高 .乔木层和灌木层的植物种多样性较大 ,群落植物种多样性较高 ,但草本层和藤本层的多样性比纯林低 .说明栽杉留阔经营模式有利于生物多样性的保护 。

A study on floristic composition, community structure and species diversity under the pattern of reserving broad leaved tree in Chinese fir plantation at year of 30 and pure stand of Chinese fir was carried out The results indicated that the pattern of reserving broad leaved tree in Chinese fir stand has a flora of 57 families, 102 generas and 138 species more than that of pure stand, which is dominated by dicotyledon that occupied 61 4% and 68 6% of total families numbers and total generas numbers, respectively Compared to pure stand, this pattern has more figures in amount of families that have multi species, and less in families that has mono species This pattern has more complex community structure with 7 sub layers which each has higher species richness The species diversity of stratum layer, shrub layer and forest community was each higher but that of herbage layer and bine layer each lower than that in control It is concluded, therefor, that reserving broad leaved tree in Chinese fir plantation benefit the conservation of biodiversity that deserves wide spreading