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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 ,应值得大力推广
The results showed that there were 57 families, 102 genera and 38 species in the broadleaved community of Betula platyphylla, through the study on the composition, structure and species diversity of the 30-year-old Betula platyphylla stand width pattern and the control plant community, , And the total number of plant species was 2 7.8% more than that of pure forest.Dicotyledon plants were dominant in the community plant composition, accounting for 61.4% and 68.6% of the total number and total genera, respectively.Compared with pure forest, The proportion of various families increased, while the proportion of widowed families decreased, of which there were 9 species of Rubiaceae which contained the most species. There were 7 sub-layers in the broad-leaved community of Sugarcane lanceolata, And the species richness of each layer was higher than that of pure forest.The diversity of plant species in tree layer and shrub layer was higher and the diversity of plant species in community was higher, but the diversity of herb layer and vines layer was lower than pure forest. It is worth promoting vigorously to promote the conservation of biodiversity because of the mode of operation of the fir plantation