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对藏东南地区不同坡向及海拔高度下云南松次生林中植物种类、主要物种重要值、植物物种多样性等进行了调查,以揭示云南松次生林中植物空间分布格局。结果表明:样地内共有植物20科32属41种,单科单属单种物种相对较多。云南松的重要值阳坡高于阴坡,随海拔高度的增加而增加;所有植物阴、阳坡重要值均存在一定差异,灌木中阳坡海拔2 100m处拟变缘小檗重要值最高,海拔2 300、2 500m处雅致山蚂蟥重要值最高;阴坡2 100、2 300m处拟变缘小檗重要值最高,2 500m处米饭花重要值最高;阴、阳坡不同海拔高度所有植物中,蕨的重要值阳坡随海拔高度先升高后降低,阴坡随海拔高度上升而下降。物种丰富度指数阴坡高于阳坡,阴坡海拔2 300m处最高,阳坡物种丰富度指数随海拔升高呈下降趋势;物种Pielou均匀度指数、物种Shannon-Wiener、Simpson多样性指数阴坡均高于阳坡,随海拔的上升逐渐降低。
The species of plantation, the value of major species and the diversity of plant species in the secondary forests of Pinus yunnanensis under different aspect and altitudinal altitudes in the southeastern Tibet region were investigated to reveal the spatial distribution pattern of the plants in the secondary forest of Pinus yunnanensis. The results showed that there were 41 species, 32 genera, 20 families, and 20 species, belonging to 32 genera in 20 families. The positive value of Pinus yunnanensis was higher than that of the shady slope, and increased with the altitude increasing. The important values of shade and sunny slope of all plants were different. The important value of the bermudagrass was the highest at 2 100 m above sea level in shrubs, The value of the important value of elephant bermudagrass was the highest at 2 300 and 2 500 m above sea level, the value of berberine pseudo-bermudagrass was the highest at 2 100 and 2 300 m of the shady slope, the highest value of rice flower was the highest at 2 500 m, , The important value of ferns sunny slope with altitude increased first and then decreased, the shady slope decreased with altitude. The species richness index of shady slopes is higher than that of sunny slopes, and the shady slopes are the highest at 2 300 m above sea level. The species richness index of sunny slopes decreases with the elevation increasing. Species Pielou evenness index, species Shannon-Wiener, Simpson diversity index Both are higher than the sunny slope, with the elevation of the gradual decrease.