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薄毛海绵杜鹃是西藏东南部地区高山林线灌丛的优势种,在色季拉山分布在海拔4300～4500 m.通过样地调查和基径结构分析,研究了色季拉山林线薄毛海绵杜鹃种群分布.结果表明:随着海拔升高,薄毛海绵杜鹃种群密度增加而高度降低;在同一海拔,阴坡的种群密度和高度大于阳坡,而基径较小.在阴坡和阳坡,薄毛海绵杜鹃种群年龄结构的峰值均呈“∩”型曲线,中龄级个体较多,幼苗、幼树相对不足.薄毛海绵杜鹃种群的种内竞争呈波浪式发展,强度为阴坡高于阳坡,且存在自疏现象.
The thin sponge rhododendron is the dominant species of alpine forest shrub in the southeastern Tibet, distributed in the Sejila Mountain at an elevation of 4300 ~ 4500 m. Through the investigation of sample plots and the analysis of the base structure, The results showed that with the elevation increasing, the population density of Rhododendron cuneata decreased and the population density of the Rhododendron spontaneum decreased at the same altitude.The population density and height of the shady slope were greater than that of the sunny slope at the same altitude, The results showed that the peak age of the age structure of the thin hair sponge rhododendron showed “∩ ” type curve, more middle-aged individuals, relative lack of seedlings, saplings.The inter-species competition of the cuckoo sponge Rhododendron showed a wave-like development, On the sunny slope, and there is self-sparse phenomenon.