西藏波密古乡地区的主要植物群落及其垂直分布

    本文讨论了西藏波密古乡地区的主要植物群落及其垂直分布。     1．根据小带间植物种类相似系数情况，将波密古乡地区南、北坡划成八个植物垂直带     (图1)。        2．描述了七个不同性质的植物群落。各群落分布与水热条件之间的相互关系如图2所     示。    3．由于不同水热条件的影响，各植被带间在植物种数上的差异是比较显著的(表3)。

A preliminary study on the major plant communities and its vertical distribution of Guhsiang region in south-eastern Tibet

In this paper, The major plant communities  and its  vertical  distribution  in Guhsiang region of southeastern Tibet are describted as follows:      1.  In accordance with the conditions of coefficient of similarity of the species between narrow belts, the vertical vegetational distribution on the southern and nor- thern slopes of Guhsiang region may be divided into eight zones (fig. 1).      2.  The seven types of plant communities are describted.  The relationships bet- ween the distribution of plant communities and humidity-warmth conditions are shown (fig. 2)      3.  Being affected by different humidity-warmth conditions, the differences bet- ween vegetation zones in numbers of species are rather well-marked (table 3).