中文摘要：

根据祁连山林区青海云杉群落16块样地256个样方的调查结果，对青海云杉群落的植物种类和区系成分的多样性进行了研究，结果表明：青海云杉群落共有维管束植物96种，隶属25科52属；科的分布区类型以世界分布科为主，大部分主产温带；属的分布类型以温带性质居多，共31属59种，占总属数的62．26％，表明了青海云杉群落植物区系的温带性质；随海拔高度的变化，群落中不同林型的种数、属数和科数多样性表现出不同的变化规律，科和属的多样性最大值出现在山杨-青海云杉混交林中，种的多样性最大值出现在圆柏-青海云杉混交林中。

英文摘要：

According to field investigation of 16 sampling plots and 256 sampling squares of Picea crassifolia community in the Qilian Mountains, Gansun Province, this paper analyzed the biodiversity of families and genera flora of Picea crassifolia community. The results show that 96 species of advanced plants belong to 25 families and 52 genera. Among them, 31 genera, 62.6% of the total, belong to temperate zone, which show that Picea crassifolia community has the temperate zone characteristic. However, the number of species, families genera of different forest types changes with altitude. The maximum families and genera richness appear in mixed forest of Populus davidiana and Picea crassifolia ; while maximum species richness appears in mixed forest of Sabina przewalskii and Picea crassifolia.