白龙江流域珍稀,特有植物的多样性及其保护

位于甘肃省南部的白龙江流域，以其特殊的地理位置和气候条件，是甘肃植物种类最多，珍稀，特有植物分布最集中的地区。据初步统计珍稀植物９０种，隶属于４３科８３属，其中列为国家重点保护有３８种，省级保护的２２种，中国特有属４１属，占我国特有属的１６％，占甘肃产中国特有属的８５．４％，特有种６２种，白龙江中，下游乃是甘肃珍稀及特有植物最集中的分布地区，也是生物学多样性最丰富和关键的地区。

THE DIVERSITY AND PROTECTION OF PRECIOUS RARE, ENDEMIC PLANTS IN BAILONG RIVER BASIN,GANSU PROVINCE

As the Bailong River Basin in the south of Gansu has its special geographical situation and olimatic condition,it is an area where plant species are very abundant with many precious,rare,endemic plants.According to preliminary statistics,there are 90 precious and rare kinds of plants,belonging to 43 families and 83 genera.Among them 38 species are protected on the state level and 22 species on the provincial level.41 endemic genera are peculiar to China,occupying a percertage of 16% of the total Chinese endemic genera and 85.4% of the Chinese endemic genera in Gansu.There are 62 endemic species in Bailong river basin where endemic species are richest.It can be concluded that the middle and lower reaches of the Bailong river is a diversely populated region of precious,rare and endemic plants