青藏高原中国沙棘的资源分布格局及其影响因素

青藏高原的中国沙棘（Hippophae rhamnoides L．subsp．sinensis Rousi．）集中分布于高原东北至东南的边缘地带，即从祁连山至横断山脉这一地区。中国沙棘一般适合生长在年降水量400800mm，年均温5～15℃，海拔1000-4000m的山地，年降水量是影响中国沙棘分布的关键因素。本文就中国沙棘在青藏高原地区的资源分布情况及其影响因素等进行论述，并对考察过程中所发现的问题作了初步探讨。

Natural Distribution of Hippophae rhamnoides L. subsp.sinensis Rousi. in Qinghai-Tibetan Plateau and Its Relationships with Main Environmental Factors

H. rhamnoides L. subsp, sinensis Rousi. （RHs） extensively grows in China, it has an excellent effect upon environmental protection and economic development. Habitats of H. rhamnoides L. subsp, sinensis Rousi. are centralized in northeast to southeast edge of the Qinghai -Tibetan Plateau that goes from Qilian mountains to Hengduan mountains. Generally speaking, the annual precipitation of RHs habitats is 400-800mm, the annual average temperature is 5-15℃, the elevation is 1000-4000m; among those environmental factors, the annual precipitation seems to be the most radical one. This paper indicates the natural resources distribution of H. rhamnoides L. subsp, sinensis Rousi. in Qinghai -Tibetan Plateau and its relationships with main environmental factors, it also briefly discusses the problems that we came across during our investigations.