云南红豆杉的濒危成因剖析

在介绍红豆杉属植物的用途和我国云南红豆杉的天然资源状况的基础上，从（1）生物因素：繁殖特性障碍，幼苗与幼树期生长特性障碍；（2）环境因素：林分特性障碍，原生环境条件障碍；（3）鸟鼠和人为因素三个方面分析了导致云南红豆杉处于濒危状态的原因。以此提出了就地保护、迁地保护结合种源收集和资源发展结合利用的云南红豆杉三项有效保护性措施。

Analysis of the Endangered Causes of Taxus yunnanensis

The uses and the natural resource state of Taxus yunnanensis in China were introduced,and the causes making Taxus yunnanensis endangered were analyzed in three respects:biological factors including obstacles both in propagation characteristics and in the growing characteristics at the stage of seedling and young tree,environmental factors including obstacles both in the stand characteristic and in the primary environment conditions,and the factors of bird,rat and human.According to the cause analysis,three measures,in situ conservation,ex situ conservation combined with provenance collection,and resource development combined with utilization,were worked out in order to protect Taxus yunnanensis effectively.