广西银竹老山资源冷杉种群退化机制初探

A preliminary study on degenerate mechanism of the population of Abies ziyuanensis in Yinzhulaoshan,Guangxi

资源冷杉是我国特有的珍稀濒危植物,局限分布在广西资源的银竹老山和湖南新宁的舜皇山。对银竹老山资源冷杉种群衰退状况的研究结果表明,导致资源冷杉种群退化的首要因素是发生频率高、影响范围广、持续时间长的人为砍伐破坏其所依存的森林环境以及其分布地的集中放牧,其次是它自身生物学特性的限制,也造成在自然状态下出现其种群数量不易扩大的局面。要实现资源冷杉种群的保护,解除其濒危状态,以免绝灭,必须立刻停止人为干扰,并进一步加强对它繁育系统的研究。

Abies ziyuanensis is an endemic and endangered plant in China,locally distributes in Yinzhulaoshan of Guangxi and Shunhuangshan of Hunan Province.- The degrade mechanism of Abies ziyuanensis in Yinzhulaoshan was investigated in this study. The results show the first factor that brings the degenerate of Abies ziyuanensis population is its habitats being destroyed and the concentration grazing which is frequent,great area and long sustained time. The second one is its biological characters, which also brings that the population growth of Abies ziyuanensis is difficult in natural conditions. Based on these,it is thought that,to protect the population of Abies ziyuanensis, change the endangered status and refrain from extinct, we should stop the disturbanceo f human being immediately. Besides, it is essential to enhance the research on its breeding system furtherly.