珍稀树种长苞铁杉更新特性的研究

STUDY ON NATURAL REGENERATION OF LONGBRACTED HEMLOCK

长苞铁杉是我国特有树种，资源日渐稀少，它在分类上也有争议，虽名为铁杉，却与铁杉属有许多区别，作者作了考证、分析，支持单独成属的观点，学名应为Ｎｏｔｈｏｔｓｕｇａｌｏｎｇｉｂｒａｃｔｅａｔａ（Ｃｈｅｎｇ）ＨｕｅｘＰａｇｅ．本文作者在福建选择三处标准地作了天然更新调查，发现大部天然更新不良，不是种子大小年间隔时间长，就是受林地小乔木、灌木的侵扰，但炼山的采伐迹地则天然更新良好，幼树欣欣向荣，初步揭示了火生态对促进天然更新的机理。

Longbracted hemlock, an endemic tree species of south China, is now in dispute tuxonomically. Authors of this paper analysed this species in many respects, support the legitimate name Nothotsuga,not a true Tsuga.Natural regeneration is very ban by sampling set in the distribution area of Fujisn. Factors influenced the efficiency of regeneration are of Fujian. Factors influenced the efficiencyof regeneration are both, long seed years and f&ilure of competition caused by undergrowth. The authors find out that the natural regeneration is quite well where the habitat is burnt one year before.This discovery implies that the burning ecology iS perhaps a main factor to promote' the natural regeneration somehow in certain mechanism.