濒危植物景东翅子树的萌生特征

Sprouting Traits of Endangered Plant Pterospermum kingtungense

调查研究了濒危植物景东翅子树种群的起源与萌生特征。结果表明:所调查的4个种群中共记录到景东翅子树99株,其中萌生形成的植株35株,占总株数的35.4%;萌生个体主要处于幼树(D<2 cm)和小树(2 cm≤D<5 cm)阶段,二者占全部萌生个体的85.7%。景东翅子树萌生更新的方式主要是根部萌生和干基萌生2种。4个种群平均的萌生百分比为59.2%,萌生个体萌生的平均茎数为2.8个。景东翅子树萌生的方式和萌生能力的大小与人为干扰的状况与关。萌生在干扰条件下景东翅子树种群的恢复和维持中起到了重要的作用。

The population derivation and sprouting characteristics of endangered plant Pterospermum kingtungense were studied.A total of 99 individuals were recorded in four investigated populations.The number of sprouts is 35,accounting for 35.4% of the total individuals.The sprouts primarily occur in saplings（diameter at breast height（DBH） 2 cm） and small trees（2 cm≤DBH5 cm）,taking up 85.7% of the total sprouts.The main sprouting modes of P.kingtungense are root sprouting and stem sprouting.The average proportion of sprouting individuals to all the individuals in the four populations is 59.2%,while the number of sprouts per sprouting individual is 2.8.Sprouting modes and capacity of P.kingtungense are related to forest disturbance regime.The sprouting ability of P.kingtungense plays an important role in the restoration and maintenance of its populations under disturbances.