夏蜡梅种群结构与分布格局研究

Population Structure and Spatial Distribution Pattern of Sinocaly-canthus chinensis

摘要:

在夏蜡梅(Sinocalycanthus chinensis)主要分布地设置11个代表性样地,研究了种群结构与空间分布格局,并对种群密度与主要环境因子进行相关性分析。结果表明,大多数夏蜡梅种群幼年阶段的个体较丰富,种群自然更新良好;样地群落夏蜡梅以集群分布为主;在透光率低、林分郁闭的群落中夏蜡梅聚集强度高,但种群更新不良、幼苗缺乏。因此,夏蜡梅适合在相对开敞的遮阴环境下生长,过于郁闭林地应采取适度间伐上层乔木、疏除过密灌木的抚育保护措施。

Abstract:

The population structure, spatial distribution patterns and the correlationship between environment factors and population density of natural Sinocalycanthus chinensis populations were studied. The results showed that there were abundant seedlings at most of investigated plots, which indicated natural regeneration of S. chinensis populations were good. The spatial distribution pattern of S. chinensis in plots was dominated by cluster. Under low light density and high canopy density community, the distribution of S. chinensis tended to high aggregation strength with poor population renewal and lack of seedlings. Therefore, S. chinensis is suitable for growing in opening shade environments, the protection measure of moderate intermediate cutting must be adopted in over crown closure forest so as to cutting upper layer trees and thinning close brushes.