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作 者 ：武小钢;郭晋平

期 刊 ：武汉植物学研究 2009年 27卷 2期 页码：165-170

关键词：关帝山；华北落叶松；大小级结构；空间分布格局；

Keywords:Guandi mountain, Larix priucipis-rupprechtii, Size structure, Spatial distribution pattern,

摘 要 ：华北落叶松(Larix principis-rupprechtii)是分布于华北山地半湿润地区针叶林的主要建群种之一。从种群的大小级结构、空间分布格局及动态等方面,研究了关帝山采伐迹地上华北落叶松天然更新种群的数量特征与空间格局。结果表明:(1)华北落叶松幼苗幼树缺乏,2.5cm < DBH ≤17.5cm的个体数量丰富,DBH>17.5cm个体数量稀少,种群表现为衰退型,但华北落叶松较长的生命周期、数量丰富的中小径级个体和客观存在的林冠干扰,使得其依然可发展成为稳定的种群;(2)采伐迹地上华北落叶松幼苗幼树多为集群分布;2.5cm<DBH≤7.5cm的林木在2 m×2 m的尺度下呈显著的集群分布,而随取样尺度增大,聚集性减弱,趋于随机分布;7.5 cm < DBH ≤ 17.5 cm的林木在各个取样尺度基本上呈随机分布,这与其自身的生物学特性和环境光照条件密切相关。

Abstract:Lurix priucipis-rupprechtii is one of main constructive tree species of conifer forest which is dis-tributed in semi-humid region,north China. The population structure and spatial pattern of different size classes were studied in a natural regeneration stand which lies in a clear-cut strip. The results revealed that Larix principis-rupprechtii population trends decline for the shortage of seedling and sapling. But the population has the potential to be stable in respect that long life span,abundant trees of middle size class and disturbance. The seedlings and saplings were clumped. Trees of 2. 5 cm&#8804;>Larix principis-rupprechtii was related to itself biological characteristics and light.

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