【摘要】 选择不同密度母树、单株母树和火烧迹地等3种类型的样地,调查了樟子松天然更新苗特征。结果表明:母树密度不同,天然更新苗数量和年龄结构存在明显差异;樟子松天然更新苗年龄结构在时间上具有明显的不连续性,天然更新苗密度因林分类型的差异明显不同,并且和母树立地条件、树龄、空间分布等因素有关。更多还原

【Abstract】 The characteristics of natural regeneration seedlings of Pinus sylvestris var.mongolica have been investigated in the chosen sample area with seed trees at different density,single seed tree and burned area.The results show: because of the different density of seed trees,there is obvious difference at the quantity and age structure of natural regeneration seedlings.The age structure of natural regeneration seedling of Pinus sylvestris var.mongolica can′t be continuous at the time.The density of natural regeneration seedling is different with the different types of forest stand,which is related with site condition,tree age and spatial distribution.更多还原