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研究了大兴安岭地区不同林型林隙的更新密度、边缘木数量及形成原因,结果表明:1)林隙一般由11~24株落叶松、白桦所形成,平均为16.94株;形成方式主要有立枯、折干和拔根倒,11.8%为折干,35.3%为立枯,41.2%为拔根倒。2)林隙所在坡位中58.9%为中下和下坡位,41.1%为中上坡位。3)在杜香-落叶松林、草类-落叶松林和藓类-落叶松林更新密度所受到的制约因子不同,杜香-落叶松林的林隙更新主要受坡度的影响,草类-落叶松林的林隙更新主要受长短轴比的影响,藓类-落叶松林的林隙更新主要受边缘木数量的影响。
The results showed that: 1) The gap is generally formed by 11 ~ 24 larch and Betula platyphylla, with an average of 16.94, and the formation methods are mainly as follows: Dry, dry and fall root, 11.8% for the dry, 35.3% for the withered, 41.2% for the root fall. 2) 58.9% of the slope where the gap is located is mid-down and down-slope and 41.1% is mid-uphill. 3) The differences in the density of regeneration in the Fraxinus mandshurica-Larch forest, the grass-larch forest and the moss-larch forest vary with the degree of slope, The gap regeneration is mainly affected by the ratio of length to short axis. The gap regeneration in the moss-larch forest is mainly affected by the number of marginal wood.