【摘要】 以喀纳斯泰加林主要建群种为研究对象,区分火干扰烈度的情况下,对火后乔木树种的更新数量和质量进行研究,并分析火后乔木的演变趋势。结果表明,（1）喀纳斯泰加林4种建群种在不同烈度火干扰后的更新量不同,西伯利亚落叶松（Larix sibirica）:中烈度(79.29 plant?hm^-2)>强烈度(69.14 plant?hm^-2)>弱烈度(28.33 plant?hm^-2),西伯利亚红松（Pinus sibirica）:中烈度(581.06 plant?hm^-2)>强烈度(439.68 plant?hm^-2)>弱烈度(414.17 plant?hm^-2),西伯利亚云杉（Picea obovata）:弱烈度(832.78 plant?hm^-2)>强烈度(705.11 plant?hm^-2)>中烈度(689.77 plant?hm^-2),疣枝桦（Betula pendula）:弱烈度(148.19 plant?hm^-2)>强烈度(110.67 plant?hm^-2)>中烈度(97.09 plant?hm^-2)。（2）建群种更新变化趋势:西伯利亚落叶松和西伯利亚红松的更新木数量在火干扰后均呈增长趋势;西伯利亚落叶松在中、后期更新木数量增长变快;西伯利亚红松在中、后期更新木数量增长速度稍有下降。西伯利亚云杉则在弱烈度火干扰后更新木数量呈下降趋势;在中烈度火干扰后更新木数量前期呈下降趋势,中、后期呈增长趋势;在强烈度火干扰后前期呈平稳趋势,中、后期呈增长趋势。疣枝桦的更新木数量在弱烈度火干扰后前期呈上升趋势,中、后期呈下降趋势;在中、强烈度火干扰后均呈下降趋势。造成几种树种更新木数量变化的原因是落叶松和红松在泰加林中属于后更新树种,云杉和疣枝桦属于优先更新树种,树种间存在竞争关系。（3）建群种在不同烈度火干扰后更新木数量增加速度均为:强烈度>中烈度>弱烈度。（4）不同烈度不同森林恢复时期乔木更新质量不同,弱烈度下前、中和后期森林更新质量得分:更新最差时（22-20-26）;更新最好时（34-34-32）;平均（30-28-30）。中烈度下森林更新质量评价得分:更新最差时（22-26-24）;更新最好时（34-34-32）;平均（30-28-28）。强烈度下森林更新质量评价得分:更新最差时（22-22-22）;更新最好时（34-34-32）;平均（30-28-26）。通过了解不同火烈度下各树种更新数量、质量和更新速度的变化情况,可为喀纳斯泰加林科学经营和森林加速恢复提供依据。更多还原

【Abstract】 In this paper, the main edificators（constructive species） in Kanas Taiga were taken as the research object. In order to understand the influence of fire disturbance on edificators regeneration, we analysed the quantity and quality of regeneration, and analysed the evolution trend of edificators after fire disturbance. The results were as follows:（1） When the fire severity was different, the quantity of renewal of edificators in Kanas Taiga were different. Larix sibirica: moderate severity(79.29 plant?hm^-2)>severe severity(69.14 plant?hm^-2)>mild severity(28.33 plant?hm^-2), Pinus sibirica: moderate severity(581.06 plant?hm^-2)>severe severity(439.68 plant?hm^-2)>mild severity(414.17 plant?hm^-2), Picea obovata: mild severity(832.78 plant?hm^-2)>severe severity(705.11 plant?hm^-2)>moderate severity(689.77 plant?hm^-2), and Betula pendula: mild severity(148.19 plant?hm^-2)>severe severity(110.67 plant?hm^-2)>moderate severity(91.09 plant?hm^-2).（2） Evolution trend of edificators’ regeneration quantity, Larix sibirica and Pinus sibirica: the quantities of renewal wood showed an increasing trend after fire disturbance. In the middle and late stage, the quantity of Larix sibirica increased faster, but the quantity of Pinus sibirica increased a little slowed down. Picea obovata: the quantity of renewal wood decreased after the mild severity fire disturbance. And it decreased in the early stage after moderate severity fire disturbance, but it increased in the middle and late stage. In addition, it maintained a steady state in the early stage of severe severity fire disturbance, and it increased in the middle and late stage. Betula pendula: the quantity of renewal wood increased in the early stage of mild severity fire disturbance, and it decreased in other cases. Picea obovata and Betula pendula were among the priority regeneration in Taiga, then Larix sibirica and Pinus sibirica belonged to the later regeneration in Taiga. There was a competitive relationship among them.（3） Regeneration rate of edificators after fire disturbance with different intensity: severe severity>moderate severity>mild severity. And（4） the score of regeneration quality of edificators after different severity fire disturbance and different restoration period, mild severity: MIN 22-20-26, MAX 34-34-32, AVG 30-28-30; moderate severity: MIN 22-26-24, MAX 34-34-32, AVG 30-28-28; severe severity: MIN 22-22-22, MAX 34-34-32, AVG 30-28-26. It can provide the basis for scientific management and accelerate forest restoration in Kanas Taiga by understanding the change of regeneration quantity, quality and regeneration speed of edificators under different fire severity.更多还原