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Post-fire forest regeneration under different restoration treatments in the Greater Hinggan Mountain area of China

机译：大兴安岭地区不同恢复措施下的火后森林更新

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Forest fire is one of the dominant disturbance factors in boreal forests. Post-fire forest regeneration is crucial to both ecological research and forest management. Three different restoration treatments, namely natural regeneration, artificial regeneration, and artificial promotion, were adopted in the Greater Hinggan Mountain area of China after a serious forest fire occurred on May 6, 1987. Natural regeneration means recovering naturally without any intervention, artificial regeneration comprises salvage logging followed by complete planting, while artificial promotion refers to regeneration by removing dead trees, weeding, and digging some pits to promote seed germination. The objectives of this study were to evaluate and compare the effects of the three restoration treatments and determine which approach is the most suitable for local forest recovery. A field survey was conducted to collect the attribute data, specifically species composition, structural parameters, and leaf area index (LAI), which were analyzed through the analysis of variance and a post hoc test. The broad-leaved species occupied the main component of the forest under natural regeneration while the coniferous species dominated those under the other two treatments. Tree height and diameter at breast height (DBH) were significantly highest for the forest under artificial regeneration, but an insignificant difference was found for crown widths among the three treatments. Significantly highest LAI was observed in forest under natural regeneration. The results suggest artificial regeneration to be adopted in post-fire recovery if the goal is timber production, while natural regeneration to be utilized when focusing on canopy vertical density and species richness. The artificial promotion treatment showed no advantage. This study demonstrated the advantages of limited strategies that can be helpful for local post-fire forest management.
机译：森林火灾是北方森林的主要干扰因素之一。火灾后的森林再生对于生态研究和森林管理都至关重要。 1987年5月6日发生严重森林大火后，在中国大兴安岭地区采用了三种不同的恢复处理方法，即自然再生，人工再生和人工促进。自然再生是指在没有任何干预的情况下自然恢复的过程，人工再生包括打捞后进行完整的种植，而人工促进则是通过清除枯死的树木，除草并挖一些坑以促进种子发芽来进行再生。这项研究的目的是评估和比较三种恢复方法的效果，并确定哪种方法最适合当地森林恢复。进行了实地调查以收集属性数据，特别是物种组成，结构参数和叶面积指数（LAI），这些数据通过方差分析和事后检验进行了分析。在自然更新下，阔叶树种占据了森林的主要组成部分，而在另外两种处理下，针叶树种则占主导地位。人工更新后森林的树高和胸高直径（DBH）最高，但是在三种处理之间，树冠宽度没有显着差异。在自然更新下，森林中的LAI最高。结果表明，如果目标是木材生产，则应在火后恢复中采用人工再生，而在关注冠层垂直密度和物种丰富度时应采用自然再生。人工促进治疗没有优势。这项研究证明了有限策略的优势，这些策略可有助于当地的森林火灾后管理。

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