Factors affecting the snow and wind induced damage of a montane secondary forest in northeastern China
Factors affecting the snow and wind induced damage of a montane secondary forest in northeastern China
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DOI：
10.14214/sf.351
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发表时间：
2006
期刊：
影响因子：
1.8
通讯作者：
Jiaojun Zhu;Xiufen Li;Z. Liu;W. Cao;Y. Gonda;T. Matsuzaki
中科院分区：
文献类型：
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作者：
Jiaojun Zhu;Xiufen Li;Z. Liu;W. Cao;Y. Gonda;T. Matsuzaki
为了解我国东北山地次生林雪害和风害的发生过程，研究了立地条件对雪害和风害的影响，分析了优势树种对雪害和风害的敏感性差异，建立了树木和林分特征与雪害和风害的关系。结果表明，在地形因子中，坡度和土层深度对破坏起着比较重要的作用。各类型组合受害率与优势树种组成呈正相关。林分密度在确定对损害的抵抗力方面也很重要，即，密度大的林分总体受害率较低，但优势树种普遍易受风雪危害。发现4种损伤模式（拔出、柄断裂、冠层损伤和弯曲）与柄锥度密切相关（P拔出（85.3）>柄断裂（80。1)>冠层损伤（65.0）。就树种对伤害的敏感性而言，中桦的拔根率、弯曲率和整体伤害率最高，蒙古栎的树干和冠层的破损率最高，水曲柳的整体伤害率最低。6个主要树种也可根据总体受害率分为两类，敏感性较高的（B. costata、裂叶榆（Ulmus laciniata）和Q.蒙古栎（F.mongolica）和对雪害和风害较不敏感的水曲柳（F.mandshurica）、色木槭（Acer mono）和核桃楸（Juglans mandshurica）。
In order to understand the processes of snow and wind induced damage in a natural montane, secondary forest in northeastern China, we examined the impacts of site conditions on the snow and wind damage; analyzed if the dominant tree species differed in their susceptibilities to the damage; and established the relationships between the characteristics of tree and stand and the damage. The results indicated that in regard to the topography factors, slope steepness and soil depth played a relatively important role for the damage. Damage ratios of all types combined were positively related with the composition of dominant tree species. The stand density was also important in determining resistance to the damage, i.e., the densely populated stand exhibited less overall damage ratios; however, the dominant tree species were commonly damaged easily by the snow and wind. Four damage modes found (uprooting, stem breakage, canopy damage and bending) were closely related to the stem taper (p uprooting (85.3) > stem breakage (80. 1) > canopy damage (65.0). In regard to differences in tree species' susceptibilities to the damage, Betula costata exhibited the most uprooting, bending and overall damage ratios; while Quercus mongolica showed the highest breakage (both stem breakage and canopy damage) ratio, and Fraxinus mandshurica exhibited the least damage ratio (overall). The major six tree species could also be divided into two groups according to the overall damage ratios, i.e., more susceptible ones (B. costata, Ulmus laciniata and Q. mongolica), and less susceptible ones (F mandshurica, Acer mono and Juglans mandshurica) to the snow and wind damage.