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研究人为干扰(森林采伐)对长白山红松针阔叶混交林(天然林和择伐林)粗木质残体的影响。结果表明天然林和择伐林的粗木质残体平均材积分别为78.88和41.7m3.hm-2;天然林粗木质残体大部分径级2～40cm,其中倒木、枯立木和伐桩分别占总材积的94%、5.8%和0.2%,择伐林粗木质残体大部分径级11～50cm,其中倒木、枯立木和伐桩分别占总材积的41%、4%和55%。天然林和择伐林粗木质残体的覆盖面积分别为376.2和189.3m2.hm-2;天然林和择伐林倒木腐烂级为E的倒木分别占33.5%和14%。择伐活动明显减少了森林倒木的数量。为促使采伐后的森林能维持原始林粗木质残体的结构特征,现行的森林管理措施应进行必要的调整。
The effects of anthropogenic disturbance (deforestation) on coarse woody debris in a Korean pine coniferous and broad-leaved mixed forest (natural forest and selective deforestation) in Changbai Mountain were studied. The results showed that the average volume of coarse woody debris in natural forest and selective cutting forest were 78.88 and 41.7m3.hm-2, respectively. Most of the crude woody debris in natural forest was 2 ~ 40cm in diameter, including fallen wood, 94%, 5.8% and 0.2% of the total volume. Most of the coarse wood residues in the selective deforestation ranged from 11cm to 50cm in size, with 41%, 4% and 55% of the total volume respectively. The coverage of coarse wood residues in natural forests and selective cutting forests were 376.2 and 189.3 m2 · hm-2, respectively, and 33.5% and 14% in inverted wood with decaying grade E in natural forests and selective cutting forests. Selective logging has significantly reduced the amount of fallen wood in the forest. In order to ensure that the harvested forest can maintain the structural characteristics of crude woody debris, the existing forest management measures should be adjusted as necessary.