中文摘要：

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41．7m^3·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189．3m^3·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。

英文摘要：

This study investigated the effects of human disturbance （selection cutting） on coarse woody debris （CWD） in Korean Pine and broad-leaved mixed forest on Changbai Mountain. The forests were classified into two categories according to disturbance history： natural forest and selection cutting forest. The average volumes of CWD were 78.88m^3·hm^-2 in natural forest and 41.7 m^3·hm^-2 in selection cutting forest, respectively. In natural forest, 94% of the volume of CWD consisted of fallen logs, 5.8 % of standing dead trees and 0.2 % of cut stumps. Most of the volume of CWD belonged to 2 - 40 cm diameter class. In selection cutting forest, 55% of the volume of CWD consisted of cut stumps, 41% of fallen logs, 4% of stand standing dead tree, Most of the volume of CWD belonged to 11 - 50 cm diameter class. Covered areas of CWD in natural forest and selective cutting forest were 376.2 and 189.3 m^2· hm^-1 respectively. Percentage of fallen logs in E decay class of natural forest and selective cutting were 33.5% and 14% respectively. Selection cutting method reduced fallen logs considerably. To retain the natural forest characteristics of CWD, management strategy should be reconsidered in managing forest.