长白山红松针阔混交林中倒木的分布格局

Effect of Fallen Tree on Natural Regeneration in Korean Pine-deciduous Mixed Forest of Changbai Mountain

红松针阔混交林是我国东北东部山地稳定的地带性天然森林植被．开展其倒木的研究，不仅能有效地监测红松针阔混交林的动态，而且能加深倒木生态功能的认识，为合理管理倒木资源提出对策．通过研究得知，风害是长白山红松针阔混交林林木死亡的主要原因，红松阔叶林有５０％的死亡木是由于根拔、干折和冠折等风害造成的；阔叶红松林风害导致的死亡占３６．８４％，倒木的年输入量，红松阔叶林小于阔叶红松林．倒木的分布方向与主风方向关系不大．

The research showed that the main way which log influenced natural regeneration in Korean pine-deciduous mixed forest was to form various gaps by windfall and tree upright death,then created good sun-shine,nutrients and water condition for regeneration,The fallen trees were important component in Koreanpine-deciduous mixed forest ecosystem and suggested the logs should be kept in forest in Changbai mountain. Finally,the paper also gave some suggestions for the log rational management in Korean pine-decidoous mixedforest which mainly produced timber.