以2008年初遭受特大冰雪灾害干扰的大明山国家级自然保护区常绿阔叶林为研究对象,分别坡位设计调查样区,样区内采用相邻网格样方法设置调查样地27个,样地总面积为10 800 m2。采用样方收获法测定林地上的粗死木质残体(Coarse Woody Debris,CWD)贮量及其腐解等级特征。结果表明:大明山常绿阔叶林的粗死木质残体贮量为33.142 t/hm2,其中倒木占CWD总贮量的95.75%。各腐解等级的贮量百分比序列为2级(60.8%)〉3级(21.7%)〉4级(13.6%)〉5级(3.9%)。2008年初的冰雪灾害干扰造成大明山常绿阔叶林的非正常CWD贮量骤然增大,高达20.172 t/hm2。
The study on CWD of evergreen broad-leaved forest impacted by serious frozen disaster in 2008 in Damingshan Mountain Nature Reserve was conducted.We determined the storage and decay class characteristics on the forest floor by using sampling plot harvesting method.The results showed that the storage of CWD was 33.142 t/hm2,in which,logs contributed 95.75% of total CWD storage in the forest.The order of the percentage of the storage of each decay class was: class 2(60.8%)class 3(21.7%)class 4(13.6%)class 5(3.9%).The abnormal input of CWD in the evergreen broad-leaved forest of Damingshan Mountain Nature Reserve due to the frozen disaster in early 2008 was 20.172 t/hm2.