东折棱河森林经营所红松混交林的天然更新

Natural Regeneration of Korean Pine Mixed Forests in Dong Zhelenghe Forest Station,Xiaoxing'an Mountains

基于野外标准地调查数据,对东折棱河森林经营所云冷杉红松林、枫桦红松林、柞木红松林和椴树红松林的天然更新进行了研究。采用灰色分析的方法,对影响更新的主要生态因子进行了定性和定量分析。结果表明:红松混交林天然更新受林型、郁闭度、海拔、坡度、光照等因素的影响。随着海拔高度的上升,更新数量呈减少趋势;在一定程度上,郁闭度越大,更新越好。影响其天然更新的重要因子排序为:林木株数>针叶树株数>透光度>郁闭度>海拔>坡度;4种林型林下更新能力强弱的顺序为:枫桦红松林>云冷杉红松林>椴树红松林>柞木红松林。

A study was conducted to investigate the natural regeneration of four Korean pine mixed forests in Dong Zhelenghe Nature Reserve based on the field sample plot data. The effects of major ecological factors on the regeneration were analyzed by using the grey analysis method. Results showed that the natural regeneration of Korean pine mixed forests was affected by the factors such as forest types, canopy cover, elevation, slope, and light availability. The number of naturally regenerated seedlings exhibited a decreasing tendency with increasing elevation. To a certain extent, the greater the degree of can- opy closure was, the better the regeneration was. The quantitative analysis indicated that the order of ecological factors according to their essentialities to forest regeneration was stems per square hectare 〉 conifer number 〉 light transmittance 〉 altitude 〉 degree of canopy closure 〉 slope ; the order of understory regeneration in the four forest types was Betula costata-Pinus koraiensis forest 〉 Picea jezoensis-Abies nephrolepis and P. koraiensis forest 〉 Tilia amurensis-P, koraiensis forest 〉 Quercus mongolica-P. koraiensis forest.