神农架地区米心水青冈萌枝过程的研究  

STUDY ON THE SPROUTING PROCESS OF FAGUS ENGLERIANA IN SHENNONGJIA MOUNTAINS

作　　者：贺金生[1] 陈伟烈[1] 刘峰[1] 

机构地区：[1]中国科学院植物研究所

出　　处：《植物生态学报》1998年第5期385-391,共7页Chinese Journal of Plant Ecology

摘　　要：米心水青冈是水青冈属３种多主干的树种之一，萌枝是它的主要更新方式。本文通过样方法和树木年代学方法对神农架地区米心水青冈的萌枝更新过程进行了研究。结果表明，米心水青冈的萌枝现象是普遍存在的，但萌枝数量不同地点差异较大。９丛米心水青冈完整的年轮分析结果表明，它们萌枝的时间不是连续的，而与森林的受干扰有关。根据８３个圆盘和生长锥芯资料，米心水青冈在萌枝后成长为乔木层或林冠层的过程中，径向生长表现为５种模式，这是根株内竞争的结果。萌枝在米心水青冈林的维持和发展过程中，具有重要的生态学作用。Fagus englerana is one of the three species of genus Fagus with a multistemmed growth form,and vegetative reproduction is the main approach of regeneration of the species. By plot investigation and tree ring chronology, the sprouting process of Fagus engleriana in Shennongjia,Hubei Province, was studied. It was found that Fagus engleriana sprouted vigorously at all research sites, but the number of sprouts varied among those research sites. Based on tree ring chronological analysis of 9 stools of Fagus engleriana , it was revealed that the sprouting was not continous, but related with canopy disturbance. Analysis of 83 disks and increment cores show that there were 5 radial growth patterns after the sprouting origined, resulting from intra stool competition. Sprouting may have played an important role in the maintenance and development of old growth Fagus engleriana forests in the area.

关 键 词：米心水青冈 萌枝 树木年代学 神农架 

分 类 号：S718.4[农业科学—林学] S792.160.1