老帽山阴坡木本植物群落及其与泥石流的关系  

The Relationship between Mud-rock Flows and Plant Communities in Laomao Mountains

作　　者：熊韶峻[1] 牟昀智[2] 白鸿祥[2] 

机构地区：[1]辽宁师范大学生物系 [2]辽宁师范大学地理系

出　　处：《辽宁师范大学学报（自然科学版）》1991年第3期198-206,共9页Journal of Liaoning Normal University:Natural Science Edition

基　　金：1986年辽宁省教委重点科研基金资助

摘　　要：通过对老帽山阴坡木本群落的类型、特征及其土壤生境的考察,以及群落地段小型泥石流发生及成因的分析,发现结构越简单,砍伐干扰越大的群落,其生境越劣化,小型泥石流的频率也越高.并指出过度砍伐造成植物根系生长不良是土壤植被系统稳定性下降乃至发生泥石流的重要原因.根据研究结果,讨论并提出适度性砍伐的“条带式轮回取薪”策略等有关建议。In this paper, a survey is made of the types, characteristics, and soil conditions of broad-leaf plant communities in Laomao Mountains, Liaoning, China. An analysis is also carried out of the small mud-rock flows in the regions of plant communities. The results show that the higher frequence of occurrence of small mud-rock flows is related to those communities that have simplerstruc-1ures, worse soil conditions, poorer diversities and more species with low frequences under strong disturbance of felling. Moreover, because of serious deforestation, poorly developed roots are thought of as the main cause of degrading stability of soil vegetation system and happening of mud-rock flows. It is discussed that the unstability of community is connected with the increase in species with low frequences and the decrease in deversities. And, it is suggested that the quantity of roots in the depth of 50～80cm be used as an index of optimum for felling. In the end, a strategy of selective felling in stransect manner is put forward.

关 键 词：老帽山 植物群落 泥石流 木本 根系 

分 类 号：Q948.158[生物学—植物学]