秦岭太白山巴山冷杉种群结构研究  

Study on the structure of Abies fargesii population in Taibai Mountain of Qinling

作　　者：涂云博[1] 王孝安[1] 段仁燕[1,2] 

机构地区：[1]陕西师范大学生命科学学院,陕西西安710062 [2]安庆师范学院生命科学系,安徽安庆246011

出　　处：《陕西师范大学学报（自然科学版）》2009年第3期75-80,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(30070083)

摘　　要：以径级结构代替年龄结构,采用生命表分析、生存分析和多元回归分析的方法,研究了秦岭太白山主要建群种巴山冷杉(Abies fargesii)种群的结构和动态规律及幼苗与环境的关系.结果表明,太白山南北坡巴山冷杉种群的存活曲线均呈DeeveyⅡ型,其种群大小结构合理,幼苗、幼树资源丰富,表现为增长型种群.巴山冷杉幼苗的更新与枯枝落叶层厚度、腐殖质厚度、土壤层厚度和海拔显著相关,特别是与腐殖质厚度和海拔相关性极为显著.海拔高度和腐殖质厚度是巴山冷杉幼苗更新的限制因子.Abies fargesii is an endemic and major constructive species on Qinling.The structure and dynamics of A.fargesii population in Taibai Mountain were analyzed by using the trunk size structure rather than age structure,life table and survival analysis.The relation between the seedling of A.fargesii population and environmental factors was also studied by multivariate regression analysis.The results showed that the survival curves of A.fargesii population on north and south slopes of Taibai Mountain all are inclined to the type DeeveyⅡ.Abies fargesii junior individuals,including seedling and sapling, were relatively abundant.The size structure of A.fargesii population exhibits a growing type.There was a significant correlation between the regeneration of A.fargesii seedling and litter and soil thickness.Humus thickness and altitude have a very significant correlation with A.fargesii seedling.Altitude and humus thickness might be the limiting factors for regeneration of A.fargesii seedling.

关 键 词：秦岭 巴山冷杉 存活曲线 种群结构 

分 类 号：Q145.1[生物学—生态学]