延边地区天然赤松林幼树分枝特性研究  

Branching Characteristics of Saplings in Natural Pinus densiflora Sieb.et Zucc.Forests in Yanbian Area

作　　者：金永焕[1] 周莉[1] 代力民[1] 谷会岩[1] 申光日 刘军[3] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [2]吉林省延边林业调查规划院,吉林延吉133000 [3]吉林省长白山国家级自然保护区管理局,吉林安图133613

出　　处：《沈阳农业大学学报》2003年第4期263-266,共4页Journal of Shenyang Agricultural University

基　　金：中国科学院创新项目基金(SCXMSO1O1;SCXZD0101;KZCX2-406) ;教育部留学回国人员启动基金

摘　　要：以延边地区天然赤松林内更新幼树为对象 ,分析幼树的分枝数、分枝概率分布和分枝角的变化动态 ,探讨了赤松幼树的分枝特性及其与微生境的关系。结果表明 :①林隙内赤松幼树轮生侧枝及二级枝条平均分枝数均比生长在林中空地的少 ;②林隙内和林中空地两种生境内 ,赤松幼树的轮生侧枝、二级侧枝的分枝概率分布均有区别 ,分枝数量较少的侧枝的发生概率高 ,而分枝数量较多的侧枝的发生概率相对较低 ;③林隙内的赤松幼树 ,同林中空地的相比 ,树干上轮生侧枝的分枝角均较大且在树干上从下到上变化较小。The branching numbers,branching probability and branch angles of Pinus densiflora Sieb.et Zucc.samplings in two microˉhabitats were compared and the dynamic changes of branch angles were analyzed,the relationships between the branching characterisˉtics and microhabitat were discussed at P.densiflora.natural forests(E129°20′,N42°41′)in Yanbian region of Jinlin Province.The result showed:①The average branching numbers from stem and primary branch of P.densiflora saplings in the canopy gap were fewer than that of in the open area.②The distribution of the branching probability had difference in two microhabitats.The more the branching numbers were,the lower the branching probability was.The fewer the branching numbers were,the higher the branching probability was.③The branch angles of the lateral branches in the canopy gap was bigger comparing with those in the open area.Moreover,it had little variation from bottom to top along the stem.

关 键 词：延边地区 天然赤松林 幼树 分枝特性 轮生侧枝 枝条 林中空地 林隙内 发生概率 生境 

分 类 号：S791.245[农业科学—林木遗传育种]