峦大杉树冠特征与生长形质通径分析  

Path Analysis between Canopy Characteristics and Growth,Form Quality of Cunninghamia konishii

作　　者：欧建德 吴志庄[2] 康永武 Ou Jiande;Wu Zhizhuang;Kang Yongwu(Mingxi Forestry Bureau,Sanming 365200,P.R.China;Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province,China National Bamboo Research Center;Shaxian Forestry Bureau)

机构地区：[1]福建省明溪县林业局,福建三明365200 [2]浙江省竹子高效加工重点实验室(国家林业局竹子研究开发中心) [3]福建省沙县林业局

出　　处：《东北林业大学学报》2018年第11期8-11,40,共5页Journal of Northeast Forestry University

基　　金：福建省属公益类科研院所基本科研专项(2011R1013-2);三明市双创城市示范项目(201757)

摘　　要：为了解峦大杉(Cunninghamia konishii Hayata)人工林树冠特征对生长形质的影响程度,利用多目标决策方法进行生长形质综合表现评价,运用通径分析方法分析了福建峦大杉人工林树冠特征(冠幅、冠形率和树冠率)与单株材积、胸径、无节材长度、尖削度、生长形质综合得分等因子的关系。结果表明:冠幅、冠形率对单株材积有极显著的正向作用,但树冠率对单株材积有极显著的负向作用;冠幅、冠形率对胸径有极显著的正向作用,但树冠率对胸径具有极显著的负向作用;冠幅、冠形率对无节材长度有极显著的正向作用,但树冠率对无节材长度有极显著的负向作用;冠幅对树干尖削度有极显著的正向作用,冠形率对树干尖削度有弱度正向作用,但树冠率对树干尖削度有弱度负向作用;树冠特征因子对峦大杉生长形质性状影响作用与重要性不尽相同,冠幅、冠形率对生长形质综合表现有极显著的正向作用,树冠率对生长形质综合表现有极显著的负向作用,因子相对重要性由大到小顺序为冠形率、树冠率、冠幅。因此,培育峦大杉速生丰产优质干材的理想的树冠特征为狭长的冠形和较小的树冠率。We studied impact degree between canopy characteristics and growth,stem-form of Cunninghamia konishii,the growth and form quality comprehensive performance were evaluated by the multi-objective decision-making method.Relationship between canopy characteristics(crown size,crown shape rate,crown rate)and 5 index factors including individual volume,DBH,Length of non-knot timber,taperingness,comprehensive score of growth and form quality for C.konishii plantation in Fujian Province were analyzed by path analysis.Crown width and crown shape rate had a significant positive effect to individual volume,but crown rate had a significantly negative effect to individual volume.Crown width and crown shape rate had a significantly positive effect to DBH,but crown rate had a significantly negative effect to DBH.Crown width and crown shape rate had a significant positive effect to length of non-knot timber,but crown rate had a significant negative effect to length of non-knot timber.Crown width had a significant positive effect to taperingness,crown shape rate had weak positive effect to taperingness,but crown rate had weak negative effect to taperingness.The influence and the order of relative importance of canopy characteristics on the growth and the growth and form quality indicators of C.konishii were different.Crown width and crown shape rate had a significantly positive effect to the growth and form quality comprehensive performance,but crown rate had a significantly negative effect to the growth and form quality comprehensive performance,the descending order of relative importance of factors is crown shape rate,crown rate,and crown width.Therefore,the ideal canopy characteristics for cultivation the fast growing,high yield and high quality timber of C.konishii is a long and narrow crown and small crown rate.

关 键 词：峦大杉 冠幅 冠形率 树冠率 通径分析 

分 类 号：S758[农业科学—森林经理学]