大横枝杉优树生长与形质性状关系研究  

Study on the Relationship between Growth and Form Quality Traits of Superior Trees of Large Transverse-branch Chinese Fir

作　　者：程琳 周冠文 陈琴[1,2,3] 覃常丰 陈仕昌 蓝肖 黄开勇[1,2,3] CHENG Lin;ZHOU Guanwen;CHEN Qin;QIN Changfeng;CHEN Shichang;LAN Xiao;HUANG Kaiyong(Guangxi Forestry Research Institute,Nanning 530002,China;Guangxi Key Lab.of Superior Timber Trees Resource Cultivation,Nanning 530002,China;Guangxi Lab.of Forestry,Nanning 530002,China;Huangdong Forest Farm of Babu,Hezhou 542825,China)

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]广西优良用材林资源培育重点实验室,广西南宁530002 [3]广西林业实验室,广西南宁530002 [4]八步区黄洞林场,广西贺州542825

出　　处：《中国野生植物资源》2025年第2期75-80,共6页Chinese Wild Plant Resources

基　　金：广西林业科技推广示范项目(2023GXLK23);广西林科院研究团队项目(2024RT 04);国家重点研发计划子课题(2022YFD2200201-5)。

摘　　要：目的:分析大横枝杉优树形质性状对生长量及其综合值的影响及相关性,为特有种质大中径材培育和利用提供科学的理论依据。方法:从大横枝杉生长量(胸径、树高、材积、无节材长度)、形质指标(树冠率、冠幅、最粗侧枝基径)两方面共7项指标对优树进行多层次分析。结果:经过相关性分析和通径分析,各参试性状之间均具有一定程度的相关性。冠幅对材积、胸径有极显著直接正向作用,对树高有显著直接正向作用;但树冠率对材积、无节材长度有极显著直接负向作用,对胸径、树高有显著直接负向作用。形质性状对大横枝杉生长的影响效应和重要性排序有所不同。冠幅对生长量综合评价值有极显著直接正向作用,但树冠率对生长量综合评价值有极显著直接负向作用,指标重要性排序依次为:树冠率>冠幅>最粗侧枝基径。结论:培育大横枝杉优树理想的形质性状应为树冠率较小、冠幅宽大,大横枝杉形质性状的调控方向是降低树冠率和扩大冠幅。Objective:To analyze the effects and correlations of the form quality traits on the growth and comprehensive evaluation value of large transverse-branch Chinese fir superior trees,and to provide a scientific theoretical basis for the cultivation and utilization of large and medium diameter timber of unique germplasm.Methods:Superior trees were used as materials,multi-level analysis was applied to study seven indicators of growth traits(diameter at breast height,height,volume,length of non-knot timber)and form quality traits(crown ratio,crown width,widest branch diameter).Results:The results of correlation and path analysis showed that there was a certain degree of correlation between the tested traits.Crown width had a very significant direct positive effect on volume and DBH,and had a significant direct positive effect on tree height.Crown ratio had a very significant direct negative effect on volume and length of non-knot timber,and had a very significant direct negative effect on DBH and tree height.The effects and importance ranking of shape and quality traits on the growth were different.The comprehensive evaluation value had a very significant direct positive effect on the crown width,but had a very significant direct negative effect on the crown ratio.The importance ranking of the indicators was:crown ratio>crown width>widest branch diameter.Conclusion:A small crown ratio and a large crown width should be the ideal shape traits for cultivating superior trees.The regulation direction of form quality traits was to reduce crown ratio and expand crown width.

关 键 词：大横枝杉 形质性状 调控 生长 相关性分析 

分 类 号：S791.27[农业科学—林木遗传育种]