摘要
为了解杉莲混交林中乳源木莲树冠特征对生长形质及其综合表现的影响规律,利用多目标决策方法评价生长形质综合表现,采用通径分析方法分析了福建乳源木莲人工林中冠幅、冠形率和树冠率与单株材积、胸径、枝下高、尖削度、胸高形数以及生长形质综合表现等6个因子之间的关系,明确乳源木莲树冠形态调控重点与方向并验证。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、冠形率对枝下高有极显著的正向作用,但树冠率对枝下高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显著负向作用。冠幅对胸高形数表现极显著性的负向作用,冠形率对胸高形数有弱度的负向作用,树冠率对胸高形数表现显著正向作用。树冠特征因子间对乳源木莲生长形质性状影响作用与重要性排序不尽相同。促进生长、提高系列干形品质的树冠形态调控重点与方向不尽相同。冠幅、冠形率对生长形质综合表现有极显著的正向作用,但树冠率对生长形质综合表现有极显著的负向作用,因子相对重要性大小排序为冠幅>树冠率>冠形率。培育丰产优质乳源木莲理想冠形应为:首次有着宽大冠幅、其次较小树冠率,以及在宽大冠幅和较小树冠率前提下的狭长冠形的树冠结构。乳源木莲树冠形态调控重点与方向是促进冠幅宽大。
In order to understand the impact rules between canopy characteristics and growth,stem-form,and comprehensive performance of Manglietia yuyuanensis in mixed stands with Cunninghamia lanceolata ,the growth and form quality comprehensive performance were evaluated by the multi-objective decision-making method,relationship between crown size,crown shape rate,crown rate and 6 index factors,i.e.individual volume,DBH,clear bole height,taperingness,breast height form factor,comprehensive performance of growth and form quality for M.yuyuanensis plantation in Fujian Province were analyzed by path analysis to clarify and verify the key points and directions of morphological regulation.The results showed that crown width,crown shape rate had significant positive effect on individual volume,but crown rate had significant negative effect on individual volume.Crown width,crown shape rate had significant positive effect on DBH,but crown rate had significant negative effect on DBH.Crown width,crown shape rate had significant positive effect on clear bole height,but crown rate had significant negative effect on clear bole height.Crown width had significant positive effect on taperingness,crown shape rate had weakly positive effect on taperingness,but crown rate had significant negative effect on taperingness.Crown width had significant negative effect on breast height form factor,crown shape rate had weakly negative effect on breast height form factor,but crown rate had significant positive effect on breast height form factor.The influence and the order of relative importance of canopy characteristics on the growth and form quality indicators of M.yuyuanensis were different.The key point and direction of crown morphology regulation for promoting volume growth and improving stem-form quality were different.Crown width,crown shape rate had significant positive effect on the growth and form quality comprehensive performance,but crown rate had significant negative effect on the growth and form quality comprehensive performance,the order of relative importance of factors was crown width>crown rate>crown shape rate.The ideal crown shape for the high yield and high quality timber of M.yuyuanensis was larger crown width for the first time,followed by relatively small crown rate,and long and narrow crown under the precondition of larger crown width and small crown rate.The key point and direction of crown morphological regulation of M.yuyuanensis was to promote the crown width.
作者
欧建德
吴志庄
康永武
OU Jian-de;WU Zhi-zhuang;KANG Yong-wu(Mingxi Forestry Bureau,Sanming 365200,Fujian,China;China National Bamboo Research Center Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province,Hangzhou 310012,Zhejiang,China;Shaxian Forestry Bureau,Shaxian 365050,Fujian,China)
出处
《西北林学院学报》
CSCD
北大核心
2019年第4期114-121,共8页
Journal of Northwest Forestry University
基金
中央财政林业科技推广示范资金项目(标准化示范[2014]2号)
三明市双创城市示范项目
关键词
乳源木莲
树冠形态
调控
生长
形质
通径分析
Manglietia yuyuanensis
crown morphology
regulation
growth
form quality
path analysis
