摘要
在贵州省贞丰县试验区和贵州大学校园进行了构树(Broussonetia papyrifera)枝构件的静态和动态观测,结果表明,构树的枝夹角变化在30～70°,表现为一级枝>二级枝>三级枝;构树枝构件种群形态具高度可塑性,其结构影响着树冠的整体构型,枝长和枝夹角随枝位的升高而减小;一二级枝的分枝率大于二三级枝的分枝率;平均枝条数量,枝长和枝夹角随着年龄的减小而减小;枝从3月中旬随芽的萌发开始生长到8月生长稳定,年生长动态呈"慢—快—慢"的"S"型曲线变化。
Dynamic and static observation was conducted on branches module of Broussonetiapapyrifera at experiment area of Zhenfeng, Guizhou province and in campus of Guizhou University. The result showed that branch angles were between 30° and 70°, and primary branch〉second one〉 the third. Branch module population had high plasticity, its structure influenced canopy form, and length and angle of branches decreased with height of branch. Bifurcation ratio of primary branch was larger than second and third one. The average quantity, length and angle of branches reduced with age. Branch started growing from bud germination in the middle March and stable in August. Dynamic annual growth showed ＂S＂ curve of slow-fast-slow.
出处
《浙江林业科技》
北大核心
2009年第5期34-37,共4页
Journal of Zhejiang Forestry Science and Technology
基金
国家"十一五"科技支撑计划项目(2006BAC01A09)
国家"十一五"科技支撑计划项目(2006BAD03A1006)
国家重点基础研究发展规划项目(973项目)(2006CB403206)资助
关键词
构树
枝构件种群
结构
生长动态
Broussonetia papyrifera
branch module population
structure
growth dynamics
