摘要
利用非线性回归方程分析了8种落叶树种的当年枝变异格局,发现了两种典型的结构变异模式。在7个树种中(三角枫、元宝枫、七叶树、银杏、紫叶李、日本晚樱和国槐),枝条的功能分化明显,其短枝的主要功能是获取光能,而长枝的主要功能是扩展空间,表现出叶展系数随枝长的增加而呈现出指数型递减,这种递减趋势在银杏和紫叶李中尤其明显;另1种苦楝中,枝条的功能分化不明显甚至缺失,其叶展系数随枝长的增加而表现出线性递增。
Variation patterns in current shoot structure in eight deciduous tree species were studied by nonlinear regression equation.Two patterns were found in the eight tree species in seven species(Acer buergerianum,A. truncatum,Aesculus chinensis,Ginkgo biloba,Prunus cerasifera cv.Atropurpurea,P.lannesiana,and Sophora japonica),leaf display indeces(LDI) decreased exponentially with shoot length(SL),suggesting that short current shoots were favorable to light-capture over space-acquisition,and vice versa for long ...
出处
《西北林学院学报》
CSCD
北大核心
2008年第4期45-51,共7页
Journal of Northwest Forestry University
基金
国家林业科技支撑计划:"生态经济型防护林体系空间配置与结构设计技术研究"(2006BAD03A0205)
关键词
树体结构
当年枝变异格局
叶展系数
枝长
当年枝功能
tree architecture
variation patterns in current-year shoot structure
leaf display index
shoot length
shoot function
