摘要
为了解城市景观绿化红竹林立竹秆形年际变化规律,对高密度全梢竹一次成景栽植,不实施人工干扰,2005年11月营造的红竹林2007-2009年出笋成竹的立竹胸径、枝下高、全高、胸高壁厚和平均节间长进行了调查。结果表明:随着造林年限的延长,立竹胸径逐年显著增大,而相邻年际间立竹胸径增幅趋于降低;立竹枝下高、全高与立竹胸径呈线性增长关系。立竹相对枝下高、相对全高总体上随造林年限的延长而降低,但不同年度立竹间无显著差异;立竹胸高壁厚随立竹胸径的增大而增大,变化幅度较立竹胸径缓慢,不同年度立竹的相对胸高壁厚差异不显著;随造林年限的延长,立竹平均节间长增大,相对平均节间长减小。不同年度立竹的平均节间长与立竹胸径的差异性表现不一致,相对平均节间长不同年度立竹间无显著差异。
To study the regulation of annual change of culm shape for urban landscape forest of Phyllostachys iridescens,experiment was conducted on undisturbed Ph.iridescens forest planted without topping in 2005 with density of 2-3 bamboos/m2.Investigation were made on DBH,clear bole height,total height,wall thickness and average internodes length of new bamboo in the stand during 2007-2009.The result showed that DBH of new bamboo increased annually,while increased range at adjacent years tended to decline with the years of afforestation.Relation among clear bole height,total height and DBH presented a linear growth.With years of afforestation,relative clear bole height and total height decreased gradually,but it had no significant difference among different-aged new bamboos.Wall thickness of new bamboo increased with DBH,while increased range was smaller than that of DBH and no significant difference was found among different aged bamboos.Average internodes length of new bamboos increased with years of planting,but relative average internodes length decreased.The difference was not unified between average internodes length and DBH,and no significant difference was found among them in adjacent years.
出处
《浙江林业科技》
北大核心
2010年第6期62-65,共4页
Journal of Zhejiang Forestry Science and Technology
基金
国家科技富民强县专项行动计划"龙游县竹产业水平提升关键技术集成与推广"(2008471)
关键词
红竹
立竹胸径
立竹全高
立竹枝下高
胸高壁厚
节间长
Phyllostachys iridescens
DBH
total height
clear bole height
wall thickness
internodes length
