| 何国强1，谢良生2，戴耀良3，尹婷辉3，4.100 种园林树木冠径比的初步研究[J].广东农业科学,2017,44(5):57-64 |
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100 种园林树木冠径比的初步研究 |
| A preliminary study on ratio of crown to diameter of 100 kinds of landscaping trees |
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| DOI：10.16768/j.issn.1004-874X.2017.05.010 |
| 中文关键词: 园林树木 自由树 冠径比 树冠 栽植密度 群落结构 生态效益 |
| 英文关键词: landscaping trees open-growing tree ratio of tree’s crown to diameter crown planting density architecture of plant community ecological benefits |
| 基金项目:深圳市城市管理科学研究基金（201617） |
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| 中文摘要: |
| 为探讨城市绿地群落树木密度的合理性，对100 种园林常用树种不同规格的自由树树冠直
径、树干直径进行每木调查，运用Excel 及SPSS23.0 软件对实测数据进行统计分析。结果表明：树木冠径比
（CW／D）与树木的生长习性（针阔叶）、分枝形式没有相关性，与树冠形状密切相关；宽冠形（ 伞形、球
形、广卵形、宽塔形树木） 树木与窄冠形（窄长卵形、长锥塔形）树木、棕榈形树木冠径比差异极显著；窄
冠形树木与棕榈形树木冠径比差异不显著。研究认为：（1）依冠径比大小将园林树木划分为宽冠形、窄冠
形和棕榈形3 个类型便于实际应用。（2）在园林绿地中根据树冠形状及冠径比进行选择与配置树种，有利
于构建合理的群落结构，在绿地群落中参考自由树的冠径比指标进行控制和调整群落密度，更利于植物健
康生长并提高空间利用程度、发挥最大的生态效益。（3）从发挥最好生态效益的角度考量，同一林冠层单
一树种最小株行距参考值d1= D×（CW/D） ÷100；相邻AB 两树种最小株行距参考值d2= 1/2（CW）A+1/2
（CW）B。 |
| 英文摘要: |
| To study the rationality of density of landscaping trees in urban green space，we investigated the
crown width and trunk diameter of 100 kinds of open-growing trees commonly used in landscaping. Data were
analyzed using EXCEL and SPSS 23.0. results showed that the ratio of crown to diameter（ CW/D） did not correlate
with the growth habits or branching of trees（ Coniferous and Broad Leaf Tree）. However，they were closely related
to the shapes of canopy. Wide crowned trees（ e.g. umbrella-type，spherical，wide oval and wide pyramid） showed
significant differences compared to narrow crowned tress（ long and narrow ovate，long tapered tower）and the
Palmaceaes in terms of CW/D ratio（ P ≤ 0.01）. Trees with narrow crown had no significant difference in the CW/D
ratio compared to Palmaceaes. The results suggests that:（ 1） For practical applications，the landscaping trees can be
classified into 3 types according to the CW/D ratio，namely wide crowned，narrow crowned and palm-shaped trees.
（2） Appropriate selection and allocation of trees by their shapes and CW/D ratio in landscaping and greening are
beneficial to constructing reasonable flora structure. After green flora canopied，adjusting the density of flora with the reference of CW/D ratio is constructive to the growth of plants and proper utilization of space for maximizing ecological
benefits.（3）For optimal ecological benefits，the recommended minimum intra-species spacing in the same canopy
is defined as d1 = D×（CW/D） ÷100. Whereas the minimum inter-species spacing follows d2 = 1/2（CW）A +1/2
（CW）B. |
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