|
| A preliminary study on ratio of crown to diameter of 100 kinds of landscaping trees |
| |
| DOI：10.16768/j.issn.1004-874X.2017.05.010 |
|
| Hits: 2581 |
| Download times: 1656 |
| Abstract: |
| 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. |
|
View Full Text
View/Add Comment Download reader |
