| 摘要: |
| 城市绿地地下空间开发对解决城市建设与绿化用地之
间的矛盾至关重要，覆土厚度作为其重要参数指标，对园林植物
生长和工程建设成本具有重要的影响。通过不同覆土厚度(0.5、
1.0、1.5m)处理与地面对照下北京城市5种常见园林植物地上部
及其根系生长的多年监测与分析发现以下几方面。1)与地面对照
相比，0.5m覆土处理与1.0m覆土处理明显限制了速生树种洋白
蜡的地上部生长；但各覆土处理未明显限制生长速率较慢的油松
和紫薇的生长；而0.5m覆土处理明显限制了灌木类(大叶黄杨与
金银木)的地上部生长。2)植物生长5年后，所有覆土处理中的植
物根系均已到达种植池底部，且0.5m覆土处理的粗根分布密度
明显高过其他处理，表现出一定程度的根系相互压迫与横向生长
现象。乔木根系生长随着覆土年限的推移将会受到不利影响。 |
| 关键词: 风景园林 覆土厚度 园林植物 地上部生长 根
系 北京 |
| DOI： |
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| 基金项目: |
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| On the Influence of Soil Thickness on the Growth of Urban Garden Plants |
| GUO Lina,JI Peng,SUN Hongyan,SHI Shengwei,XIE Junfei |
| Abstract: |
| The underground space development of urban green space is
crucial to solve the contradiction between urban construction and green
land. As an important parameter indicator, soil thickness has an important
influence on the growth of landscape plants and the construction cost.
Through years of monitoring and analysis of aboveground and root
growth of five common garden plants in Beijing under different soil
thickness (0.5m, 1.0m, and 1.5m) and ground control, it was found that:
1) Compared with the ground control, the 0.5m soil thickness treatment
and the 1.0m soil thickness treatment significantly restricted the
aboveground growth of the Fraxinus pennsylvanica, a fast-growing
species; but soil thickness treatments did not significantly restrict the
growth of Pinus tabuliformis and Lagerstroemia indica, the species
with slower growth rate; moreover, the 0.5m soil thickness treatment
has obviously limited the aboveground growth of shrubs such as Buxus
megistophylla and Lonicera maackii. 2) After 5 years of plant growth, the
roots of plants in all treatments and ground control reached the bottom of
the planting pond. The distribution density of coarse roots in the 0.5m soil
thickness treatment is significantly higher than that of other treatments,
showing a certain degree of root mutual compression and lateral growth.
The root growth of trees will be affected as the years. |
| Key words: landscape architecture soil thickness garden plant aboveground growth root growth Beijing |
