| 摘要: |
| 植被是影响城市环境中土壤温度降低的主要因素之
一，研究植物群落冠层结构与土壤温度变化特征的关系对探索
城市风景园林小气候营造、减少城市绿地碳排放和缓解热岛效
应具有积极作用。以杭州9种常见竹类植物作为研究对象，分
析了不同竹类植物群落土壤温度的日变化特征，调查了竹类植
物群落结构特征对土壤温度的影响。结果显示，不同竹类植物
群落与对照点相比，其空气温度与土壤温度均存在显著差异。
与对照点相比，竹类植物群落日均气温降低1.5~2.6℃，
5cm深度土壤温度降低3.0~3.8℃，10cm深度土壤温度降
低2.4~3.4℃，20cm深度土壤温度降低2.3~3.0℃。通过
对土壤温度与冠层结构特征指标的相关分析发现，冠层结构特
征对土壤温度变化具有重要的影响。增加叶面积指数和冠层盖
度可以显著降低土壤温度，而增加天空可视因子可以显著增加
土壤温度。研究结果可以为风景园林规划设计中选择合适的竹
类植物提供参考，进而有助于改善城市环境，实现城市可持续
发展。 |
| 关键词: 园林植物 城市环境 竹类植物群落 降温效果 土壤温度 群落结构 |
| DOI： |
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| 基金项目: |
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| Effects of Canopy Structural Characteristicson Soil Temperature of Bamboo Community inSummer |
| WU Renwu,YAN Hai,NAN Xinge,SHI Yan,BAO Zhiyi |
| Abstract: |
| Vegetation is one of the main factors affecting soil
temperature reduction in urban environments. The study on the
effects of canopy structural characteristics on soil temperature of
bamboo community plays a positive role in exploring the creation
of urban landscape microclimate, reducing the carbon emission of
urban green space and mitigating the heat island effect. Here, the
authors investigated the temporal variations of soil temperature in
9 bamboo plant communities in Hangzhou, and their relationships
with the canopy structural characteristics of bamboo plant
communities. The results indicated that significant differences in
air temperature and soil temperature occurred between the bamboo
plant communities and the control site. Compared with the control
site, the bamboo plant communities could reduce the daily air
temperature by 1.5~2.6℃, reduce the soil temperature at a 5cm
depth by 3.0~3.8℃, reduce the soil temperature at a 10cm depth
by 2.4~3.4℃, and reduce the soil temperature at a 20cm depth
by 2.3~3.0℃. The results of correlation analyses between soil
temperature and the indices of canopy structural characteristics
showed that variations in soil temperature depend strongly on
the canopy characteristics. Increasing the leaf area index and
canopy coverage could significantly reduce the soil temperature,
while increasing the sky view factor could significantly increase
the soil temperature. The intent of this work is to provide
reference for making appropriate choices of bamboo plant species
used for landscape design, and in turn, to help improving the urban
climate, and to achieve sustainable urban development. |
| Key words: landscape plant urban environment bamboo
community cooling effect soil temperature canopy structure |
