城市公园绿地植被群落郁闭度与三维绿量对夏季降温增湿效应的影响  

Influence of Canopy Density and Tridimensional Green Biomass on Cooling and Humidification Effect of Vegetation Communities at Urban Green Spaces in Summer

作　　者：徐欣 张兴 高飞 符文君 杨芷毓 刘勇 Xu Xin;Zhang Xing;Gao Fei;Fu Wenjun;Yang Zhiyu;Liu Yong(School of Architecture and Urban Planning,Suzhou University of Science and Technology,Suzhou 215000,China)

机构地区：[1]苏州科技大学建筑与城市规划学院,苏州215000

出　　处：《中国城市林业》2024年第2期10-16,共7页Journal of Chinese Urban Forestry

基　　金：国家自然科学基金青年基金(52008280);黑龙江省科学院双提雁阵项目(STYZ2022ZR01);“十四五”江苏省重点学科建设项目资助(风景园林学)(082240006/002/003);国家自然科学基金青年基金项目(52008280);国家自然科学基金青年项目(52308029);苏州市风景园林学会科研与科普专委会产学研课题“视听交互作用下苏州传统园林游览舒适度提升路径研究”;江苏省双创人才项目双创博士;黑龙江省博士后基金面上项目(LBH-Z23263)。

摘　　要：为充分利用城市公园绿地的降温增湿效应缓解城市热岛,文章基于苏州市典型城市公园绿地植被群落样方的实测,分析植被群落郁闭度和三维绿量等结构指标对夏季降温增湿效应的影响,得到植被群落结构配置的最优阈值。研究表明:不同群落结构的降温效应为乔-草型>乔-灌型或乔-灌-草型>灌-草型>草地型,增湿效应为乔-草型>乔-灌-草>乔-灌型>灌-草型>草地型;郁闭度和三维绿量对降温增湿效应均有明显影响,但郁闭度影响高于三维绿量。建议优先选择乔-草型绿地并合理控制植被群落的郁闭度和三维绿量在一定区间内,即郁闭度为0.4~0.77,三维绿量大于9 m^(3)·m^(-2)。In order to fully utilize the cooling and humidification effect of urban green space to mitigate the heat island effect in cities,the study selects and measures 20 sample plots from the typical vegetation communities in Suzhous urban park green spaces to analyze the influence of structure indexes of vegetation community,such as canopy density and tridimensional green biomass,on the cooling and humidification effect of the communities in summer,and obtains the optimal threshold value of structure configuration of vegetation community.The results show that the cooling effect of different vegetation community structures could be ranked as the arbor-herb community>the arbor-shrub community or the arbor-shrub-herb multilayer community>the shrub-herb community>the herb community.The humidification effect is ranked as the arbor-herb community>the arbor-shrub-herb multilayer community>the arbor-herb community>the shrub-herb community>the herb community.Both the canopy density and the tridimensional green biomass have obvious effects on the cooling and humidification effect of green spaces,but the canopy density has significantly higher influence than the tridimensional green biomass.In this sense,it is suggested that the green space of arbor-herb community with a canopy density of 0.4-0.77 and a tridimensional green biomass≥9 m^(3)·m^(-2)could be prioritized for the greatest cooling and humidification effect.

关 键 词：城市公园绿地 降温增湿 郁闭度 三维绿量 

分 类 号：Q948[生物学—植物学]