广西植物2018，Vol.38Issue(3)：361-369,9.DOI:10.11931/guihaia.gxzw201707024
南京市不同纯林群落结构参数与夏季降温增湿效应关系研究
Correlation between community structure parameters of pure forests and temperature reduction and humidity increase in summer
摘要
Abstract
In the early research, the temperature reduction and humidity increase of plants were mainly based on big scale measurement such as green belt and microcosmic research in the scale of leaves in use of photosynthesis equip-ment, ignoring the effects of tree types and structural characteristics of communities in the dimension of quantification. We investigated the correlation among the effects of temperature reduction and humidity increase,canopy porosity and density based on small scale of pure forest,using dummy variable regression analysis.Furthermore,in order to obtain certain conclusion in the range of our research, we also put forward the optimal interval of structural parameter. The results showed canopy density was significantly positively correlated with both temperature reduction and humidity increase. While canopy porosity was positively correlated with temperature reduction and negatively correlated with humidity increase,but there was no significant difference.The pure forests could elaborate maximum function of re-leasing thermal island effect when canopy porosity ranged from 0.81 to 0.85 and canopy density ranged from 0.31 to 0.35. At the same time, we took the types of pure tree as related factors. The results showed there was no significant difference among Liquidambar formosana, Cercis chinensis and Magnolia grandiflora. And we also found significant difference appeared in Cerasus, Acer palmatum, Cinnamomum camphora and Acer palmatum 'Atropurpureum' and Cerasus when it comes to temperature reduction effect.As for humidity increase that the pure forests played,we can see Osmanthus fragrans,Cinnamomum camphora,Acer palmatum'Atropurpureum' showed no difference compared to Mag-nolia grandiflora while there were significant differences between Sapium sebiferum and Cercis chinensis. This study pro-vides a scientific basis for the selection of plant configurations to alleviate the heat island effect through urban greening, and provides a quantitative reference model for the urban green space to mitigate the heat island effect evaluation system, which has far-reaching impact in the ecology field.关键词
纯林群落/热岛效应/郁闭度/疏透度/虚拟变量回归Key words
pure forests/thermal island effect/canopy density/canopy porosity/dummy variable regression分类
农业科技引用本文复制引用
佘思玥,魏家星,王楠琪,贺奕尧,姜卫兵..南京市不同纯林群落结构参数与夏季降温增湿效应关系研究[J].广西植物,2018,38(3):361-369,9.基金项目
国家自然科学基金 (31200530)Supported by the National Natural Science Foundation of China (31200530) （31200530）
