摘要
为研究不同观赏树种的降温增湿效果,试验选取武汉城区公园绿化设计使用率较高的三种观赏树种桂花、日本晚樱、垂丝海棠为研究对象,通过对其影响范围内的大气温度和相对湿度进行连续定点观测,对比分析各时段试验点和对照点的温湿度数据,来研究不同树种对周围环境温湿度的影响。研究发现:长势相近的三种观赏树种均具有一定的降温增湿效应,与公园水泥地面对照点相比平均降温率为4.3%~5.6%,平均增湿率为3.7%~7.9%,且降温增湿效果桂花>垂丝海棠>日本晚樱;三种树种影响范围内气温日变化呈“单峰型”变化趋势,1天中10∶00~12∶00时段降温效应最大;相对湿度日变化趋势与气温刚好相反,12∶00~14∶00时段增湿效应达到最大。三种树种降温增湿效应大小不同可能与树冠面积、叶片密度和生长习性相关。
In order to study the effects of ornamental trees on microclimate of Wuhan park,three common ornamental tree species,Osmanthus fragrana,Cerasus serrulata,Malus halliana Koehne,were taken as the research objects.The atmospheric temperature and relative humidity in the shade center of the tree were continuously observed at fixed points.The results show that:the three ornamental trees with similar growth have a certain cooling and humidifying effect,and the average cooling rate is 4.3%~5.6%,and the average humidification rate is 3.7%~7.9%,and the cooling and humidifying effect of Osmanthus fragrans>Malus halliana>Cerasus serrulata;the diurnal variation of temperature within the influence range of three tree species presents a“single peak”trend,and the temperature reduction effect from 10∶00 to 12∶00 AM is the largest in one day.The diurnal variation trend of relative humidity is just opposite to that of air temperature,and the humidification effect reaches the maximum at 12∶00~14∶00 PM.The difference of cooling and humidifying effects of three trees may be related to crown area,leaf density and growth habit.
作者
邓永成
王建强
聂超仁
Deng Yongcheng;Wang Jianqiang;Nie Chaoren(Wuhan Institute of Landscape Architecture, Wuhan 430081)
出处
《湖北林业科技》
2020年第6期40-43,共4页
Hubei Forestry Science and Technology
关键词
公园绿化
观赏树种
降温增湿
大气温度
相对湿度
park greening
ornamental trees
reducing temperature
increasing air humidity
air temperature
air humidity
