城市带状绿地林型与温湿效益的关系

Effects of the Forest Type of Urban Green Belts on Temperature and Humidity

选择典型带状绿地——北京市元大都城垣遗址公园西土城段3种不同林型绿地及草坪作为研究对象,采用小尺度定量测定的方法,每天8:00—18:00,每2h一次,连续7d同步测定4块绿地及对照的温度、相对湿度值。结果表明:14:00—16:00时段刺槐纯林、油松纯林和刺槐—油松混交林降温幅度最大、增湿幅度最小;经SPSS方差分析(Duncan's两两比较,P=0.05),4块绿地间的温度差异均达到显著水平,湿度差异除刺槐纯林与油松纯林两者外,其余均达到显著水平;草坪具有一定的降温增湿效应,但效果不明显;混交林型绿地降温增湿幅度最大,明显优于纯林。

In this paper,the ecological benefits on urban green belt of Yuan Dynasty Capital City Wall Relics Park in Beijing were investigated in July of 2010,and four green belts included Robinia pseudoacacia,and Pinus tabulaeformis,both of them mixed woodland and lawn,which were studied in this experiment.The air temperature and relative humidity in the same width of green belts were measured once every two hours from 8：00 to 18：00 every day for seven days sequentially.The research showed that three kinds of green belts reached maximum in amplitude on the decrease of temperature,and reached minimum in amplitude on the increase of humidity from 14：00 to 16：00 except the lawn;Base on Duncan＇s paired comparison（P=0.05） ,the differences of air temperature between four kinds of green belts reached significance level,and relative humidity between four kinds of green belts reached significance level except between Robinia pseudoacacia and Pinus tabulaeformis;the lawn had a little effect on the decrease of temperature and unobvious effect on the increase of relative humidity;the amplitude of the mixed woodland on lowering temperature and increasing relative humidity was better than pure forest.