校园行道树生态效应分析

为了进一步了解校园生态系统中行道树的生态效应,为校园绿化提供理论指导。以延安大学校园内两种行道树为研究对象,以该校先锋广场水泥地为对照,定点定时地观测光照强度、温度和空气湿度,分析比较行道树的生态效应。结果表明:与裸露的广场相比,3条道路的行道树均有明显地降低光强、降低温度和增加湿度的功效,平均遮光率、降温率和增湿率分别为80.2%、21.2%和37.6%。两种树木中以国槐的生态效应最佳,油松次之。这主要与树种的长势及冠幅等有关。因此,应该加强行道树的绿化和管护工作,使有限的校园绿地发挥最大生态效益。

Study on Ecological Effect of Street Trees in Campuses

In order to understand ecological effect of street trees in campuses and provide the theoretic guidance on greening campuses.Two kinds of street trees in campuses of Yan＇an University were selected to measure meteorological factors such as light intensity,temperature and humidity.At the same time comparative observation was conducted at adjacent open cement pavement.The results showed that there were significant difference among three roads in lowering light intensity,temperature and increasing humidity.The mean shading rate,temperature dropping rate and humidity increasing rate were 80.2%,21.2% and 37.6% respectively.The highest ecological effect was Sophora japonica and the lowest ecological effect was Pinus tabulaeformis.Crown range had effects on ecological function of different street trees.The virescence and management should be reinforced for further.