重庆花园式屋顶绿化生态效益的初步研究

A Preliminary Study on the Ecological Benefits of Gardening Roof Greening in Chongqing

为了探讨屋顶绿化的生态效益,2013年7月选取重庆市园林事业管理局花园式屋顶绿化作为研究对象,以无绿化植物的屋顶水泥地作为对照,进行"乔—灌"、"灌—草"和草坪三种不同植物配置模式的气温、空气相对湿度、地表温度和空气中负氧离子含量测定。研究结果表明,屋顶绿化具有重要的生态效益,且不同植物配置模式的生态效益有较大差异。降温幅度为"乔—灌"(3.60℃)>"灌—草"(2.68℃)>草坪(1.43℃),增湿幅度为草坪(29.42%)>"乔—灌"(17.68%)>"灌—草"(9.46%),对地表温度的降低程度"乔—灌"(25.55℃)>草坪(20.67℃);屋顶绿化空气负氧离子含量比对照高33.73 ions/m3。

In order to explore the ecological effects of roof greening, choose the Chongqing Municipal Utilities Administration roof garden greening as the research object, concrete roof as check, to measure temperature, humidity, ground temperature and air negative oxygen ions content of Joe-irrigation, shrub-grass and lawn three different plants configuration mode. The results show that green roofs have important ecological benefits, and different plant configuration mode ecological benefits are quite different. Cooling rate： Joeirrigation （3.60 ℃）〉shrub-grass （2.68 ℃）〉lawn （1.43 ℃ ）; humidifiers range： lawn（29.42%）〉Joe-irrigation （17.68%）〉shrub-grass （9.46%）; degree of reduction for ground temperature （25.55 ℃）〉Lawn （20.67 ℃）; air negative oxygen ions content of roof garden greening above 33.73ions/m^3 than the check.