基于药食同源作物紫苏的屋顶绿化模式研究

Study on roof greening model with a medicine and edible homologous crop Perilla frutescens crispa

采用药食同源作物紫苏代替传统绿化植物开展屋顶绿化试验,通过试验屋与对照屋的对比,探究了紫苏屋顶绿化模式的环境效益。结果表明:采用紫苏和复配土进行屋顶绿化时,产生的屋面荷载较低,符合屋顶绿化建筑的安全性原则;紫苏绿化具有很好的隔声降噪及隔热保温效果,同等情况下,试验屋内噪声级相较对照屋平均降低9. 9 d B,白天试验屋内气温最高可降低1. 8℃,夜间则对室内产生0. 5℃的保温效果;紫苏叶片对空气中浮尘具有一定的吸附效果;通过采用具有经济附加值的紫苏开展屋顶绿化,可以有效开发屋顶的经济价值。

The test of roof greening was carried out with Perilla frutescens crispa instead of traditional greening plants. The environmental benefits of the roof greening model were preliminarily analyzed by comparing the test room with the control room. The results showed that the roof load produced by using Perilla frutescens crispa and mixed soil for roof greening was lower, which conformed to the safety principle of roof greening buildings. Perilla frutescens crispa had a good effect of sound insulation, noise reduction and temperature preservation. Under the same conditions, the noise level in the test room was 9.9 dB lower than that in the control room on average. The maximum temperature in the test room could be reduced by 1.8 ℃ in the daytime and increased by 0.5 ℃ in the night. Perilla frutescens crispa leaves had a certain adsorption effect on floating dust in the air. The economic value of roof could be effectively exploited by using Perilla frutescens crispa with economic added value to carry out roof greening.