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为探讨屋顶绿化的滞尘效应和不同材质的热辐射效应,试验进行了屋顶滞尘试验研究。滞尘测试结果表明:花园式屋顶绿化滞尘量平均为25.1349g/m2,比简单式屋顶绿化滞尘率高约10个百分点。热辐射对比测定得出:裸露屋顶热像值明显高于绿化屋顶,屋顶绿化是缓解城市热岛效应的关键手段。屋顶单一植物绿化,其热像值高于多种植物复层结构群落式绿化;佛甲草等景天属植物的热像值高于草坪地被植物,草坪地被植物的热像值高于乔灌木;植物花体部分的热像值高于叶体部分;枯死植物热像值明显高于活体植物;呼吸蒸腾作用弱的植物热像值高于呼吸蒸腾作用旺盛的植物。
In order to discuss the dust-holding effect of roof greenery and the heat radiation effect of different materials, the roof dust-holding experiment was conducted. Dust removal test results show that: Garden-like green roof dust retention average 25.1349g / m2, than the simple green roof dusting rate of about 10 percentage points higher. The comparison of thermal radiation shows that the thermal imaging value of exposed roof is obviously higher than that of green roof, and the roof greening is the key means to relieve the urban heat island effect. The thermal image value of the single plant on the roof was higher than that of the multi-plant compound structure. The thermal imaging values of the flowers of the genus Sedum were higher than those on the lawn, Tree shrubs; the thermal image value of the plant body part is higher than that of the leaf body part; the thermal image value of the dead plant is obviously higher than that of the living body plant; the thermal image value of the plants with weak respiratory transpiration effect is higher than that of the plant body with strong respiratory transpiration effect.