北京地区轻型屋顶绿化植被毯多植物配植模式初探

屋顶绿化是构建海绵城市的重要措施之一，轻型屋顶绿化植被毯有着建坪速度快、绿化效果好，便于快速推广等优势，但北京地区目前屋顶绿化植被毯存在植物种类单一、景观效果差等问题。以筛选出的适合屋顶绿化的蒙古百里香(Thymus mongolicus)、垂盆草(Sedum sarmentorsum)、‘胭脂’红景天(Sedum spurium‘Coccineum’)、反曲景天(Sedum reflexum)和白花点地梅(Androsace incana)5 种植物材料，运用对比试验法，以椰丝垫作为基底材料，进行多种植物配植的植被毯试验，通过2、4 cm 2 种基质厚度对比试验，发现4 cm厚基质的5种植物组合大约在施工后47天左右成坪，57天左右成毯。

Preliminary exploration of light vegetated mats for Roof-Greening with multi-vegetation mode in Beijing area

Green roof is one of the important measures for the construction of the sponge city. Light vegetated mats for roof-greening have advantages of rapid construction, good greening effect, fast promotion and so on. But roof-greening mats also have many problems such as single species and poor landscape. A comparative experiment was designed to produce multi-vegetation mats for light roof-greening with Thymus mongolicus, Sedum sarmentorsum, Sedum spurium‘Coccineum’, Sedum reflexum and Androsace incana which were selected as suitable plants for roof-greening, with coconut shred mat as base material, with the peat, loam, perlite and vermiculite as the substrate. Through contrast test between 2 and 4 cm substrate, we found that 5 plants combination with 4 cm substrate took 47 days to form the turf after the construction, and 57 days to form the mat.