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.