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

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.