The invention discloses a substrate prescription of a light-weight roof
afforestation prefabricated
sedum polytrichoides carpet and an application of the substrate prescription in preparing
fibrous root system plant culture. The substrate prescription comprises grass carbon,
perlite and palm thread, wherein the volume ratio of the grass carbon, the
perlite and the palm thread is 2-6:1-3:0-2; the
perlite is expanded perlite and has the expanding times K0 being larger than 5-15 times, the volume weight being smaller than and equal to 80kg / m<3>-200kg / m<3>, the
silicon dioxide content of 60-70 percent and the
water content of 4-6 percent; the palm thread has the length of 2-10cm, and is 17 percent of the total volume of the substrate; the palm thread has the length of 2-6cm and is 22 percent of the total volume of the substrate; the volume ratio of the grass carbon, the perlite and the palm thread is 4:1:1; the volume ratio of the grass carbon, the perlite and the palm thread is 6:1:2; the length and the width of the prefabricated
sedum polytrichoides carpet are respectively 40cm, and the thickness of the substrate is 2.5cm; and the substrate prescription is applied to the preparation of
root system plant during cultivation. The substrate prescription can be widely applied to sloping roofs and sheet
flat roof decks in various forms, is convenient, simple and rapid during transportation, spreading or
plant material replacement, saves time, improves efficiency and can prevent
plant root system injury, landscape damage and even environmental
pollution caused by culture medium drop.