The invention relates to the technical field of
plant cultivation substrates, in particular to a high-heat-preservation substrate for
recovery of broken hill
vegetation in a
high elevation region. 45-50% by volume of sand
loam, 35-40% by volume of highland barley
straw, 3-6% by volume of
organic fertilizer, 0.01-0.03% by volume of pellet agent, 0.01-0.03% by volume of
polyvinyl acetate, 0.01-0.03%by volume of
sodium carboxymethylcellulose, 2-4% by volume of
humic acid, 2-4% by volume of liquid emulsified
asphalt and 0.03-0.10% by volume of
plant seeds are taken, the substrate thickness is 2-6cm, the highland barley
straw particle size is 2-4 cm, the
organic fertilizer is faeces of Tibetan-sheep and yaks, highland barley
straw and rape stalk with the particle size smaller than 4 cm, faeces and the stalk are mixed according to the volume ratio being 1:(1-3) and then subjected to composting
fermentation, the composting time is from October to April the following year, turning and ventilation are conducted semimonthly, film mulching is used for covering at night, the
fermentation temperature is maintained, and the seeds comprise one or multiple of
pennisetum centrasiaticum, orinus thoroldii (Stapf ex Hemsl.) bor, rrtemisia wellbyi Hemsl. et Pears. ex deasy,
oxytropis sericopetala, rhododendron nivale and
sabina chinensis. The substrate has the advantages of being high in heat preservation, capable of prolonging
plant growth time, resistant to
washout, good in water-retaining property and capable of increasing the broken hill coverage rate.