The invention relates to a
charcoal based
plant cultivation substrate and a preparation method thereof, and belongs to the technical field of soilless culture. The invention adopts the specific scheme that: after being dried,
biomass material is pyrolyzed to form
charcoal particles under an anoxic and heating condition,
potassium dihydrogen
phosphate is used for neutralizing the
alkalinity of the
charcoal particles and filtering and
drying are performed, and after a certain amount of
inorganic fertilizer is added, the charcoal particles are fully mixed with inorganic filling material, organic filling material and
organic fertilizer, namely the charcoal based
plant cultivation substrate is obtained. The invention has the advantages that the
physical chemical property is excellent, the nutrients are complete, the
fertilizer efficiency is lasting, the
moisture adjusting capability is strong, the cost is low, the ecological benefits are high, the suitability is strong, the application range is wide, and the charcoal based
plant cultivation substrate is suitable for cultivation of various plants.