Method for overhead strawberry seedling culture by using biogas residues, biogas liquid and shiitake mushroom residues

The invention discloses a method for overhead strawberry seedling culture by using biogas residues, biogas liquid and shiitake mushroom residues. The method comprises the steps that after being dried,the shiitake mushroom residues are fermented and compounded with the decayed biogas residues and biogas liquid, and a compound substrate is prepared. The compound substrate can very well meet actualdemands for growth and development of strawberries; besides, the compound substrate contains physiological active substances so that the growth of the strawberries can be scientifically regulated, andthe compound substrate has a good prevention and control effect on plant diseases and insect pests. The shiitake mushroom residues are rich in organic matter, after the shiitake mushroom residues arecompounded with the biogas residues, the biogas liquid and grass carbon, the air-permeable and nutritive substrate is prepared, the breeding requirements of strawberry stock plants are met, and photosynthesis of cotyledons is promoted. According to the method, while water and fertilizers are reasonably applied, boron, molybdenum, iron and other microelements are compounded into a compound leaf micro-element fertilizer, the biomass of the overground parts and the underground parts of the strawberry stock plants and seedlings can be significantly improved, and the leaf growth is promoted. The strawberry seedlings are three-dimensionally overhead cultured, the seedling quality is good, after field planting, the surviving rate is high, fewer seedlings are complementarily planted, and the costis saved.