▎ 摘　　要

NOVELTY - Bio-organic fertilizer comprises 50-60 pts. wt. modified biochar, 10-15 pts. wt. silylated silica, 10-15 pts. wt. vitamin B5, 20-25 pts. wt. original apple vinegar, 5-8 pts. wt. sandalwood oil, 5-10 pts. wt. dandelion extract, 15-20 pts. wt. egg shell powder, 20-30 pts. wt. dry corn steep powder, and 5-10 pts. wt. Aspergillus niger. The preparation of the modified biochar is as follows: (1) drying biological substrate, crushing, and carrying out pyrolysis treatment to obtain biochar, (2) mixing graphene oxide and urea, grinding thoroughly, and roasting to obtain nitrogen-doped graphene, and (3) mixing nitrogen-doped graphene with the biochar, calcining, adding absolute ethyl alcohol, and carrying out ultrasonic treatment to remove anhydrous ethanol, and drying to obtain modified biochar. USE - The bio-organic fertilizer is useful for promoting flower growth. ADVANTAGE - The modified biochar has larger specific surface area and stronger adsorption, effectively increases content of organic matter in the soil, improves aggregate structure of the soil, avoids burning seedlings and soil compaction, promotes flower growth, and increases survival rate. The method adds silylated silica and vitamin B5 synergistically to play the role of adsorption and water storage, activates immunity of flower plants, and promotes flowers growth by using original apple vinegar, sandalwood oil and dandelion sextract.