Preparation method and application of biomass charcoal-based conditioner

The invention discloses a preparation method and application of a biomass charcoal-based conditioner, and belongs to the technical field of saline-alkali soil improvement conditioner preparation. The preparation method comprises the following steps: uniformly mixing reed charcoal biomass charcoal, bacillus fermentation liquor and a bacteria-retaining agent to prepare a biomass charcoal-based bacterial agent; sequentially adding urea, monoammonium phosphate, potassium sulfate, potassium fulvate, magnesium sulfate, chicken manure organic fertilizer, rape seed cake and calcium bentonite into the biomass charcoal-based microbial inoculum according to the proportion, and uniformly stirring in a stirrer to obtain the biomass charcoal-based conditioner. Results show that the growth of kosteletzkya virginica in the sandy saline-alkali soil can be promoted by applying different doses of biomass charcoal-based conditioners; the biomass charcoal-based conditioning agents of 0.8 per mill, 1.2 per mill and 2.0 per mill ar