The invention discloses a preparation method capable of realizing
aspergillus niger
spore multiplication through carrier adsorption and producing xerospore
powder of
aspergillus niger. The preparation method comprises steps as follows: corn and
bran are mixed in the ratio of 7:3, the corn and
bran mixture and water are mixed in the ratio of the total weight of solids to the volume of water being 1:5, then, high-temperature-resistant
amylase is added, the mixture is boiled at 100 DEG C for 30 min and filtered, and a culture solution of
aspergillus niger spores is obtained. Crushed corncobs in the volume of 1 cm<3> is mixed with the culture solution of
aspergillus niger in the weight-to-volume ratio being 1:3.5, and the mixture is put in a
solid-state
fermentation tank, sterilized at 121 DEG C for 20 min, cooled to 37 DEG C and inoculated with 104-105 CFU / mL
aspergillus niger spores on the basis of the volume of the culture solution of
aspergillus niger. The
solid-state
fermentation tank is kept at the temperature of 37 DEG C, the mixture is cultured for 120 h, a compound protectant is added after the aspergillus niger spores are diluted, the volume ratio of a
spore suspension to the compound protectant is 2:3, the balancing time lasts for 40 min,
vacuum drying is performed, and xerospore
powder of aspergillus niger is collected. By means of the preparation method, the
survival rate of aspergillus niger
spore powder is increased, and the storage period of strains is prolonged. Meanwhile, a compound dryer adding method consumes little energy, and the preparation method adopts a simple process and is low in cost and more suitable for large-scale production.