The invention relates to fermented
soybean meal and a preparation method thereof. The preparation method of the fermented
soybean meal comprises the following steps: crushing peeled
soybean meal and performing sieving with an 80-mesh
sieve, carrying out first-step enzymolysis by using alpha-galactosidase and glucoamylase, then carrying out second-step enzymolysis by using
papain, carrying out
enzyme deactivation, inoculating a composite strain of
saccharomycetes, bacillus and
lactic acid bacteria, carrying out aerobic
fermentation, then carrying out anaerobic
fermentation, and carrying out
spray drying on the finished product to retain active ingredients to the maximum extent. The prepared enzymatically hydrolyzed and fermented soybean
meal has specific fragrance of
fermentation, the
protein content is about 55%, and the acid-soluble
protein content is greater than 50%. Antinutritional factors such as antigens are basically removed, and the components are stable. The enzymatically hydrolyzed and fermented soybean
meal has the characteristics of strong hydrophilicity, high
water retention rate, high
palatability, obvious phagostimulant to aquatic animals and the like. The fermentedsoybean
meal is rich in functional small peptides, probiotics and metabolites of probiotics, is beneficial to intestinal
nutrition balance of cultured animals, can be used to solve the problem of nutritional
diarrhea of animals, and is suitable for feed for piglets, poultry, pets, aquatic products and the like, wherein the suggested use ratio is 2-5%.