The invention discloses a preparation technology and application of high-
protein-content high-nucleic-acid-content
yeast hydrolyate. The preparation technology of the high-
protein-content high-nucleic-acid-content
yeast hydrolyate comprises the following steps of performing high-density liquid
fermentation on
yeast strains, performing washing, performing ultrasonic treatment, performing autolysis, performing enzymolysis, performing concentration, performing
spray drying and the like, so that the high-
protein-content high-nucleic-acid-content yeast hydrolyate is obtained, wherein the crude
protein content is greater than or equal to 50wt%, the
nucleic acid content is greater than or equal to 10wt%, the yeast
cell wall
polysaccharide is greater than or equal to 15wt%, the ash content is smaller than or equal to 6wt%, and the purity is high. A
feed additive for
lactation sows is prepared in a manner that the prepared high-protein-content high-nucleic-acid-content yeast hydrolyate,
glutathione and
chitosan oligosaccharide and a carrier are matched and reasonably compounded, and a certain amount of the
feed additive is added to a ration, so that the
milk secretion level of the
lactation sows can be increased, and the repopulation capacity of the
lactation sows can be improved.