This invention relates to an enzymatically
hydrolyzed protein composition as a substitute for fishmeal and its preparation method, belonging to the field of feed technology. The enzymatically
hydrolyzed protein composition comprises the following raw materials: animal
protease hydrolysate, brewer's
yeast extract, bile acids,
sodium butyrate,
sodium selenite, and fructooligosaccharides. This application selects cricket
powder and defatted
mealworm powder as
animal protein sources. Simultaneously,
chitinase,
alkaline protease, and
neutral protease are used sequentially to enzymatically hydrolyze the cricket and
mealworm complex. The cricket
powder and defatted
mealworm powder after
enzymatic hydrolysis effectively eliminate anti-nutritional factors in the original
insect feed, and have
high protein utilization, effectively releasing nutrients and improving nutritional value. Based on this, brewer's
yeast extract and bile acids are added for compounding, which synergistically promotes
weight gain and growth in aquatic animals. Furthermore, this application uses
sodium butyrate, sodium selenite, and fructooligosaccharides in combination, which effectively gives the prepared composition significant
antioxidant effects from different dimensions.