The invention relates to the technical field of
agricultural science, and particularly discloses preparation and application of a composite polypeptide growth-promoting supplement liquid for
livestock and poultry. The composition comprises a plurality of active polypeptides such as recombinant human epidermal growth factors,
trefoil peptides,
insulin-like growth factors and the like, vitamins A, E, C and B, and is supplemented with recombinant collagen peptides, marine source acidic polysaccharides and a composite carrier consisting of hydroxypropyl-beta-
cyclodextrin,
trehalose and
sodium hyaluronate. The preparation method comprises the following steps: respectively carrying out independent shunt pretreatment on the polypeptide component and the
vitamin component, integrating through a programmed gradient compounding process and a dynamic
pH regulation process, and finally carrying out fine
filtration and sterile filling to obtain the product. The composition can be used for preparing a feed or drinking water additive for promoting the growth of
livestock and poultry, maintaining intestinal health and improving the feed
utilization rate, and has the advantages of stable components and good activity maintaining effect; according to the preparation method, the long-acting stability of the composite
system is realized by optimizing the process sequence and conditions.