This invention provides a method and application for improving the intestinal health of broilers using
earthworm powder, belonging to the field of
animal nutrition and feed technology. This invention solves the problems of poor growth performance, impaired intestinal health, and
soybean meal substitution caused by nutritional deficiencies in
broiler mixed meal diets. It includes the following steps: (1) raising earthworms in a substrate formed by mixing fermented
chicken manure and Chinese
medicine residue at a
mass ratio of 2:3, and adding 2000 ppm
sodium citrate to the substrate, controlling the substrate
humidity at 50% to 55% and the temperature at 23 to 25°C; (2) preparing
earthworm powder by freeze-
drying the earthworms obtained in step (1) after disinfection; (3) replacing part of the
soybean meal with 5.0% to 5.5% of the
protein such as
earthworm powder in the
mixed meal broiler diet, and feeding the broilers. This invention significantly improves the growth performance,
feed conversion ratio, immune function, intestinal
digestive enzyme activity,
intestinal morphology and
barrier function of broilers, and optimizes the cecal microbiota, ultimately achieving efficient reduction and substitution of
soybean meal and healthy and efficient
broiler breeding.