Preparation method of astragalus mongholicus solid fermentation product and application of astragalus mongholicus solid fermentation product in preparation of feed additive for regulating growth and development of weaned donkey foals

The invention discloses a preparation method of a radix astragali solid fermentation product and application of the radix astragali solid fermentation product in preparation of a feed additive for regulating growth and development of weaned donkey foals, and relates to the technical field of preparation of fermented radix astragali and donkey feed additives. The content of active compounds is increased, the oxidation resistance is enhanced, and the utilization of radix astragali resources is facilitated. In addition, radix astragali obtained through solid state fermentation of pediococcus pentosaceus and lactobacillus plantarum is added into the feed, the growth performance and the disease resistance are improved by improving the nutrient substance digestibility, the serum oxidation resistance and the immune index, disease prevention of farms is facilitated, and the production benefits are improved. Meanwhile, the structure and the function of the intestinal microflora can be optimized, so that the intestinal