Antiviral animal feed additive

A preparation method of an antiviral animal feed additive, comprising the following steps:

• step 1, providing 300 g to 500 grams (g) of Artemisia argyi, 200 g to 300 g of Lactuca sativa, 200 g to 300 g of Allium tuberosum, 300 g to 400 g of Allium cepiforme, 200 g to 300 g of Litsea rubescens Leeomte, 50 g to 150 g of Glycyrrhiza uralensis, 50 g to 150 g of Allium sativum, 75 g to 150 g of Mentha canadensis, 100 g to 200 g of Allium mongolicum, 50 g to 150 g of Lonicera japonica, 80 g to 120 g of Sargassum, 20 g to 30 g of monazite, 25 g to 35 g of calcium carbonate, 10 g to 20 g of fructo-oligosaccharide (FOS), 8 g to 12 g of isomaltooligosaccharide (IMO), and 20 g to 40 g of organic selenium;
• step 2, drying the Lactuca sativa, the Allium tuberosum, the Litsea rubescens Leeomte, the Glycyrrhiza uralensis, the Allium mongolicum, and the Lonicera japonica individually to obtain dried materials, grinding the dried materials in a grinder to obtain grinded materials, decocting the grinded materials by using purified water to obtain decoction, and then filtering the decoction to obtain a slurry;
• soaking the Artemisia argyi and the Mentha canadensis into water for 1 hour (h) to obtain soaked materials, performing steam distillation on the soaked materials to obtain a distilled product, and then adding the distilled product into water to perform a time of extraction by reducing pressure to obtain an extracted product, filtering and concentrating the extracted product to a target relative density, thereby obtaining a medicinal liquid 1;
• and crushing the Allium sativum and the Allium cepiforme to obtain crushed materials, adding the crushed materials into water for 3 h in a hermetic environment to obtain an infused mixture, adding ethanol into the infused mixture until a concentration of the ethanol is 50%, thereafter performing an extraction by reducing pressure to obtain a product, filtering and concentrating the product to a target relative density, thereby obtaining a medicinal liquid 2;
• step 3, adding the medicinal liquid 1, the medicinal liquid 2, and the slurry into a material mixing tank and then stirring evenly to obtain a mixed liquid;
• step 4, adding the Sargassum into the mixed liquid obtained in the step 3, and heating the mixed liquid added with the Sargassum to obtain a heated product, taking out the heated product to filter and cool down to obtain a cooled mixed liquid;
• step 5, adding 20% of the weight of the FOS and 20% of the weight of the IMO into the cooled mixed liquid obtained in the step 4, and then stirring uniformly, and placing the cooled mixed liquid added with the FOS and the IMO into a fermentation tank for a first fermentation to obtain a first fermentation broth;
• taking out and filtering the first fermentation broth to obtain a filtered first fermentation broth, adding the remaining FOS and the remaining IMO into the filtered first fermentation broth, and then placing the filtered first fermentation broth added with the remaining FOS and the remaining IMO into the fermentation tank for a second fermentation to obtain a second fermentation broth;
• step 6, crushing the monazite and the calcium carbonate to obtain mixed powder;
• placing the mixed powder into a furnace with a temperature of 2,000-2,200 degrees Celsius (° C.) and then sintering for 75-105 minutes (min) to obtain sintered powder;
• cooling the sintered powder to obtain cooled powder, placing the cooled powder into a cloth bag with 800-1,200 meshes and then distilling the cooled powder with a steamer to obtain a distilled liquid;
• and
• step 7, distilling the second fermentation broth obtained in the step 5 until there is no distillate to obtain a distilled fermentation broth;
• mixing the distilled fermentation broth, the distilled liquid obtained in the step 6, and the organic selenium completely to obtain a mixed liquid;
• adding the mixed liquid into olive oil according to a volume ratio of the mixed liquid to the olive oil of 1:5-10, thereby obtaining the antiviral animal feed additive;
• wherein the organic selenium is in the form of one selected from the group consisting of selenium enriched yeast, kappa-selenocarrageenan, selenium enriched Capsella bursa-pastoris powder extract, selenium enriched Cardamine occulta powder extract, selenium enriched Brassica rapa powder extract, selenium enriched Brassica oleracea powder extract, and selenium enriched Fructus Hordei germinatus powder extract.