The core advantages of yeast culture in animal feeding

      Yeast culture, as a natural functional feed additive, exhibits multidimensional value in animal husbandry. Its core advantages can be systematically analyzed from the aspects of nutrient supply, intestinal health, immune enhancement, and growth performance optimization

1、 Full spectrum nutrition empowers growth and development

(1) Efficient supply of high-quality protein and essential amino acids

      Yeast culture contains 20% -50% high cost protein, with an amino acid composition that meets the nutritional needs of animals, especially rich in lysine (the first limiting amino acid of cereal feed) and methionine, which can directly compensate for the amino acid deficiency of conventional feed. For example, adding it to piglet feed can increase the utilization rate of crude protein in the diet by 12% -15%, significantly improving the muscle synthesis efficiency of young livestock.
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(2) Natural vitamin complex enhances metabolism

      Rich in B vitamins (such as thiamine, riboflavin, cobalamin) and vitamins D, E, etc., with vitamin B12 content reaching 0.2-0.5mg/kg, it is an important supplement for rumen microbial synthesis in ruminants. Research has shown that adding yeast culture to the diet of laying hens can increase the vitamin B2 content in egg yolks by 20%, significantly improving the nutritional quality of eggs.
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2、 Regulation mechanism of intestinal microbiota

(1) Dual factor improves intestinal barrier

      The cell wall components β - glucan (content ≥ 8%) and mannan (≥ 5%) exert a "molecular sponge" effect: mannan adsorbs the pili receptors of pathogenic bacteria such as Escherichia coli F4 (K88) and Salmonella through specific sugar chain structures, reducing their colonization in intestinal mucosa; β - glucan stimulates the secretion of mucin by intestinal goblet cells, increasing the thickness of the intestinal mucus layer by 30% and forming a physical barrier.
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(2) Postbiotics regulate microbial balance

      The organic acids (lactic acid, acetic acid content ≥ 1.5%) in the culture reduce the intestinal pH to 5.0-5.5 and inhibit the proliferation of Gram negative bacteria; Simultaneously released nucleotide substances (such as ATP and cAMP) act as signaling molecules, promoting the proliferation of beneficial bacteria such as bifidobacteria and lactobacilli, increasing the abundance of beneficial bacteria in the intestine by 40% -60%, and significantly improving the diarrhea rate of weaned piglets (reducing by 25% -30%).
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3、 Immune enhancement and disease prevention and control

(1) Dual pathways of immune activation

      Activation of innate immunity through pattern recognition receptors (such as TLR-2/TLR-4): β - glucan binds to CR3 receptors on the surface of macrophages, increasing the secretion of cytokines such as TNF - α and IL-6 by 50% -80% and enhancing phagocytic activity; At the same time, the polysaccharide antigen complex stimulates acquired immunity, increasing serum IgG levels by 15% -20% and enhancing vaccine response.
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(2) Potential for antibiotic substitution

      Adding 0.5% -1% yeast culture to the diet of weaned piglets can reduce antibiotic use by 30%, and the incidence of diarrhea and growth performance are better than those of the traditional antibiotic group. The mechanism lies in regulating intestinal sIgA secretion (increasing by 20% -25%), forming a mucosal immune barrier, and reducing the risk of pathogen invasion.
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4、 Empirical data on the improvement of production performance

(1) Efficiency performance in poultry farming

      Egg laying hens: egg production rate increased by 5% -10%, feed to egg ratio decreased by 8% -12%, eggshell strength increased by 15% (due to increased calcium absorption rate), egg yolk lutein content increased by 30% (improving egg color)

      Broiler: At 42 days of age, weight gain of 5% -8%, chest muscle rate increase of 3% -5%, and survival rate increase of 2% -3% (especially in high-density breeding environments)

(2) Key advantages of livestock farming

      Piglets: Weaned weight increases by 10% -15%, diarrhea rate decreases by 25%, and survival rate increases by 5%; The relief effect on early weaning stress is significant, maintaining a ratio of intestinal villus height/crypt depth (V/C) of 3:1 or above (the conventional group is 2.5:1)
Ruminant animals: Milk production of cows increases by 3% -5%, and milk fat percentage increases by 0.3-0.5 percentage points; The daily weight gain of beef cattle increased by 8% -10%, and the feed conversion rate increased by 10% -12%, especially in roughage based diets where the effect was more significant.

5、 The strategic value of green farming

      As a natural fermentation product, yeast culture conforms to the current policy guidance of "reducing resistance and replacing resistance": in the breeding system where antibiotics are banned in the EU, the addition of yeast culture can control the incidence rate of animals at the same level as the antibiotic group (≤ 5%). At the same time, the carbon emissions from its production process are only one-third of those of synthetic additives, which is in line with the global trend of sustainable aquaculture.
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Application suggestions

      Stage adaptation: The recommended dosage for young animals (weaning and brooding stages) is 1% -2%, and for adult animals it is 0.5% -1%.

      Synergistic effect: When used in combination with probiotics (such as Bacillus subtilis) and enzyme preparations (such as xylanase and amylase), it can increase feed utilization by 15% -20%

      Quality control: Select standardized products containing ≥ 10% cell wall polysaccharides and a viable bacterial count of ≤ 10 ^ 6CFU/g (to avoid interference with intestinal homeostasis by viable bacteria).

      Yeast culture has established a new paradigm for animal health breeding through a three-dimensional mechanism of "nutrient supply intestinal regulation immune activation". With the development of large-scale and refined breeding, its comprehensive value in improving production efficiency, ensuring the safety of livestock products, and promoting environmental friendliness is becoming an important support for the transformation and upgrading of modern animal husbandry. ​