Standard for beer yeast feed grade

      Beer yeast feed grade usually refers to beer yeast products that meet relevant standards and can be used for animal feed production. The following introduces the relevant standards, characteristics, applications, and other aspects:

Relevant standards

      NY/T 3970-2021 standard: This is a specialized standard for beer yeast powder as a feed ingredient, which specifies a moisture content of ≤ 9.0%, crude protein content of ≥ 40.0%, crude fiber content of ≤ 1.5%, and crude ash content of ≤ 10.0%. At the same time, it is required to observe only beer yeast cells and no other impurities under a 400x microscope, and to detect the presence of starch substances through iodine reaction.

      GB 13078 "Hygienic Standards for Feed": It is a general hygiene standard for the feed industry, and beer yeast feed also needs to comply with this standard. The content covers the limit requirements for harmful substances and microorganisms in feed, such as heavy metal content, fungal toxin limit, total bacterial count, Salmonella and other pathogenic bacteria.

Characteristics of feed grade beer yeast

      Nutritious: Rich in various essential amino acids, B vitamins, nucleotide peptides, and yeast cell wall polysaccharides with special functions such as β - glucan and mannan, it is a high-quality single-cell protein source that can provide comprehensive nutritional support for animals and promote their growth and development.

      Good food attraction: It has a unique yeast aroma, which can enhance the palatability of feed, improve the feeding rate and feed utilization of livestock, poultry and aquatic animals, make animals more willing to feed, and thus improve breeding efficiency.

      Improving intestinal microbiota: Rich cell wall polysaccharides are beneficial for the proliferation of beneficial bacteria in the intestine, and nucleotides can accelerate the differentiation, growth, and repair of intestinal epithelial cells, helping to improve the animal intestinal microbiota, optimize intestinal function, and reduce the occurrence of intestinal diseases.

      Enhancing immunity: Contains immune regulatory factors such as nucleotides, mannans, β - glucans, etc., which can activate the body's immune system, enhance animal immunity, improve animal survival rate, and help animals better resist diseases and external environmental stress.

      Good stability: With stable thermal and chemical properties, it can withstand extreme processing conditions such as puffing, and is not easily spoiled or lost in activity during feed processing and storage, making it convenient for feed companies to process and use.

      Green and safe: No drug resistance, no residue, no toxic side effects, in line with the requirements of green farming, it is a green livestock and aquatic feed additive in the 21st century, which helps to reduce the use of antibiotics and chemical drugs, and reduce the risk of ecological imbalance in the breeding environment.

Application in different animal husbandry

      Pig farming: Adding 3% and 5% beer yeast to piglet feed can significantly increase their feed intake, lower their feed to meat ratio compared to the control group, and significantly improve their weight gain rate after weaning. Replacing plasma protein powder with beer yeast powder poses no biological safety risks such as animal homologous contamination. It can increase the growth rate of piglets, reduce the diarrhea rate of weaned piglets, and improve the survival rate of weaned piglets.

      Broiler farming: Adding 2% to 3% beer yeast to the diet of broiler chickens can increase palatability, promote growth, and prevent soft foot disease in broiler chickens. Adding 2% to 4% beer yeast to the diet can enhance the immune response of broiler chickens to Newcastle disease.

      Aquaculture: Adding an appropriate amount of beer yeast powder to the diet of aquatic animals can significantly improve the survival rate and weight gain rate of shrimp, fish, and other aquatic animals. It can also reduce the feed coefficient and lower the cost of aquaculture. If beer yeast powder is used to replace fish meal in grass carp diet, all indicators of the beer yeast group are higher than those of the fish meal group, and there is no significant difference in weight gain rate and feed coefficient