Application of feed probiotics in animal nutrition

Abstract: Probiotics have been widely used in livestock production as a green feed additive. Because it has the functions of maintaining the balance of intestinal flora, regulating the body's immune function, improving the body's metabolism and purifying the intestinal environment, and has no toxic side effects, no drug residues, and no drug resistance during use, it has become An ideal substitute for antibiotics. The article reviews the concept, types, functions of probiotics, their application in animal nutrition, and the considerations for using probiotics. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

Key words : probiotics; animal nutrition; application ANG China Feed Industry Information Network - based on feed, service animal husbandry

At present, the diseases caused by bacteria in animal husbandry are mainly treated by antibiotics, but the unreasonable use of antibiotics causes most bacteria to produce different degrees of resistance to them, which brings hidden dangers to disease treatment. Practice has proved that probiotics are safe, non-toxic, non-accumulative, non-resistant, environmentally friendly, and are micro-ecological preparations that can directly feed animals and promote the balance of intestinal flora in animals. The use of probiotics as a feed additive instead of antibiotics is expected to solve the problem of antibiotic residues and animal resistance, which is invaluable to the development of animal husbandry. This article elaborates on the concept, type, role of probiotics, application in animal nutrition, and considerations for the use of probiotics, in order to provide reference for the wide application of probiotics in animal husbandry. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1. Types of probiotics ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1.1 Probiotics ANG China Feed Industry Information Network - based on feed, serving animal husbandry

Probiotics are active microorganisms or cultures that can be directly fed to animals and that are used to prevent disease, promote animal growth, and improve feed utilization by regulating the intestinal micro-ecological balance of the animal, also known as microecological preparations or feed microbial additives. Its function is safe and non-toxic, no accumulation of residues in animal products, no drug resistance, no environmental pollution, etc. It is an ideal green additive to reduce or replace antibiotics. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1.2 Types of probiotics ANG China Feed Industry Information Network - based on feed, serving livestock

The probiotic classification methods currently used more frequently are classified according to the type of strain. There are 12 kinds of feed microbial additives allowed by the Ministry of Agriculture of China, which are divided into lactic acid bacteria, Bacillus and yeast. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1.2.1 Lactic acid bacteria preparation ANG China feed industry information network - based on feed, service animal husbandry

Lactic acid bacteria are Gram-positive bacteria that can break down sugars to produce lactic acid, anaerobic or facultative anaerobic. Not resistant to high temperature, 70%~80% loss after 5 minutes of treatment at 80 °C. However, it can grow in the environment of pH 3.0~4.5, and has certain tolerance to the acidic environment in the stomach. These preparations are the earliest, most extensive and widely used. Currently used are Lactobacillus, Streptococcus faecalis, Bifidobacterium, and the like. Lactobacillus preparation is a spore culture that secretes lactic acid and short-chain fatty acids, which can increase protein nitrogen in the blood, improve protein metabolism and promote feed digestion. It can be used for both feed and disease treatment. And cattle. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1.2.2 Fungi and Yeast Preparations ANG China Feed Industry Information Network - Based on Feed, Serving Livestock

The fungi are mainly filamentous bacteria. The commonly used preparations are cultures of Aspergillus oryzae and Saccharomyces cerevisiae, and are preparations including fungi and cultures thereof, and are mostly used for ruminants. Yeast cells are rich in protein, nucleic acid, vitamins and various enzymes. They have the functions of enhancing animal immunity, increasing feed palatability, enhancing digestion and absorption, and improving the utilization of phosphorus by animals. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

1.2.3 Bacillus preparation ANG China feed industry information network - based on feed, service animal husbandry

Bacillus is a non-pathogenic bacteria in aerobic bacteria. Under certain conditions, it produces spores, acid and alkali resistance, salt tolerance, high temperature resistance and extrusion resistance. It has high stability in the intestinal acidic environment and can make intestinal pH and A decrease in ammonia concentration produces a more active protease and amylase. Currently, the strains used are Bacillus subtilis, Bacillus licheniformis, Bacillus cereus, Bacillus natto, and the like. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

2, the role of probiotics ANG China feed industry information network - based on feed, service animal husbandry

2.1 Enhance animal immunity ANG China Feed Industry Information Network - based on feed, service animal husbandry

Probiotics have the same or similar antigenic substances as pathogenic bacteria, stimulating the body's immunity to pathogenic bacteria. At the same time, the study also found that probiotics can promote the development of immune organs in animals (P<0.05). Zhang Chunyang and other probiotics prepared by proteases were used to prepare probiotics for feeding broilers. It was found that the growth and development of broiler immune organs were significantly promoted, and the spleen, thymus and bursa index were increased by 18.47%, 41.46% and 6.42%, respectively. 1 ]. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

2.2 Maintain animal intestinal micro-ecological balance ANG China Feed Industry Information Network - based on feed, service animal husbandry

Probiotics can inhibit the growth of pathogenic and spoilage bacteria in animals, improve the micro-ecological environment of animals, and improve the immunity of animal organisms. Tests have shown that lactic acid bacteria and bifidobacteria produce acetic acid and lactic acid in the intestine to lower the intestinal pH, thereby inhibiting the growth of Escherichia coli and Clostridium, and the inhibition rate is 80%. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

2.3 Promote the growth of livestock and poultry, improve feed utilization ANG China Feed Industry Information Network - based on feed, service animal husbandry

Probiotics produce organic acids (lactic acid) in the digestive tract. Its acidification can improve nutrient utilization of diets, promote animal growth, prevent diarrhea, and produce carbohydrate-degrading enzymes such as amylase, protease, and polysaccharide enzymes to eliminate anti-nutritional factors. It promotes digestion and absorption of animals, improves feed utilization, synthesizes vitamins, sequesters mineral elements, and provides essential nutrient supplements for animals. ANG China Feed Industry Information Network - based on feed, serving animal husbandry

2.4 Purification of animal intestinal micro-ecological environment ANG China Feed Industry Information Network - based on feed, serving animal husbandry

Animals and many pathogenic bacteria produce toxic substances (toxic amines, ammonia, bacterial toxins, ammonia free radicals, etc.). There are nitrifying bacteria in probiotics, which can prevent the synthesis of toxic amines and ammonia, and purify the intestinal micro-ecological environment of animals.

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