Advances In Classification And Application Of Animal Feed Enzymes

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Advances In Classification And Application Of Animal Feed Enzymes

At present, enzymes are widely used in the market, involving pulp, paper, leather, detergent, textile, medicine, chemical industry, food and other production industries. In the current development of animal husbandry, enzymes also play an important role. Especially in animal nutrition, adding animal feed enzymes has many functions. Animal feed enzymes can make the nutrient components in feed better absorbed and improve the utilization rate of feed; feed enzymes can degrade some non-absorbable components in feed, or degrade some non-valuable or even toxic components; improve the gastrointestinal function of livestock and poultry, and effectively inhibit pathogenic bacteria in intestinal tract. Reproduction can improve immunity and reduce morbidity and mortality. Long-term use of enzymes can alleviate the odor of livestock and poultry manure and ammonia in livestock houses, and improve the breeding environment. For example, protease can reduce the non-protein nitrogen content in feed and reduce the urea content discharged into the environment.
1. Classification of animal feed enzymes
At present, many kinds of enzymes have been found, of which more than 20 are used in feed. Animal feed enzymes are divided into endogenous enzymes and exogenous enzymes. Endogenous enzymes are mainly used to supplement the deficiencies of animal endogenous enzymes, including protease, amylase, glucoamylase and lipase. The main function of exogenous enzymes is to destroy plant cell walls, release nutrients in cells, and eliminate anti-nutrient factors in feed to promote digestion and absorption of animals. Exogenous enzymes mainly include phytase and non-starch polysaccharide enzymes. Non-starch polysaccharide enzymes include xylanase, glucanase, mannanase, pectinase and cellulase.
2. Advances in the Application of Animal Feed Enzymes
Phytic acid and non-starch polysaccharide are the two main anti-nutritional factors in plant protein sources. The existence of these two anti-nutritional factors will reduce the digestibility of nutrients and affect animal growth. Therefore, it is very important to add phytase and non-starch polysaccharide enzymes to feed. Protein is the main ingredient of feed. Animals usually do not digest protein thoroughly in human feed, and eventually discharged with feces. Adding protease to feed can improve the digestive utilization of protein and reduce production costs.

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