Enzymes in Poultry Feed
Enzymes, by definition, are chemicals or catalysts released by cells to speed up specific chemical reactions. This definition accounts for enzymes released in the digestive tract to aid in the digestion of food. Today, these same enzymes can be effectively manufactured and added to animal feeds. Three classes of enzymes (phytases, carbohydrases, and proteases) are typically considered for use in poultry feeds. This article will briefly discuss the purpose of each class and their applicability to poultry feeds.
They have been used in the poultry nutrition for at least 3 dedicate. Traditional applications have included improving the digestibility and bird performance of ingredients such as barley, wheat and other cereals. The anti-nutritive factors that are associated with these and other feedstuffs has expanded, the applications for enzymes have also increased. Non-starch polysaccharides may increase the viscosity of the digesta and decrease nutrient availability and avian performance. These are also linked to other compounds such as peptides and proteins and make the use of a purified enzyme designed to degrade non-starch polysaccharides less effective than lower rates of non-starch polysaccharides degrading enzyme combined with other enzymes such as proteases. Other anti-nutritional factors such as phytate can also adversely affect performance and supplementation with phytase enzyme has been shown to improve calcium and phosphorus utilization and protein. The lower costs of commercial enzyme preparations,...
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