Полиферментные препараты в кормлении моногастричных животных

In animal feeding enzyme preparations are mainly used, which are not produced in the body of animals, although in chickens in the first weeks of life and piglets after weaning an insufficient amount of their own proteases and amylases is formed, so their inclusion in feed is also useful. By now highly active enzyme preparations with various specific activities have been created and are being produced. In feeds prepared using traditional raw materials up to 30% of nutrients are not available for digestion by enzymes secreted in the gastrointestinal tract. The inclusion of exogenous enzymes in the feed provides additional use of the indigestible fraction. It is impossible to achieve complete digestibility of feed, although in vitro exogenous enzymes digest almost 100% of the target substrates. The problem is due to the fact that natural feed does not contain pure substrates — they are associated with other substances that  limit the availability of enzymes to them. The properties of natural substrates, their concentration and availability even in the same raw material are variable, which excludes reliable prediction of the effectiveness of the action of feed enzymes. Partially these difficulties are overcomed by the use of polyenzyme drugs. It is necessary to further study the specificity of native substrates and factors that increase their availability for the action of enzymes.