The effectiveness of microbial phytase
The effectiveness of microbial phytase is that it frees up in feed ingredients phosphorus bound in phytate. Effect of microbial phytase in proportion to the total amount of phytic phosphorus: the more phytates, which contains phosphorus, the more phosphorus is released under the influence of microbial phytase. Phosphorus availability is increased by adding the feed phytase of microbial origin. Therefore, the feed components are dependent on the amount of phosphorus that is in phytate.
According to the table, most of the microbial phytase contained in grains and embryos of corn grains. Diets based on grains, enhance the absorption of phosphorus contained in fitatnyh complexes than rations containing dry fermented grains with solubles (DDGS), or high-protein dry fermented grains (HP DDG), which contribute to the very small (low) absorption of phytic phosphorus.
Microbial phytase activity is different for each component
The impact of microbial phytase on the different types of food is different, so you can not accurately make a diet for pigs, taking into account the overall mechanism of action of microbial phytase. However, if you know that the digestion of phytate phosphorus promotes microbial phytase addition, we can determine the exact amount by which to increase the energy value of food by adding microbial phytase.
The consequence is that all components must have some indicators of digestibility of phosphorus associated with the availability of phosphorus with and without microbial phytase. Using figures from the table number 1, indicators of digestibility of phosphorus in cereals should be introduced in the development of programs and form 40.9% (without phytase) and 67.5% (with phytase). If different levels of microbial phytase, the digestibility of phosphorus derived from each level of phytase must be specified. This approach will lead to the most accurate way to determine the value of phytase in the diet of pigs.