The anti-nutritional effect of phytates - the extraphosphorus effect of phytase (review)

Abstract

An analytical review was conducted on the availability of phosphorus from phytates, which increase the inclusion of phytase in the feed, while not only phytic acid is broken down, but also as a result of a decrease in concentration reduces its anti-nutritional effect.Phosphorus from plant feeds is not fully available to animals, as it is part of phytates, the cleavage of which in the gastrointestinal tract (gastrointestinal tract) of animals is limited. Phytates, getting into the acidic environment of the stomach, ionize and react with positively charged minerals, proteins, amino acids, creating compounds inaccessible for further digestion. The inclusion of phytase in compound feed is accompanied by an extra phosphoric effect, which is expressed in an increase in the availability of amino acids and energy. The decision on the feasibility of including phytase in feed is made on the basis of production tests of the proposed drugs.The studies carried out by the authors of invitro confirm the assumption that phytates enter into chemical interactions with peptides, as well as amino acids formed in the processes of protein digestion, turning them into compounds inaccessible to absorption. The proposed explanation does not affect the results of the balance experiment, but allows us to develop the study of the mechanism in terms of the interaction of digested amino acids with phytates. Based on this, another conclusion can be seen: the destruction of phytates should occur in the body before the digestion and dissolution of protein. In birds, this place is the goiter and stomachs, in pigs - the stomach. The hydrolysis of newly formed phytates (FC-amino acid) requires phytases that are active in the environment of the small intestine at pH 6 -7. As a result, the bound amino acids will be re-released and available for absorption. The development of new phytase preparations, taking into account the proposed explanation, will make it possible to create more effective feed preparations.