The modern science knows well that the most essential factors of mineral food of animals are two major elements - calcium and phosphorus. The voluminous forages and numerous natural fossil minerals widespread in many regions of the country can be calcium sources for animals.
The solution of the problem of providing animals with phosphorus was and remains the most complex problem. It is connected with the fact that there are no fossil sources of this macrocell. In voluminous sterns of phosphorus it is not enough. For example, in hay its concentration is lower, than calcium by 5-9 times. In the concentrated phosphorus sterns relatively there is a lot of. But its assimilation from these forages does not exceed 12-15 from initial quantity, as causes its enormous deficiency. As a rule more than 90% of phosphorus of concentrates are connected in specific organic salts-fitaty. There are no own enzymes destroying these salts in an organism of animals and birds. And only at adults ruminant microorganisms of a hem are capable to release phosphorus from phytin connections, making it rather available for animals.
Modern intensive pig-breeding and poultry farming is not imaginable without use of synthetic phosphoric additives any more. In world practice widely apply mono - di - trikaltsiyfosfat.