Risks associated with quality and rating of mineral raw materials and their prevention in poultry

Abstract

In connection with the growth of the genetic potential of productivity and the extension of the use of chickens in egg poultry farming, as well as with the high growth rates of broilers with a reduction in the duration of their breeding, the problem of violations in the mineral nutrition of poultry has become aggravated. This is expressed in weak bones in chickens, curvature of the breastbone in layers, poor plumage, decreased hatching due to poor ossification of the beak, bone fractures during catching and transportation of poultry, decreased fertilization of eggs, deterioration of the shell quality, etc. This is facilitated by the use of cheaper sources of macro- and microelements in the formulation of feed and premixes, as well as often unreasonably overestimated correction of the level of calcium, phosphorus, vitamins and microelements due to nutrient matrices for enzyme preparations, premixes and other additives.

The article draws attention to the need to include calcium sources with a particle size of 0.5-0.8 mm (40-50%) and a particle size of 2-5 mm (50-60%) in mixed feed for chickens, so that during the formation egg shells to ensure an even flow of calcium into the uterus. A method for determining the solubility of calcium sources is presented, which will allow you to control this indicator and correctly select mineral raw materials. It is noted that often the reason for the deterioration of mineral metabolism is the incorrect regulation of phosphorus due to phytases with overestimated nutrient matrices. Provides normative data on the content of calcium and phosphorus in bones and their actual values. Recommendations for the prevention of mineral disorders in poultry are given.