Peculiarities of nutrient metabolism in the body of a purebreed and mixed young cattle

Abstract

Relevance. With the organization of optimal conditions for keeping and full-fledged, balanced feeding, a more complete realization of the bioresource potential of meat productivity is possible. Interbreeding contributes to the production of crossbred young animals, which, due to enriched heredity, have the potential for intensive growth and achieving a high level of meat productivity.Methods. For the study, 3 groups of bulls of the following genotype were formed from newborn young animals: I — Kazakh white-headed, II — 1/2 Hereford x 1/2 Kazakh white-headed, III — 3/4 Kazakh white-headed x 1/4 Hereford.Results. It was established that due to a more significant manifestation of the effect of crossing, the crossbred bulls of the II group (1/2 Hereford x 1/2 Kazakh whitehead) were superior to the crossbred peers of the III group (3/4 Kazakh whitehead x 1/4 Hereford) in the consumption of all types of nutrients. It is suffice to say that this advantage in dry matter intake was 98.9 g (1.1%), organic matter — 87.9 g (1.1%), crude protein — 18.8 g (1.4%), crude fat — 3.8 g (1.3%), crude fiber — 28.2 g (1.4%), nitrogen-free extractives — 37.1 g (0.9%). The obtained experimental data indicate the influence of the genotype of young animals on the value of the coefficient of digestibility of nutrients in the diet. At the same time, crossbred bulls of groups II and III better than purebred peers of the Kazakh white-headed breed used the nutrients of the feed diet that entered the body. This is evidenced by the value of the coefficient of their digestibility. It was found that the maximum consumption of all types of energy was characterized by crossbred half-blooded (1/2 Hereford x 1/2 Kazakh white-headed) bulls of group II.