ОБМЕН КАЛЬЦИЯ И ФОСФОРА В ОРГАНИЗМЕ ЛАКТИРУЮЩИХ КОРОВ СИММЕНТАЛЬСКОЙ ПОРОДЫ ПРИ СКАРМЛИВАНИИ КОРМОВЫХ ДОБАВОК ИЗ МЕСТНЫХ РЕСУРСОВ В УСЛОВИЯХ ЯКУТИИ

Abstract

The article presents the results of studies on the digestibility of nutrients and the metabolism of calcium and phosphorus in dairy cows. The balance of minerals in the body of cows when feeding feed additives from local resources indicates that the content of macro- and microelements in the diets of animals during the period of the experiments basically corresponded to the norms. The use of protein-vitamin-mineral supplements from local components (barley "Tammi", oats "Pokrovsky", dry brewer's grains, zeolite-hongurin, probiotic preparation "Khongurinobakt", as well as factory components: mineral premix "Megamix", synthetic amino acid – lysine and table salt) balanced the diet for missing nutrients and improved the palatability of the main feed. In the studied diets, 1 ECU had digestible protein – 107.1 g, 125 MJ of metabolic energy and 14.81 kg of dry matter. The ECE concentration in 1 kg of dry matter was 0.66. Feeding by cows of the 2nd experimental group of the recipe for feed additives No. 2 contributed to better digestibility and use of nutrients in the rations. The digestibility of nutrients of cows was higher in cows of the 2nd experimental group, while a high level of digestibility in comparison with the control and 1st experimental groups was established in relation to dry matter by 1.0 and 1.5%, organic matter by 2.8 and 2.0%, crude protein by 3.3 and 2.0%, crude fat by 2.3 and 1.5%, crude fiber by 3.0 and 2.0% and BEV by 0.5 and 1,3%. As a result of the study of the balance of minerals in the body of cows, the positive effect of using feed additives from local resources in the diets of cows has been proven. Consequently, the improvement in the metabolism of calcium and phosphorus in the diet is explained by the fact that protein-vitamin-mineral feed additives had a stimulating effect on the state of metabolic processes and the health of animals in general.