The influence of new feed additives on the biochemical indicators of the blood of the Simmental breed in the conditions of Yakutia

Purpose: to study the influence of new feed additives on the biochemical indicators of blood and the reproductive ability of the Simmental breed cows in Yakutia.Materials and methods. Studies were conducted on the basis of Khorobut LLC Megino-Kangalassky District of the Republic of Sakha (Yakutia) in the Earel dairy reproduct. In the summer, animals grazed on natural pastures in an agricultural economy, and in winter they were kept in a dairy reproduction on a leash. The duration of scientific and economic experience was 238 days. Animals were divided into 3 groups of 10 goals in each, given their age and live weight. The content of animals in groups was the same. Feeding was carried out twice a day. In the stall period, animals of all groups received a balanced diet in accordance with the detailed feeding system. All groups were contained in the same conditions, with the same diet. Bolus for dry cows was introduced using a special applicator. The diets for experimental groups were the same in basic nutrients and developed by A.P. Kalashnikov and colleagues. To assess the state of the animal body during the experience, a study of blood biochemistry was carried out, including the content of uniform elements and micro-macroelements.Results. The analysis of the data did not reveal statistically significant changes in the biochemical indicators of the blood during experiments. All blood parameters in all groups of animals remained within the limits of physiological norms both at the beginning and at the end of the experiment, without significant differences between groups. The results of the analysis of samples showed an increase in the level of total protein in the studied animals during experience. Although there were no statistically significant differences between the groups, there was only an increase in protein levels in the I-reserve group, while in the control and second groups this indicator remained stable throughout the experiment. Thus, the use of new feed additives for dry cows will adjust the metabolism and prevent productive disorders in their body.