The study of the effect of chitosan succinate use on the hematological indicators of dairy cows is relevant. It has been established that there was a clear tendency to increase in the number of white blood cells by 10.12% in animals of group 3 (P < 0.1) on the 10th day of the experiment in cows receiving low-molecular-weight chitosan succinate, in the second group the increase in this indicator by 2.94% was unreliable. On the 20th day of the experiment, an intensive increase in the number of white blood cells was observed in animals of both experimental groups by 14.63–17.38% (P≤0.01), respectively, for the experimental groups of cows. On the 10th day on the background of the use of low-molecular-weight chitosan (group 3), a significant decrease in the number of red blood cells was found, compared with the background, by 8.34% (P≤0.05). On the 20th day, the decrease in the number of red blood cells was already significant in both experimental groups, and their level was 6.09±0.33...6.38±0.20·109/l (P≤0.05), respectively. On the 60th day of the study, this trend was maintained only in group 3, and the concentration of red blood cells was lower by 12.64 (P < 0.05) compared to the initial values. By the 60th day, there was an increase in the level of hemoglobin index up to 126.12±9.10 g/l.

Abstract. Poultry farming is one of the most intensive and dynamic branches of agricultural production, it is the vanguard industry not only in livestock, but in all agriculture. In terms of concentration of production on small land areas, mechanization, automation and computerization of almost all production processes, this industry has gone far ahead in comparison with other branches of the agro-industrial complex. This is the bottom of the most important and promising branches of agriculture, occupying a leading position in Russia and in most countries of the world. The poultry industry in Russia has significant prospects for the development of domestic production of poultry meat and eggs. The main purpose for which a person breeds poultry is to obtain highly nutritious and dietary food products: meat and eggs. This is complemented by down and feathers. In the Russian Federation, the optimal solution to the food problem and nutritious nutrition of the population is the development of poultry egg farming, since the population's demand for fresh eggs and products of its processing is quite high. Poultry breeding is of great importance. It is the breeding significance of each rooster that is very great. The purpose of the work is to study the directional rearing of brood roosters and their maintenance during the period of breeding. Since this directly affects the quality of hatching eggs and the resulting offspring. The novelty lies in the fact that comprehensive studies have been carried out on the influence of age bonitization on the breeding qualities of males in the Sverdlovsk region. Methods. The generally accepted zootechnical and statistical research methods were used. Results. The developed methods of increasing the reproductive abilities of males, in particular, their assessment and selection for general development, live weight, development of reproductive organs and secondary sexual characteristics, as well as for sexual activity and quality of sperm products, make it possible to improve the quality of the products obtained and the economic efficiency of production.

The Ural type of the domestic black-and-white breed is distinguished by high productivity indicators, good suitability for use in the conditions of industrial milk technology. To obtain modern dairy cattle, related breeds were used in the herds, a significant number of animals obtained as a result of closely related breeding were revealed. the study of the influence of the degree of inbreeding on the growth and development of repair young is relevant and has practical significance. It was found that the live weight of heifers in all accounting periods practically did not differ, that is, it can be said that the method of obtaining heifers using unrelated or related selection did not affect the dynamics of live weight during their cultivation. The average daily gains in live weight differed slightly by growth periods and by groups. So they were higher in the periods from the first to the first fruitful insemination and from 10 to 12 months, lower gains were noted in the period from the moment of fruitful insemination to 18 months of age. The highest milk yield for lactation was obtained from the first heifers with a remote degree of inbreeding.

Holstein black pied cattle with a high genetic potential of productivity are bred in the Sverdlovsk region. The study of the interrelation between the productive traits of modern domestic dairy black pied cattle of the Middle Urals zone with high thorough-bredness for the Holstein breed is relevant. The purpose of the work was to study the conjugation dynamics of productive traits by lactation depending on the line. According to the average milk yield indicators. There were no differences in MFF and MFP in milk from cows of different lines, yet the fluctuations in milk yield within the lines were significant. The highest indicators of the correlation coefficient are established between the qualitative indicators of milk, which means that an increase in one of the indicators invariably leads to an increase another. A positive low conjugacy was established between milk yield and MFP in milk, as well as milk yield and cows’ live weight for the first and second lactation in cows of both lines. In cows of the Vis Back Ideal 1013415 line, the conjugacy of productive traits for the third lactation turned into negative, except for milk yield and live weight. Thus, the linear affiliation of cows and their age (lactation) influence the interrelation of productive traits, which can be considered when further planning breeding work with the herd.