Veterynarna biotehnologija – Veterinary biotechnology, 2018, 33, 66-70 [in Ukrainian]. https://doi.org/10.31073/vet_biotech33-08

KOREYBA L.V., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., DUDA Y.V., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Dniprovsky State Agrarian and Economic University

FEATURES OF PROTEIN EXCHANGE IN HIGH-PRODUCING COWS IN DRY PERIOD

Introduction. It is well known that the metabolism high-producing cows is the most intensive in the dry period. Biochemical monitoring of the herd allows timely detection of deviation of biochemical parameters in cows.

The goal of the work was to study the dynamics of protein metabolism in high-producing cows during a dry period.

Materials and methods. Biochemical study of blood plasma was carried out in Holstein cattle in 8-9 months pregnancy and in the first two months after parturition.

Results of research and discussion. The total protein of cows organism decreased during the last months pregnancy in the spring through the dry period from 87.25±1.20 to 81.60±1.20 g/l (p<0.05), including globulin fraction from 51.96±2.08 to 43.75±2.07 g/l (p<0.05). The activity of aspartate aminotransferase decreased by 8.5 months up to 150.26±13.59 nM/s×l (p<0.01), and then it tended to increase up to 187.19±9.21 nM / s×l (p<0.05). Such a change in the activity of these enzymes at the end of pregnancy is associated with an increase in the processes of self-renewal of proteins due to reamination, which can be more intensively used by fetus. Significant decrease in the γ-globulin fraction from the 8th to the 9th month occurred gradually from 28.53 g/l to 22.97 g/l (p<0.01).

Conclusions and prospects for further research. Significant decrease of α-, β- and γ- globulins content as well as total protein was established during the dry period in blood plasma. Control of these blood parameters are promising for the prognosis and correction of obstetric pathology. Further work will be focused on the use of indicators of blood protein metabolism of high-producing cows for prediction and correction of obstetric pathology during parturition.

Keywords: cows, dry period, blood plasma, protein metabolism.

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