Dynamics of fat and protein metabolism in cows depending on the pregnancy period

Abstract

An analysis of the data obtained from the study of some blood parameters of dairy cows, reflecting their lipid and protein metabolism, was carried out. It has been determined that as pregnancy progresses, there is a significant positive trend in the increase in the concentration of lipids in the blood of pregnant dairy cows. Thus, the concentration of triglycerides by the 8-9th month of pregnancy increases by a total of 24%, compared with the data obtained at the beginning of the study (2 months of pregnancy). The data did not go beyond the generally accepted reference values for cows. At the same time, the concentration of cholesterol synchronously increases several times (up to 4), which indicates a redistribution of the metabolic load in the body, it is worth noting that this usually indicates the activation of synthesizing processes in the liver, which is also visible, first of all, by an increase in the concentration total protein during periods of pregnancy. The concentration of total protein in the blood serum by 8-9 months increases by 16.2%, compared with the results obtained during pregnancy at 2 months. The data obtained indicate the activation of protein and lipid metabolism during pregnancy, which is important to take into account when organizing feeding and maintenance to prevent the development of a negative energy balance.