Influence of peripartum dietary energy supplementation on some blood biochemical parametars in dairy cows

The aim of this study was to determine the influence of an energy supplement on the basis of propylene glycol on the values of metabolic profile parameters in periparturient cows. Fifteen days before calving, 40 cows were selected and divided into two groups: control (n=20) and experimental (n=20). From day 15 before to day 30 after calving, the experimental group of cows received an energy supplement based on propyleneglycol added in food ("OSIMOL“, Veyx-Pharma GmbH, Germany). Blood samples were taken 15 days before and 10 days after calving. Concentrations of glucose and betahydroxybutyric acid (BHBA) were determined immediately after blood was taken. Concentrations of total protein, albumin, urea and total bilirubin were determined in the blood serum. There was no significant difference in the average values of the measured parameters between the control and the experimental group of cows. After parturition glycemia in cows of the control group was lower than physiologically acceptable (x=1.93±0.43 mmol/L), and glucose in cows of the experimental group was at the upper physiological limit (x=3.13±0.33 mmol/L) and signicantly higher (p<0.001) than in the control group. The concentration of BHBA in cows that received the energy supplement („OSIMOL“) was 0.40±0.12 mmol/L, while in the control group of cows it was significantly higher (p<0.001) and stood at 0.88 ±0.39 mmol/L. Furthermore, the concentration of total bilirubin in the cows of the experimental group was within the physiological range (x = 4.09± 1.42 μmol/L), while in the cows of the control group it was significantly higher (p<0.05) and stood at 10.19±5.16 μmol/l