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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

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