Authors : R. Kupczynski, R. Bodarski, W. Janeczek and M. Kuczaj
Abstract: The aim of this study was to evaluate of two short-term methods of feeding with glycerin and propylene glycol that were fed to Holstein-Friesian cows directly per os or top dressing with TMR. The study included both lipid-carbohydrate transformations, selected enzymes activity and milk yield. To the experiment 50 multiparous cows were included. The cows were divided on 5 group\s: Group I (n = 10); control group that received standard TMR, Group II (n = 10); receiving 300 mL day-1 of glycerin per os, Group III (n = 10); receiving 300 mL day-1 of glycol, Group IV (n = 10); receiving 300 mL day-1 of glycerin top dressed with TMR dose and Group V (n = 10); receiving 300 mL day-1 of propylene glycol also top dressed with TMR. The preparation were feed from 1 week before parturition to 5th day postpartum. Blood samples were taken 1 week before parturition and 5 and 28 days postpartum. Biochemical analyses were executed with use of Pentra 400 analyzer of Horriba ABX. The condition of cows, milk yield and milk composition were also estimated. No significant effect of glucogenic compound kind on milk yield and composition was affirmed. Propylene glycol and glycerin caused the limitation of BHBA growth at 5th day after parturition. In the control group, this increase was significant (p<0.01). At the day of finish the feeding of preparation, the highest glucose concentration was affirmed in group that received glycerin (Group II and IV). In the control group the lipolysis was more intensified (1.35 mmol L-1). Total bilirubin concentration in blood increased after parturition however, at groups that received the preparation per os and glycerin to TMR dose this growth was not as significant as at control cows (p<0.01) to 11.36 μmol L-1. The similar tendencies were observed in AST and GGT activity.
R. Kupczynski, R. Bodarski, W. Janeczek and M. Kuczaj, 2012. Effect of Glycerol and Propylene Glycol Supplementation on Metabolic Parameters and Production Performance in Periparturient Period of Dairy Cows. Agricultural Journal, 7: 88-94.