Veterinarski arhiv, Vol. 88 No. 6, 2018.
Izvorni znanstveni članak
https://doi.org/10.24099/vet.arhiv.0059
The effect of additional supplementation of vitamin E and zinc on endocrine and metabolic changes in dairy cows during peripartal period
Anjali Aggarwal
; Dairy Cattle Physiology Division, National Dairy Research Institute, Karnal, Haryana, India
Gulab Chandra
; Department of Veterinary Physiology and Biochemistry, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, Uttar Pradesh, India
Sažetak
The objective of this study was to measure the effect of vitamin E (Vit-E) and zinc (Zn) supplements on endocrine and metabolic changes in peripartum cows. Thirty-two crossbred (Holstein Friesian×Tharparkar) cows were selected 60 days before the expected date of calving. The cows were arbitrary allocated into 4 groups (n = 8), namely: the control, T1, T2, and T3. The feeding schedule was similar in all the groups except that in T1, T2, and T3 60 mg Zn/kg DM, 1000 IU Vit-E and 60 mg/kg + 1000 IU Zn + Vit-E were additionally added, respectively, from day 60 pre-calving to day 60 post-calving. Blood samples were taken on days 60, 45, 30, 15, and 7 before and after the expected day of calving and on the day of calving. Before calving, the cows showed a decrease in plasma leptin, insulin, glucose, Vit-E, and Zn levels, and an increase in plasma non-esterified fatty acid level. However, increases in plasma leptin, insulin, glucose, Vit-E, and Zn and a decrease of plasma non-esterified fatty acid were observed after calving. After calving, group T3 had higher (P<0.05) plasma leptin, insulin, and glucose concentrations than all the other groups. Plasma Vit-E levels were higher (P<0.05) in groups T2 and T3; however, the Zn level was higher (P<0.05) in groups T1 and T2. Milk yield was observed to be higher (P<0.05) in T3 than in the control and groups T1 and T2. The reduction in leptin, insulin, glucose, Vit-E, and Zn during peripartum was ameliorated by Vit-E and Zn supplementation
Ključne riječi
leptin; insulin; vitamin E; zinc; crossbred cows
Hrčak ID:
214755
URI
Datum izdavanja:
15.12.2018.
Posjeta: 1.170 *