Effect of zinc supplementation on hormonal and lipid peroxidation status of peri-parturient karan fries cows during heat stress condition

Abstract

Present study was carried out to evaluate the effect of Zinc (Zn) supplementation on hormonal and lipid peroxidation status of peri-parturient KF (Karan Fries) cows during heat stress. Cows were grouped as C (6), T1 (6) and T2 (6). C was fed basal diet alone; however T1 and T2 were fed with 80 ppm and 120 ppm Zn, respectively along with basal diet from 45 days prepartum to 45 days postpartum. It was found that Zn level was significantly (P<0.05) higher in supplemented group than control. Plasma cortisol was significantly (P<0.05) reduced in T2 compared to C and T1 at calving. T3 and T4 concentration decreased at pre-partum, increased at post-partum and was significantly (P<0.01) higher in T2 followed by T1 and C. TBARS level was significantly (P<0.01) lowered in T1 and T2 compared to control at postpartum. Result indicated that amelioration of heat stress by supplementation of Zn through reduced cortisol, TBARS and improved T3 & T4 concentration.