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Vitamin E and Selenium Concentrations in Month-Old Beef Calves

Three groups of beef cow and calf pairs were studied to determine plasma vitamin E and blood selenium (Se) concentrations of calves at 1 month old. Group 1 was managed on irrigated pasture and calves received no Se/vitamin E injections at birth. Group 2 was managed on irrigated pasture, and the calves were injected with Se/vitamin E at birth. Group 3 was managed on dry foothill grasslands, and these cows were supplemented with 56.3 mg vitamin E and 3 mg Se daily, and the calves received a Se/vitamin E injection at birth. The plasma concentration of vitamin E in group 1 and 2 cows (9.5 ± 1.24 and 8.43 ± 1.0 μg/ml. respectively) was significantly higher than that of the group 3 cows (2.28 ± 0.42 μg/ml; P < 0.05). The blood Se concentrations in group 3 cows (169 ± 37 ng/ml) were significantly higher than those in group 1 and 2 cows (36.4 ± 15.9 and 31.1 ± 12.5 ng/ml, respectively; P < 0.05). Calf Se was highly correlated to cow Se (r = 0.965), and calf vitamin E was moderately correlated to cow vitamin E (r = 0.605). Calf vitamin E concentrations were consistently lower than cow vitamin E concentrations, and many values would be considered deficient.