Vitamin E Status of Healthy Swedish Cattle* |
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Authors: | Pehrson Bo Hakkarainen Juhani |
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Institution: | 15.Experimental Station, Veterinary Institute, P. O. Box 234, S-532 00, Skara, Sweden ;25.Department of Clinical Nutrition, College of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden ; |
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Abstract: | Using high pressure liquid chromatography the serum concentration of vitamin E was measured in dairy cows fed either hay or silage as their main roughage, in calves fed milk-replacer, and in young intensively fed bulls. The concentrates fed to the cows, calves and bulls were supplemented with 5–10, 25 and 5–10 mg DL-α-tocopheryl acetate per kg, respectively, and the milk-replacer for the calves was supplemented with 50 mg DL-α-tooopheryl acetate per kg powder. Cows fed silage as their main roughage had higher serum vitamin E concentrations (
$${\rm{\bar x}}$$
: 3.8–5.2 mg/l) than cows fed only hay (
$${\rm{\bar x}}$$
: 2.5–4.1 mg/1). Lactating cows had higher vitamin E concentrations than dry cows (
$${\rm{\bar x}}$$
: 4.1–5.2 and 2.5–3.8 mg/l, respectively) and calves and bulls had much lower vitamin E concentrations (
$${\rm{\bar x}}$$
: 1.4 and 1.2 mg/l, respectively) than cows. Thirty per cent of the calves and 41 % of the bulls had serum vitamin E concentrations less than 1.0 mg/l, suggesting that in these animals the conventional level of supplementation of feeds with DL-α-tocopheryl acetate in Sweden is probably inadequate for the prevention of nutritional muscular degeneration and other negative effects. |
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