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Vitamin E Status of Healthy Swedish Cattle*

E-vitaminstatus hos svenska nötkreatur

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.

Sammanfattning

Med HPLC-analys av blodprov kartlades E-vitaminstatus hos mjölkkor som fick hö resp. ensilage som grovfoder, hos ej avvanda kalvar från samma besättningar och från intensivt uppfödda slakttjurar. Kraftfodret till korna, kalvarna och tjurarna hade berikats med 5–10, 25 resp. 5–10 mg DL-α-tokoferylacetat per kg och kalvarnas mjölkersättningspulver med 50 mg per kg. Kor från besättningar med ensilage som huvudsakligt grovfoder hade högre E-vitaminvärden i serum (\({\rm{\bar x}}\): 3,9–5,2 mg/1) än kor som fick enbart hö som grovfoder (\({\rm{\bar x}}\): 2,5–4,1 mg/1). Lakterande kor hade högre E-vitaminvärden än sinkor (\({\rm{\bar x}}\): 4,1–5,2 resp. 2,5–3,8 mg/1). Både kalvar och tjurar hade betydligt lägre värden (\({\rm{\bar x}}\): 1,4 resp. 1,2 mg/1) än korna. Trettio procent av kalvarna och 41 procent av tjurarna hade serumvärden understigande 1,0 mg/1. Detta tolkas som att de tilsatser av DL-α-tokoferylacetat till foder för dessa djurkategorier som f n är regel i Sverige sannolikt är otillräckliga för att eliminera risker för muskeldegeneration och andra negativa effekter.

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Pehrson, B., Hakkarainen, J. Vitamin E Status of Healthy Swedish Cattle*. Acta Vet Scand 27, 351–360 (1986). https://doi.org/10.1186/BF03548149

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