Vitamin E Status of Healthy Swedish Cattle*

Abstract

pressure liquid chromatography the serum concentraHon of vitamin E was measured in dairy cows fed either hay or silage as their main roughage, in calves fed milk-replacer, and m young intensively fed bulls. The concentrates fed to the cows, calves and bulls we.re supplemented with 5-10, 25 and 5-10 mg DL-cx-tocopheryl acetate pe.r kg, respectively, and the milk-replacer for the calves was supplemented with 50 mg DL-cx-tocopheryl acetate per kg powder. Cows fed silage as their madn roughage had higher serum vitamin E concentrations (x: 3.8-5.2 mg/I) than cows fed onJy hay (x: 2.5--4.1 mg/I). Lactating cows had higher vitamin E concentrations than dry cows (x: 4.1-5.2 and 2.5-3.8 mg/I, respectively) and calves and bulls had much lower vitamin E concentrations (x: 1.4 and 1.2 mg/I, ly) than cows. Thirty per cent of the calves and 41 % of the bulls had serum vitamin E concentrations less than 1.0 mg/I, suggesting that in thes•e aruimals the conventional leveJ of supplementation of feeds with DL-cx-tocopheryl acetate in Sweden is probably inadequate for the prevention of nutritional muscular degeneration and other negative effects. nutritional muscula,r degeneration; feed supplementation; cx-tocopherol; DL-cx-tocopheryl acetate; dairy cattle; milk-replacers; intensively fed young bu I Is; mi I k-f e d ca Ives; meat production.* The investigation was supported by the Swedish Council for Forestry and Agricultural Research.

Application of high-performance liquid chromatography to determine the concentration of α-tocopherol in the blood of cattle

“…The status of vitamin E is determined by its level in plasma or serum, and since tocopherol is not deposited in the body in significant quantities, it is believed that the level of tocopherol in the blood reliably reflects its consumption by animals (Pehrson & Hakkarainen, 1986).…”

Μελετη Της Επιδρασης Του Σεληνιου Και Της Βιταμινης Ε Στην Παραγωγη Αντισωματωνκατα Της Κολοβακτηριδιασης Των Βοοειδων

“…τροφής. ΧΟΡΗΓΗΣΗ ΤΗΣ ΒΙΤΑΜΙΝΗΣ Ε ΣΤΑ ΒΟΟΕΙΔΗ Η αδυναμία σύνθεσης της βιταμίνης Ε από τα ζώα και η απουσία ειδικού οργάνου αποθήκευσης της, καθιστούν αναγκαία την τακτική χορήγηση της(Rammel 1983, Pehrson & Hakkarainen 1986.Η βιταμίνη Ε χορηγείται θεραπευτικά και προληπτικά. Θεραπευτικά η βιταμίνη Ε χορηγείται παρεντερικά και per os, χωρίς να υπάρχει ακριβές δοσολογικό σχήμα(Friedrich 1988).…”

“…Η τιμή της βιταμίνης Ε την ημέρα Ο θεωρείται φυσιολογική σύμφωνα με τα διεθνή βιβλιογραφικά δεδομένα. Οι Hidiroglou & Williams (1986) αναφέρουν ως κατώτερο φυσιολογικό όριο βιταμίνης Ε ορού αίματος αγελάδων τα 3,5 pg/ml, οι Bayfield & Myllrea (1969) τα 4 pg/ml, ο Sconberg et al (1993) τα 3 pg/ml και οι Pehrson & Hakkarainen (1986) τα 4,1 -5,2 pg/ml για την περίοδο γαλακτοπαραγωγής και τα 2,5 -3,7 μg/ml για την ξηρά περίοδο.…”