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Effect of vitamin A and beta -carotene supplementation on beta -carotene and vitamin A status and on selected reproductive parameters of dairy cows in Borde


Effect of vitamin A and beta -carotene supplementation on beta -carotene and vitamin A status and on selected reproductive parameters of dairy cows in Borde



Symposium "Vitamine und Ergotropika" und Podiumsdiskussion zur Verzehrsregulation Reinhardsbrunn, 28-30 September 1987: 47-53



Cattle feeds in the beet region of Borde tend to be low in beta -carotene. On a traditional farm, supplementation of feeds with beta -carotene 300 mg daily increased plasma and liver beta -carotene and decreased plasma vitamin A whereas supplementation with vitamin A 80 000 IU had the opposite effect; changes on an industrial dairy unit were less marked and not significant.

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