RETINOL U KRVI SISAJUĆE ANGUS TELADI - RETINOL IN THE BLOOD OF SUCKLING ANGUS CALVES
Type de document
thesis
Langue source
Anglais
Titre français
Titre anglais
RETINOL U KRVI SISAJUĆE ANGUS TELADI - RETINOL IN THE BLOOD OF SUCKLING ANGUS CALVES
Auteur(s)
- VUJEC Iva
Editeur(s)
Autre(s)
Id
YI8T99MM
Version
3200
Date ajout
26 janvier 2021 17:12
Date modification
12 avril 2021 15:03
Résumé anglais
Vitamin A has a vital role in the immunity of young calves. The aim of this study
is to determine the retinol content in the plasma of angus calves and cows from birth
until the age of 4 months in a cow-calf operation. The experiment took place on an
organic cow farm. Ten cows and their calves were randomly selected and used to
determine the retinol plasma concentrations. The cows spent the first 60 postnatal
days in a stable where they were fed hay, haylage and rock salt containing vitamin A.
After 60 days the cows were let out with their calves onto pastures for the next 30
days. The retinol concentrations in calf plasma on the 1st, 4th, 30th, 59th and 90th days
were 19,9, 23,1, 16,4, 19,5 i 34,1 μg/dL. The retinol concentrations in cow plasma on
the 1st, 4th, 30th, 59th and 90th days were 24,3, 23,5, 24,4, 25,9, 39,3 μg/dL. Hay,
haylage and rock salt with vitamins contained enough vitamin A to adequately supply
the cows and the calves. A significant rise of retinol concentrations in the cow and
calf plasmas was noticed after feed changes were applied from hay and haylage to
pasturage.
Note
None
CRAW tags
- AB - Spécifique
- FREDO alimentation animale
- FREDO santé animale
- GEO Hongrie
- vitamin a
- bovin
- supplementation
- élevage
WEB tags
Date caractères
2019
Date publication
1 janvier 2019