Relation of age, season, production, and health indices to iodine and beta-carotene concentrations in cow's milk

Milk samples were collected from 82 Holstein cows during the 1st yr of a 2-yr study and from 44 of these again in the 2nd yr to determine relationships of iodine and beta-carotene concentrations in milk to age, season, placental retention, uterine infections, clinical mastitis, services per concepti...

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Bibliographic Details
Published in:Journal of dairy science 1983-12, Vol.66 (12), p.2557-2562
Main Authors: Larson, L.L, Wallen, S.E, Owen, F.G, Lowry, S.R
Format: Article
Language:English
Subjects:
Age Factors
Animals
beta Carotene
Biological and medical sciences
Carotenoids - analysis
Cattle - physiology
Female
Food industries
Fundamental and applied biological sciences. Psychology
Iodine - analysis
Lactation
Mastitis, Bovine - metabolism
Milk - analysis
Milk - metabolism
Milk and cheese industries. Ice creams
Seasons
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Summary:Milk samples were collected from 82 Holstein cows during the 1st yr of a 2-yr study and from 44 of these again in the 2nd yr to determine relationships of iodine and beta-carotene concentrations in milk to age, season, placental retention, uterine infections, clinical mastitis, services per conception, and milk yield. Composite milk samples were collected twice weekly at the morning milking. Milk samples from each cow were pooled prior to analyses for the following three times: 1 to 7 wk and 8 to 14 wk postpartum in yr 1 and 1 to 6 wk postpartum in yr 2. Beta-carotene concentrations of milk were inversely related to milk yield and positively related to milk fat percentage. Concentrations tended to be higher for cows experiencing health problems, probably because of lower milk yields and the concommitent higher milk fat content. The relatively low milk iodine concentrations were not generally related to cow age, season of calving, milk yield, milk fat percentage, or to health and performance measures.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(83)82126-2