Carotenoids and vitamin a in the blood of dairy calves in Puerto Rico
1969 ◽
Vol 34
(4)
◽
pp. 316-321
Keyword(s):
The carotene and vitamin-A content of the blood of a group of dairy calves was determined at birth, before ingestion of colostrum, 24 and 72 hours after birth, and thereafter at monthly intervals until 4 months of age. There was a significant difference in carotene and vitamin-A between ages, the relationship being best described by a straight line. Carotene and vitamin A values compared favorably with those given in the United States for normal calves. Supplementation with vitamin-A during the period comprised between the third day after birth and effective grass consumption (5 weeks of age) is considered unnecessary.
Keyword(s):
2017 ◽
Vol 7
(1)
◽
pp. 7-17
◽
1995 ◽
Vol 37
(1)
◽
pp. 101-112
Keyword(s):
2000 ◽
Vol 9
(3)
◽
pp. 258-262
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