Document Detail

Reproductive and metabolic characteristics of dairy cattle supplemented with beta-carotene.
MedLine Citation:
PMID:  6378992     Owner:  NLM     Status:  MEDLINE    
Seventy-eight Holstein cows alternately were assigned at calving to receive beta-carotene supplementation or act as controls to determine effects of beta-carotene on reproduction and carotene, luteinizing hormone, progesterone, insulin, glucose, and glucagon concentrations in blood plasma. Cows were fed a corn silage-based complete ration. Biweekly jugular blood samples were collected beginning the week after parturition through 90 days. At day 30, supplemented cows received 600 mg synthetic beta-carotene daily for 60 days. Plasma carotene reached a peak of 2.45 micrograms/ml compared to 1.50 micrograms/ml in controls. Supplementation significantly increased plasma carotene but had no effect on luteinizing hormone, progesterone, insulin, glucose, glucagon, or reproductive measures. Days to first heat, days to first breeding, days open, and services per conception averaged 74, 74, 95, and 1.7 for supplemented cows and 64, 76, 102, and 1.9 for control cows. Progesterone increased as lactation progressed. Somatic cells were not different between supplemented and control cows. Supplementation of beta-carotene did not improve reproductive efficiency or alter luteinizing hormone, progesterone, insulin, glucose, or glucagon in blood plasma or affect somatic cells in milk.
E M Bindas; F C Gwazdauskas; R J Aiello; J H Herbein; M L McGilliard; C E Polan
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  67     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1984 Jun 
Date Detail:
Created Date:  1984-09-07     Completed Date:  1984-09-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1249-55     Citation Subset:  IM    
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MeSH Terms
Blood Glucose / metabolism
Carotenoids / administration & dosage*,  blood
Cattle / physiology*
Food, Fortified
Glucagon / blood
Insulin / blood
Luteinizing Hormone / blood
Progesterone / blood
beta Carotene
Reg. No./Substance:
0/Blood Glucose; 11061-68-0/Insulin; 36-88-4/Carotenoids; 57-83-0/Progesterone; 7235-40-7/beta Carotene; 9002-67-9/Luteinizing Hormone; 9007-92-5/Glucagon

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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