| Reproductive and metabolic characteristics of dairy cattle supplemented with beta-carotene. | |
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MedLine Citation:
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PMID: 6378992 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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E M Bindas; F C Gwazdauskas; R J Aiello; J H Herbein; M L McGilliard; C E Polan |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 67 ISSN: 0022-0302 ISO Abbreviation: J. Dairy Sci. Publication Date: 1984 Jun |
Date Detail:
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Created Date: 1984-09-07 Completed Date: 1984-09-07 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1249-55 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Glucose / metabolism Carotenoids / administration & dosage*, blood Cattle / physiology* Female Food, Fortified Glucagon / blood Insulin / blood Luteinizing Hormone / blood Progesterone / blood Reproduction* beta Carotene |
| Chemical | |
Reg. No./Substance:
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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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