| Effects of feeding rumen-protected choline on incidence of diseases and reproduction of dairy cows. | |
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MedLine Citation:
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PMID: 22178357 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The objectives of this study were to determine the effects of feeding rumen-protected choline (RPC) to dairy cows on the incidence of disease in early lactation, and on their fertility as measured by return to ovarian cyclicity and pregnancies per insemination (P/AI). In the first experiment, 369 cows were fed 15g/day of RPC between 25days pre-calving and 80days post calving. In the second experiment, 578 primigravid cows were fed 15g/day of RPC for the last 21days of gestation only. In both experiments, P/AI were evaluated for the first and second inseminations, and health disorders were monitored daily until 90days after calving. Return to cyclicity was evaluated in experiment 1 only, on days 51 and 61 post calving. In the first experiment, feeding RPC reduced the incidence of clinical ketosis, mastitis, and morbidity, and the number of cases of mastitis per cow. Feeding RPC did not influence cyclicity and P/AI. In the second experiment, cows fed RPC tended to have greater morbidity than controls because of an increased incidence of metritis and fever, although the incidence of retained fetal membranes was lower. The P/AI for first and second inseminations were similar between treatments. Supplementing the diets of dairy cattle with RPC from before until after calving improved the health of early lactation cows. However, in primigravid cows feeding RPC before calving only had mixed effects on health. Feeding RPC had no beneficial effects on reproduction in either experiment. |
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Authors:
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F S Lima; M F Sá Filho; L F Greco; J E P Santos |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-16 |
Journal Detail:
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Title: Veterinary journal (London, England : 1997) Volume: - ISSN: 1532-2971 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9706281 Medline TA: Vet J Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Animal Sciences, University of Florida, Gainesville, FL 32611, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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