| Effect of rumen-protected choline and methionine on physiological and metabolic disorders and reproductive indices of dairy cows. | |
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MedLine Citation:
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PMID: 20455967 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The objective of this study was to investigate the effect of feeding different levels of ruminally protected methionine and choline on the incidence of physiological and metabolic disorders, production, and some of the reproductive indices of Holstein dairy cows. Forty Holstein dairy cows in their first and second lactation were used from 4-week pre-partum through 20-week post-partum and randomly assigned to receive one of the following treatments: 18 g/day of rumen-protected methionine (RPM), 60 g/day of rumen-protected choline (RPC), 18 g/day of RPM + 60 g/day of RPC, and neither supplement (control). The treatments significantly affected services per conception and open days of lactating dairy cows (p < 0.05), but did not affect significantly on days to first oestrus and number of pregnant cows. RPM + RPC-fed cows had the lowest open days, days to first oestrus and services per conception compared with other groups. The effect of treatments was significant on the incidence of metabolic and physiological problems except for foot/leg problems. Cows fed RPM+RPC had the lowest health problems compared with other groups (p < 0.05). Results indicate that the supplementation of RPM and RPC can improve reproductive performance and health status of dairy cows. |
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Authors:
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M Ardalan; K Rezayazdi; M Dehghan-Banadaky |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of animal physiology and animal nutrition Volume: 94 ISSN: 1439-0396 ISO Abbreviation: J Anim Physiol Anim Nutr (Berl) Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101126979 Medline TA: J Anim Physiol Anim Nutr (Berl) Country: Germany |
Other Details:
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Languages: eng Pagination: e259-65 Citation Subset: IM |
Copyright Information:
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© 2010 Blackwell Verlag GmbH. |
Affiliation:
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Department of Animal Science, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. m.ardalan87@gmail.com |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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