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DC Field | Value | Language |
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dc.contributor.author | Leiva, T. | - |
dc.contributor.author | Cooke, R. F. | - |
dc.contributor.author | Brandao, A. P. | - |
dc.contributor.author | Marques, R. S. | - |
dc.contributor.author | Vasconcelos, J. L. M. | - |
dc.date.accessioned | 2015-10-21T13:09:56Z | - |
dc.date.accessioned | 2016-10-25T20:59:38Z | - |
dc.date.available | 2015-10-21T13:09:56Z | - |
dc.date.available | 2016-10-25T20:59:38Z | - |
dc.date.issued | 2015-04-01 | - |
dc.identifier | http://www.ncbi.nlm.nih.gov/pubmed/26020212 | - |
dc.identifier.citation | Journal Of Animal Science. Champaign: Amer Soc Animal Science, v. 93, n. 4, p. 1896-1904, 2015. | - |
dc.identifier.issn | 0021-8812 | - |
dc.identifier.uri | http://hdl.handle.net/11449/128447 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/128447 | - |
dc.description.abstract | The objective of this experiment was to compare metabolic and milk production parameters in dairy cows supplemented and nonsupplemented with rumen-protected choline (RPC) during the transition period. Twenty-three nonlactating, multiparous, pregnant Holstein cows were ranked by BW and BCS 21 d before expected date of calving and immediately were assigned to receive (n = 12) or not receive (control; n = 11) RPC until 45 d in milk (DIM). Cows supplemented with RPC received (as-fed basis) 50 and 100 g/d of RPC (18.8% choline) before and after calving, respectively. Before calving, cows were maintained in 2 drylot pens according to treatment with ad libitum access to corn silage, and individually they received (as-fed basis) 3 kg/cow daily of a concentrate. Upon calving, cows were moved to 2 adjacent drylot pens according to treatment, milked twice daily, offered (as-fed basis) 35 kg/cow daily of corn silage, and individually received a concentrate formulated to meet their nutritional requirements after milking. The RPC was individually offered to cows as a topdressing into the morning concentrate feeding. Before calving, cow BW and BCS were recorded weekly, and blood samples were collected every 5 d beginning on d - 21 relative to expected calving date. Upon calving and until 45 DIM, BW and BCS were recorded weekly, individual milk production was recorded daily, and milk samples were collected once a week and analyzed for fat, protein, and total solids. Blood samples were collected every other day from 0 to 20 DIM and every 5 d from 20 to 45 DIM. Based on actual calving dates, cows receiving RPC or control began receiving treatments 16.8 +/- 1.7 and 17.3 +/- 2.0 d before calving, respectively. No treatment effects were detected (P >= 0.18) on postpartum concentrate intake, BW and BCS, or serum concentrations of cortisol, beta-hydroxybutyrate, NEFA, glucose, and IGF-I. Cows supplemented with RPC had greater (P <= 0.01) mean serum haptoglobin and insulin concentrations compared with control. Cows supplemented with RPC had greater (P < 0.01) milk protein, total solids (P < 0.01), and milk fat concentrations (P = 0.09) compared with control. No treatment effects were detected (P >= 0.43) for milk yield parameters, such as fat-corrected or solids-corrected milk yield. In conclusion, supplementing RPC to transition dairy cows increased haptoglobin and insulin concentrations and benefited milk composition. | en |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
dc.format.extent | 1896-1904 | - |
dc.language.iso | eng | - |
dc.publisher | Amer Soc Animal Science | - |
dc.source | Web of Science | - |
dc.subject | Choline | en |
dc.subject | Dairy cows | en |
dc.subject | Haptoglobin | en |
dc.subject | Insulin | en |
dc.subject | Milk production | en |
dc.subject | Transition period | en |
dc.title | Effects of rumen-protected choline supplementation on metabolic and performance responses of transition dairy cows | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Oregon State University | - |
dc.description.affiliation | Oregon State University | - |
dc.description.affiliationUnesp | Department of Animal Production, São Paulo State University, Botucatu 18168-000, Brazil | - |
dc.description.sponsorshipId | FAPESP: 2012/25390-3 | - |
dc.identifier.wos | WOS:000357090700048 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Journal Of Animal Science | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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