Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows

Detalhes bibliográficos
Autor(a) principal: Rego, Oldemiro Aguiar do
Data de Publicação: 2008
Outros Autores: Regalo, S. M. M., Rosa, Henrique José Duarte, Alves, Susana Paula A., Borba, Alfredo Emílio Silveira de, Bessa, Rui José B., Cabrita, Ana R. J., Fonseca, A. J. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.3/2619
Resumo: Copyright © American Dairy Science Association, 2008.
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spelling Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cowsDairy CowGrass Silage and Protein SupplementationGrazingMilk Fatty AcidCopyright © American Dairy Science Association, 2008.The effects of supplementation with grass silage and replacement of some corn in the concentrate with soybean meal (SBM) on milk production, and milk fatty acid (FA) profiles were evaluated in a replicated 4 × 4 Latin square study using 16 dairy cows grazing pasture composed of ryegrass, Kentucky bluegrass, and white clover. Each experimental period lasted for 3 wk. The 4 dietary treatments were PC, 20 h of access to grazing pasture, supplemented with 6 kg/d of corn-based concentrate mixture (96% corn; C); PCSB, 20 h of access to grazing pasture, supplemented with 6 kg/d of corn- and SBM-based concentrate mixture (78% corn and 18% SBM; CSB); SC, 7 h of access to grazing pasture during the day and 13 h of ad libitum access to grass silage at night, supplemented with 6 kg/d of C concentrate; and SCSB, 7 h of access to grazing pasture during the day and 13 h of ad libitum access to grass silage at night, supplemented with 6 kg/d of CSB concentrate. The concentrate mixtures were offered twice each day in the milking parlor and were consumed completely. Grass silage supplementation reduced dietary crude protein and concentration of total sugars, and dietary SBM inclusion increased dietary crude protein concentration and decreased dietary starch concentration. Milk yield and energy-corrected milk were increased by SBM supplementation of cows with access to grass silage. Milk protein concentration was lower in cows offered grass silage, regardless of whether SBM was fed. Dietary SBM inclusion tended to increase milk fat concentration. Plasma urea N was reduced by silage feeding and increased by SBM supplementation. Supplementation with grass silage overnight could represent a useful strategy for periods of lower pasture availability. Dietary inclusion of SBM in solely grazing cows had no effects on milk production and composition, exacerbated the inefficient capture of dietary N, and increased diet cost. Grass silage supplementation affected milk FA profiles, increasing both the FA derived from de novo synthesis and those derived from rumen microbial biomass, and decreasing the sum of C18 FA (mostly derived from diet or from mobilization of adipose tissue reserves). Milk fat concentrations of conjugated linoleic acid cis-9, trans-11, vaccenic acid (18:1 trans-11), and linolenic acid (18:3n-3) were unaffected by grass silage supplementation, suggesting that partial replacement of pasture by unwilted grass silage does not compromise the dietary quality of milk fat for humans.American Dairy Science AssociationRepositório da Universidade dos AçoresRego, Oldemiro Aguiar doRegalo, S. M. M.Rosa, Henrique José DuarteAlves, Susana Paula A.Borba, Alfredo Emílio Silveira deBessa, Rui José B.Cabrita, Ana R. J.Fonseca, A. J. M.2014-01-20T13:04:18Z2008-072014-01-17T15:49:02Z2008-07-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.3/2619engRego, O.A.; Regalo, S.M.M.; Rosa, H.J.D.; Alves, S.P.; Borba, A.E.S.; Bessa, R.J.B.; Cabrita, A.R.J.; Fonseca, A.J.M. (2008). "Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows", «Journal of Dairy Science», 91(7): 2736-2743. http://dx.doi.org/10.3168/jds.2007-0786.0022-030210.3168/jds.2007-0786info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-20T14:30:28Zoai:repositorio.uac.pt:10400.3/2619Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:25:15.454224Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
title Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
spellingShingle Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
Rego, Oldemiro Aguiar do
Dairy Cow
Grass Silage and Protein Supplementation
Grazing
Milk Fatty Acid
title_short Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
title_full Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
title_fullStr Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
title_full_unstemmed Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
title_sort Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows
author Rego, Oldemiro Aguiar do
author_facet Rego, Oldemiro Aguiar do
Regalo, S. M. M.
Rosa, Henrique José Duarte
Alves, Susana Paula A.
Borba, Alfredo Emílio Silveira de
Bessa, Rui José B.
Cabrita, Ana R. J.
Fonseca, A. J. M.
author_role author
author2 Regalo, S. M. M.
Rosa, Henrique José Duarte
Alves, Susana Paula A.
Borba, Alfredo Emílio Silveira de
Bessa, Rui José B.
Cabrita, Ana R. J.
Fonseca, A. J. M.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade dos Açores
dc.contributor.author.fl_str_mv Rego, Oldemiro Aguiar do
Regalo, S. M. M.
Rosa, Henrique José Duarte
Alves, Susana Paula A.
Borba, Alfredo Emílio Silveira de
Bessa, Rui José B.
Cabrita, Ana R. J.
Fonseca, A. J. M.
dc.subject.por.fl_str_mv Dairy Cow
Grass Silage and Protein Supplementation
Grazing
Milk Fatty Acid
topic Dairy Cow
Grass Silage and Protein Supplementation
Grazing
Milk Fatty Acid
description Copyright © American Dairy Science Association, 2008.
publishDate 2008
dc.date.none.fl_str_mv 2008-07
2008-07-01T00:00:00Z
2014-01-20T13:04:18Z
2014-01-17T15:49:02Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.3/2619
url http://hdl.handle.net/10400.3/2619
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Rego, O.A.; Regalo, S.M.M.; Rosa, H.J.D.; Alves, S.P.; Borba, A.E.S.; Bessa, R.J.B.; Cabrita, A.R.J.; Fonseca, A.J.M. (2008). "Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cows", «Journal of Dairy Science», 91(7): 2736-2743. http://dx.doi.org/10.3168/jds.2007-0786.
0022-0302
10.3168/jds.2007-0786
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Dairy Science Association
publisher.none.fl_str_mv American Dairy Science Association
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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