Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/18997 |
Resumo: | We evaluated the physicochemical composition and fatty acid profile of milk from F1 Holstein × Zebu cows that were fed increasing levels of urea (0%, 33%, 66% and 100%, corresponding to 0%, 0.92%, 1.84% and 2.77% CP as NPN) as a substitute for soybean meal. Eight lactating F1 Holstein × Zebu cows producing an average of 10 kg of milk per day corrected to 3.5% fat, were placed in two 4 × 4 Latin squares (4 animals, 4 diets and 4 periods). Each experimental period lasted 18 days. Milk samples from each cow were collected from morning and afternoon milkings and analyzed for composition and fatty acid concentration. Milk urea nitrogen increased linearly (P < 0.05) with increasing dietary urea. Other variables including fat content, protein, fixed mineral residues, lactose, total nonfat solids, acidity, density, casein, cryoscopic index, somatic cell count, and milk fatty acid concentrations, were not affected by treatment. Thus, urea provides a viable alternative to soybean meal that does not affect the characteristics of milk from primiparous F1 Holstein × Zebu cows, producing up to 10 kg of milk corrected to 3.5% fat day-1. |
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Semina. Ciências Agrárias (Online) |
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Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of ureaComposição físico-química e perfil de ácidos graxos do leite de vacas F1 Holandês x Zebu alimentadas com teores crescentes de ureiaPhysicochemical compositionSoybean mealNon-protein nitrogen.Composição físico-químicaFarelo de sojaNitrogênio não protéico.We evaluated the physicochemical composition and fatty acid profile of milk from F1 Holstein × Zebu cows that were fed increasing levels of urea (0%, 33%, 66% and 100%, corresponding to 0%, 0.92%, 1.84% and 2.77% CP as NPN) as a substitute for soybean meal. Eight lactating F1 Holstein × Zebu cows producing an average of 10 kg of milk per day corrected to 3.5% fat, were placed in two 4 × 4 Latin squares (4 animals, 4 diets and 4 periods). Each experimental period lasted 18 days. Milk samples from each cow were collected from morning and afternoon milkings and analyzed for composition and fatty acid concentration. Milk urea nitrogen increased linearly (P < 0.05) with increasing dietary urea. Other variables including fat content, protein, fixed mineral residues, lactose, total nonfat solids, acidity, density, casein, cryoscopic index, somatic cell count, and milk fatty acid concentrations, were not affected by treatment. Thus, urea provides a viable alternative to soybean meal that does not affect the characteristics of milk from primiparous F1 Holstein × Zebu cows, producing up to 10 kg of milk corrected to 3.5% fat day-1.Objetivou-se avaliar a composição físico-química e o perfil de ácidos graxos do leite de vacas F1 Holandês × Zebu alimentadas com teores crescentes de ureia (0; 33%; 66% e 100%, que corresponderam a 0, 0,92, 1,84 e 2,77% de PB na forma de NNP), em substituição ao farelo de soja. Foram utilizadas oito vacas F1 Holandês × Zebu com produção média de 10 kg de leite corrigido para 3,5% de gordura dia-1, em duplo quadrados latinos 4 × 4 (4 animais, 4 dietas e 4 períodos). Os períodos tiveram dezoito dias. As amostras de leite de cada vaca, da ordenha da manhã e da tarde, foram coletadas e analisadas quanto à composição e a concentração de ácidos graxos. O nitrogênio uréico no leite aumentou linearmente (P<0,05) em função dos teores de ureia na dieta. Outras variáveis, incluindo os teores de gordura, proteína, resíduo mineral fixo, lactose, extrato seco total e desengordurado, acidez, densidade, caseína, índice crioscópico, contagem de células somáticas, e a concentração de ácidos graxos do leite, não sofreram efeito dos tratamentos. Portanto conclui-se que a substituição total do farelo de soja pela uréia não influencia composição e nem a concentração de ácidos graxos do leite de vacas primíparas F1 Holandês × Zebu, com produção de até 10 kg de leite corrigido para 3,5% de gordura dia-1.UEL2015-12-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/1899710.5433/1679-0359.2015v36n6Supl2p4435Semina: Ciências Agrárias; Vol. 36 No. 6Supl2 (2015); 4435-4446Semina: Ciências Agrárias; v. 36 n. 6Supl2 (2015); 4435-44461679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/18997/17660http://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessSouza, Vanice Mendes deRocha Júnior, Vicente RibeiroCaldeira, Luciana AlbuquerqueAntunes, Ana Paula da SilvaRuas, José Reinaldo MendesSouza, Criszoel FerreiraAguiar, Ana Cássia Rodrigues deLanna, Dante Pazzanese Duarte2022-12-02T15:25:27Zoai:ojs.pkp.sfu.ca:article/18997Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-12-02T15:25:27Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea Composição físico-química e perfil de ácidos graxos do leite de vacas F1 Holandês x Zebu alimentadas com teores crescentes de ureia |
title |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
spellingShingle |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea Souza, Vanice Mendes de Physicochemical composition Soybean meal Non-protein nitrogen. Composição físico-química Farelo de soja Nitrogênio não protéico. |
title_short |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
title_full |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
title_fullStr |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
title_full_unstemmed |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
title_sort |
Physicochemical composition and fatty acid profile of milk from F1 Holstein x Zebu cows fed with increasing concentrations of urea |
author |
Souza, Vanice Mendes de |
author_facet |
Souza, Vanice Mendes de Rocha Júnior, Vicente Ribeiro Caldeira, Luciana Albuquerque Antunes, Ana Paula da Silva Ruas, José Reinaldo Mendes Souza, Criszoel Ferreira Aguiar, Ana Cássia Rodrigues de Lanna, Dante Pazzanese Duarte |
author_role |
author |
author2 |
Rocha Júnior, Vicente Ribeiro Caldeira, Luciana Albuquerque Antunes, Ana Paula da Silva Ruas, José Reinaldo Mendes Souza, Criszoel Ferreira Aguiar, Ana Cássia Rodrigues de Lanna, Dante Pazzanese Duarte |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Souza, Vanice Mendes de Rocha Júnior, Vicente Ribeiro Caldeira, Luciana Albuquerque Antunes, Ana Paula da Silva Ruas, José Reinaldo Mendes Souza, Criszoel Ferreira Aguiar, Ana Cássia Rodrigues de Lanna, Dante Pazzanese Duarte |
dc.subject.por.fl_str_mv |
Physicochemical composition Soybean meal Non-protein nitrogen. Composição físico-química Farelo de soja Nitrogênio não protéico. |
topic |
Physicochemical composition Soybean meal Non-protein nitrogen. Composição físico-química Farelo de soja Nitrogênio não protéico. |
description |
We evaluated the physicochemical composition and fatty acid profile of milk from F1 Holstein × Zebu cows that were fed increasing levels of urea (0%, 33%, 66% and 100%, corresponding to 0%, 0.92%, 1.84% and 2.77% CP as NPN) as a substitute for soybean meal. Eight lactating F1 Holstein × Zebu cows producing an average of 10 kg of milk per day corrected to 3.5% fat, were placed in two 4 × 4 Latin squares (4 animals, 4 diets and 4 periods). Each experimental period lasted 18 days. Milk samples from each cow were collected from morning and afternoon milkings and analyzed for composition and fatty acid concentration. Milk urea nitrogen increased linearly (P < 0.05) with increasing dietary urea. Other variables including fat content, protein, fixed mineral residues, lactose, total nonfat solids, acidity, density, casein, cryoscopic index, somatic cell count, and milk fatty acid concentrations, were not affected by treatment. Thus, urea provides a viable alternative to soybean meal that does not affect the characteristics of milk from primiparous F1 Holstein × Zebu cows, producing up to 10 kg of milk corrected to 3.5% fat day-1. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12-16 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/18997 10.5433/1679-0359.2015v36n6Supl2p4435 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/18997 |
identifier_str_mv |
10.5433/1679-0359.2015v36n6Supl2p4435 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/18997/17660 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 36 No. 6Supl2 (2015); 4435-4446 Semina: Ciências Agrárias; v. 36 n. 6Supl2 (2015); 4435-4446 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306072633114624 |