Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848

Detalhes bibliográficos
Autor(a) principal: Soares Cruz, Maria Cláudia
Data de Publicação: 2008
Outros Autores: Véras, Antonia Sherlânea Chaves, Ferreira, Marcelo de Andrade, Batista, Angela Maria Vieira, Santos, Djalma Cordeiro dos, Coelho, Marcelo Iran de Souza
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Scientiarum. Animal Sciences (Online)
Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/848
Resumo: The effects of the soybean when replaced by a mixture of urea and cassava, in rations composed of forage cactus, sorghum silage and concentrate, were assessed on: (i) urea concentration; (ii) nitrogen (N) balance; and (iii) total endogenous loss estimate. Eight lactating Holstein/Zebu cows were distributed in two 4x4 simultaneous latin squares. Urea and N-urea concentration in plasma and milk (mg dL-1), and milk N-urea (g day-1) were not affected by the increase of urea levels in the ration; their means were 31.37, 14.62, 37.43, 17.44, and 5.37, respectively. Also, urea and N-urea urinary excretion were not affected by the increase of urea levels in the ration, and the mean values of those parameters were 249.45 and 116.24 mg kg-1 LW, respectively. The treatments did not influence N levels, with average values of 87.75, 87.63, 62.91, and 60.97 g day-1 to 0, 1.06, 2.12 e 3.20 % of urea addition in the ration, respectively. The endogenous loss estimate varied according to the nutritional demand system used.
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spelling Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848Balanço de nitrogênio e estimativas de perdas endógenas em vacas lactantes alimentadas com dietas contendo palma forrageira e teores crescentes de uréia e mandioca - DOI: 10.4025/actascianimsci.v28i1.848bovinosleiteplasmauréiaurina.5.04.00.00-2 ZootecniaThe effects of the soybean when replaced by a mixture of urea and cassava, in rations composed of forage cactus, sorghum silage and concentrate, were assessed on: (i) urea concentration; (ii) nitrogen (N) balance; and (iii) total endogenous loss estimate. Eight lactating Holstein/Zebu cows were distributed in two 4x4 simultaneous latin squares. Urea and N-urea concentration in plasma and milk (mg dL-1), and milk N-urea (g day-1) were not affected by the increase of urea levels in the ration; their means were 31.37, 14.62, 37.43, 17.44, and 5.37, respectively. Also, urea and N-urea urinary excretion were not affected by the increase of urea levels in the ration, and the mean values of those parameters were 249.45 and 116.24 mg kg-1 LW, respectively. The treatments did not influence N levels, with average values of 87.75, 87.63, 62.91, and 60.97 g day-1 to 0, 1.06, 2.12 e 3.20 % of urea addition in the ration, respectively. The endogenous loss estimate varied according to the nutritional demand system used.Foram avaliados os efeitos da substituição do farelo de soja pela mistura uréia mais mandioca, em rações constituídas de palma, silagem de sorgo e concentrado, sobre concentrações de uréia, balanço de nitrogênio (N) e estimativas de perdas endógenas totais em 8 vacas Girolando em lactação, distribuídas em dois quadrados latinos simultâneos (4x4). As concentrações de uréia e N-uréico no plasma e leite, em mg/dL e N-uréico no leite (g/dia) não foram afetadas pelo aumento do nível de uréia na ração, apresentando médias de 31,37; 14,62; 37,43; 17,44; 5,37. As excreções urinárias de uréia e N-uréico também não foram influenciadas, com médias de 249,45 e 116,24 mg/kg PV. Igualmente, o balanço de N não foi afetado pelos tratamentos, cujos valores médios foram de 87,75; 87,63; 62,91; 60,97 g/dia, respectivamente, para 0%, 1,00%, 1,90% e 2,86% de uréia na ração. As estimativas das perdas endógenas variaram de acordo com o sistema de exigência nutricional utilizado.Editora da Universidade Estadual de Maringá2008-02-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/84810.4025/actascianimsci.v28i1.848Acta Scientiarum. Animal Sciences; Vol 28 No 1 (2006); 47-56Acta Scientiarum. Animal Sciences; v. 28 n. 1 (2006); 47-561807-86721806-2636reponame:Acta Scientiarum. Animal Sciences (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttps://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/848/410Soares Cruz, Maria CláudiaVéras, Antonia Sherlânea ChavesFerreira, Marcelo de AndradeBatista, Angela Maria VieiraSantos, Djalma Cordeiro dosCoelho, Marcelo Iran de Souzainfo:eu-repo/semantics/openAccess2024-05-17T13:03:15Zoai:periodicos.uem.br/ojs:article/848Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/oaiactaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com1807-86721806-2636opendoar:2024-05-17T13:03:15Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
Balanço de nitrogênio e estimativas de perdas endógenas em vacas lactantes alimentadas com dietas contendo palma forrageira e teores crescentes de uréia e mandioca - DOI: 10.4025/actascianimsci.v28i1.848
title Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
spellingShingle Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
Soares Cruz, Maria Cláudia
bovinos
leite
plasma
uréia
urina.
5.04.00.00-2 Zootecnia
title_short Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
title_full Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
title_fullStr Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
title_full_unstemmed Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
title_sort Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava - DOI: 10.4025/actascianimsci.v28i1.848
author Soares Cruz, Maria Cláudia
author_facet Soares Cruz, Maria Cláudia
Véras, Antonia Sherlânea Chaves
Ferreira, Marcelo de Andrade
Batista, Angela Maria Vieira
Santos, Djalma Cordeiro dos
Coelho, Marcelo Iran de Souza
author_role author
author2 Véras, Antonia Sherlânea Chaves
Ferreira, Marcelo de Andrade
Batista, Angela Maria Vieira
Santos, Djalma Cordeiro dos
Coelho, Marcelo Iran de Souza
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Soares Cruz, Maria Cláudia
Véras, Antonia Sherlânea Chaves
Ferreira, Marcelo de Andrade
Batista, Angela Maria Vieira
Santos, Djalma Cordeiro dos
Coelho, Marcelo Iran de Souza
dc.subject.por.fl_str_mv bovinos
leite
plasma
uréia
urina.
5.04.00.00-2 Zootecnia
topic bovinos
leite
plasma
uréia
urina.
5.04.00.00-2 Zootecnia
description The effects of the soybean when replaced by a mixture of urea and cassava, in rations composed of forage cactus, sorghum silage and concentrate, were assessed on: (i) urea concentration; (ii) nitrogen (N) balance; and (iii) total endogenous loss estimate. Eight lactating Holstein/Zebu cows were distributed in two 4x4 simultaneous latin squares. Urea and N-urea concentration in plasma and milk (mg dL-1), and milk N-urea (g day-1) were not affected by the increase of urea levels in the ration; their means were 31.37, 14.62, 37.43, 17.44, and 5.37, respectively. Also, urea and N-urea urinary excretion were not affected by the increase of urea levels in the ration, and the mean values of those parameters were 249.45 and 116.24 mg kg-1 LW, respectively. The treatments did not influence N levels, with average values of 87.75, 87.63, 62.91, and 60.97 g day-1 to 0, 1.06, 2.12 e 3.20 % of urea addition in the ration, respectively. The endogenous loss estimate varied according to the nutritional demand system used.
publishDate 2008
dc.date.none.fl_str_mv 2008-02-15
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/848
10.4025/actascianimsci.v28i1.848
url https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/848
identifier_str_mv 10.4025/actascianimsci.v28i1.848
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/848/410
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 Editora da Universidade Estadual de Maringá
publisher.none.fl_str_mv Editora da Universidade Estadual de Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Animal Sciences; Vol 28 No 1 (2006); 47-56
Acta Scientiarum. Animal Sciences; v. 28 n. 1 (2006); 47-56
1807-8672
1806-2636
reponame:Acta Scientiarum. Animal Sciences (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum. Animal Sciences (Online)
collection Acta Scientiarum. Animal Sciences (Online)
repository.name.fl_str_mv Acta Scientiarum. Animal Sciences (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv actaanim@uem.br||actaanim@uem.br|| rev.acta@gmail.com
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