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| Registros recuperados : 40 | |
| 6. |  | IMAIZUMI, H.; SANTOS, F. A. P.; PIRES, A. V.; JUCHEM, S. de O. Fontes protéicas e de amido com diferentes degradabilidades ruminais para alimentar vacas leiteiras. Pesquisa Agropecuária Brasileira, Brasília, DF, v.41, n. 9, p. 1413-1420, set. 2006 Título em inglês: Protein and starch sources varying in rumen degradability to feed dairy cows.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 7. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H. Nitrogênio uréico no leite, no plasma, peso vivo e condição corporal de vacas em lactação mantidas em pastagens de Pennisetum purpureum em diferentes intervalos entre pastejos. In: CONGRESSO BRASILEIRO DE ZOOTECNIA, 17.; CONGRESSO INTERNACIONAL DE ZOOTECNIA, 4.; REUNIÃO NACIONAL DE ENSINO DE ZOOTECNIA, 13., 2007, Londrina. A zootecnia frente a novos desafios: anais... Londrina: Universidade Estadual de Londrina, 2007. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 9. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H. Desempenho lactacional individual e por área de vacas da raça Holandesa mantidas em pastagens de Pennisetum purpureum em dois intervalos entre pastejos. In: CONGRESSO BRASILEIRO DE ZOOTECNIA, 17.; CONGRESSO INTERNACIONAL DE ZOOTECNIA, 4.; REUNIÃO NACIONAL DE ENSINO DE ZOOTECNIA, 13., 2007, Londrina. A zootecnia frente a novos desafios: anais... Londrina: Universidade Estadual de Londrina, 2007. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 11. | | OLIVEIRA JUNIOR, R. C. de; PIRES, A. V.; SUSIN, I.; FERNANDES, J. J. de R.; SANTOS, F. A. P. Digestibilidade de nutrientes em dietas de bovinos contendo uréia ou amiréia em substituição ao farelo de soja. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 39, n. 2, p. 173-178, fev. 2004 Título em inglês: Nutrient digestibility in cattle diet with urea or starea replacing soybean meal.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 12. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; BITTAR, C. M. M.; IMAIZUMI, H.; CORTINHAS, C. S. Diferentes teores de proteína metabolizável em rações com cana-de-açúcar para vacas em lactação. Ciência Animal Brasileira, Goiânia, v. 9, n. 2, p. 309-318, abr./jun. 2008.| Biblioteca(s): Embrapa Semiárido. |
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| 13. | | NUSSIO, C. M. B.; SANTOS, F. A. P.; PIRES, A. V.; SIMAS, J. M. C.; ZOPOLLATTO, M. Fontes de amido de diferentes degradabilidades e sua substituição parcial por polpa de citrus em dietas para vacas leiteiras. Acta Scientiarum, Maringá, v.24, n.4, p.1079-1086, 2002.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 14. | | MARQUES, R. S.; PEDROSO, A. M.; DIAS, C. T. S.; PINTO L. R. M.; SANTOS, F. A. P. Effect of chromium supplementation on finishing Nellore bulls performance, carcass characteristics, and liver abscesse. Journal Animal Science, v. 89, (E-Suppl. 1); Journal of Dairy Science, v. 89 (E-Suppl. 1), p. 450, 2011| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 15. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H.; PIRES, A. V.; PENATI, M. A. Metabolizable protein supply according to the NRC (2001) for dairy cows grazing elephant grass. Scientia Agricola, Piracicaba, v. 65, n. 2, p. 130-138, mar./abr. 2008.| Biblioteca(s): Embrapa Semiárido. |
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| 17. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H.; CLARINDO, R. L.; PENATI, M. A. Composição morfológica e bromatológica de pastagens de Pennisetum pirpureum submetidas a diferentes intervalos entre pastejos. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 44., 2007, Jaboticabal. Anais... Jaboticabal: Unesp: SBZ, 2007. 1 CD-ROM| Biblioteca(s): Embrapa Semiárido. |
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| 18. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; CLARINDO, R. L.; PENATI, M. A.; IMAIZUMI, H. Características produtivas e qualitativas do capim-elefante pastejado em intervalo fixo ou variável de acordo com a interceptação da radiação fotossinteticamente ativa. Revista Brasileira de Zootecnia, Viçosa, MG, v. 39, n. 5, p. 1002-1010, 2010.| Biblioteca(s): Embrapa Semiárido. |
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| 19. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H.; CLARINDO, R. L.; PENATI, M. A. Características produtivas e qualitativas de pastagens de Pennisetum purpureum submetidas a diferentes intervalos entre pastejos. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 44., 2007, Jaboticabal. Anais... Jaboticabal: Unesp: SBZ, 2007. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 20. | | VOLTOLINI, T. V.; SANTOS, F. A. P.; MARTINEZ, J. C.; IMAIZUMI, H.; CLARINDO, R. L.; PENATI, M. A. Produção e composição do leite de vacas mantidas em pastagens de capim-elefante submetidas a duas frequências de pastejo. Revista Brasileira de Zootecnia, Viçosa, MG, v. 39, n. 1, p. 121-127, 2010.| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 40 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
12/12/2012 |
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Data da última atualização: |
10/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
DANES, M. A. C.; CHAGAS, L. J.; SANTOS, F. A. P.; PEDROSO, A. M. |
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Afiliação: |
MARINA A. C. DANES, USP-ESALQ; LUCAS L. CHAGAS, USP-ESALQ; FLAVIO AUGUSTO PORTELA SANTOS, USP-ESALQ; ALEXANDRE MENDONCA PEDROSO, CPPSE. |
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Título: |
Effect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 96, n. 1, p. 1-13, nov. 2012. |
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DOI: |
10.3168/jds.2012-5607 |
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Idioma: |
Português |
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Conteúdo: |
The objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same treatments described as well as a fourth treatment with 13.4% CP in the concentrate, in which urea replaced SSBM as the main N source. Ruminal volatile fatty acid concentration and microbial synthesis were not affected by levels or sources of N in the concentrate. Ruminal NH3N content increased as the concentrate CP content increased. Inclusion of SSBM in the concentrate did not increase production and decreased the ENU of midlactation dairy cows grazing on tropical forage. Supplementation of an 8.7% CP concentrate, resulting in a diet with CP levels between 15.3 and 15.7% of dry matter, was sufficient to meet the protein requirements of such milk production, with the highest ENU (18.4%). MenosThe objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same... Mostrar Tudo |
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Palavras-Chave: |
Protein supplementation; Tropical pasture. |
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Thesaurus NAL: |
nitrogen metabolism. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02857naa a2200205 a 4500
001 1942179
005 2023-03-10
008 2012 bl uuuu u00u1 u #d
024 7 $a10.3168/jds.2012-5607$2DOI
100 1 $aDANES, M. A. C.
245 $aEffect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass.$h[electronic resource]
260 $c2012
520 $aThe objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same treatments described as well as a fourth treatment with 13.4% CP in the concentrate, in which urea replaced SSBM as the main N source. Ruminal volatile fatty acid concentration and microbial synthesis were not affected by levels or sources of N in the concentrate. Ruminal NH3N content increased as the concentrate CP content increased. Inclusion of SSBM in the concentrate did not increase production and decreased the ENU of midlactation dairy cows grazing on tropical forage. Supplementation of an 8.7% CP concentrate, resulting in a diet with CP levels between 15.3 and 15.7% of dry matter, was sufficient to meet the protein requirements of such milk production, with the highest ENU (18.4%).
650 $anitrogen metabolism
653 $aProtein supplementation
653 $aTropical pasture
700 1 $aCHAGAS, L. J.
700 1 $aSANTOS, F. A. P.
700 1 $aPEDROSO, A. M.
773 $tJournal of Dairy Science$gv. 96, n. 1, p. 1-13, nov. 2012.
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