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| Registros recuperados : 18 | |
| 1. |  | SILVESTRE, T.; MACHADO, F. S.; CAMPOS, M. M.; PEREIRA, L. G. R.; TOMICH, T. R.; RODRIGUES, P. Methane emission in tropical conditions. In: GREENHOUSE GAS AND ANIMAL AGRICULTURE CONFERENCE, 6., Melbourne, 2016. Anais... Melbourne: University of Melbourne, 2016.| Biblioteca(s): Embrapa Gado de Leite. |
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| 2. | | SILVESTRE, T.; FERREIRA, A. L.; MACHADO, F. S.; CAMPOS, M. M.; TOMICH, T. R.; PEREIRA, L. G. R.; RODRIGUES, P. H. M.; MARCONDES, M. I. Energy requirements of Holstein, Gyr, and Holstein x Gyr crossbred heifers using the respirometry technique. Frontiers in Animal Science, v. 3, 919515, 2022.| Biblioteca(s): Embrapa Gado de Leite. |
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| 3. | | CAMPOS, M. M.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; PANCOTI, C. G.; SILVA, R. R. E; SILVESTRE, T. Degradabilidade in situ da matéria seca e da matéria orgânica de cana de açúcar tratada ou não com óxido de cálcio, em novilhas leiteiras Holândes x Gir. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 49., 2012, Brasília. A produção animal no mundo em transformação: anais. Brasília, DF: SBZ, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 5. | | CAMPOS, M. M.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; PANCOTI, C. G.; SILVA, R. R. E; SILVESTRE, T. Desgradabilidade in situ das frações fibrosas da cana de açucar tratada ou não com óxido de calcio, em novilhas leiteiras holandes x gir. In: Reunião Anual da Sociedade Brasileira de Zootecnia, 48., 2011, Belém. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| 6. | | CAMPOS, M. M.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; PANCOTI, C. G.; SILVA, R. R. E; SILVESTRE, T.; MACHADO, F. S.; GOMES, S. P. Consumo de dietas contendo cana de açucar tratada ou não com oxido de calcio em vacas em lactação holandes x gir. In: Congresso Brasileiro de Zootecnia, 21., 2011, Maceió. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| 7. | | PANCOTI, C. G.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; SILVA, R. R.; CAMPOS, M. M.; SILVESTRE, T.; LAGE, H. F.; FACURY FILHO, E. J. Consumo e digestibilidade aparente do calcio e fosforo, em dietas contendo cana-de-açucar tratada ou não com oxido de calcio, em novilhas holandes x zebu. In: Congresso Brasileiro de Zootecnia, 21., 2011, Maceió. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| 8. | | SILVESTRE, T.; FERNANDES, P. B.; POSSAS, F. P.; MACHADO, F. S.; TOMICH, T. R.; CAMPOS, M. M.; PEREIRA, L. G. R.; RODRIGUES, P. H. M. Consumo de matéria seca por novilhas leiteiras Holandês, Gir e F1 Holandês-Gir sob diferentes planos nutricionais. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p.| Biblioteca(s): Embrapa Gado de Leite. |
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| 9. | | SILVESTRE, T.; REIS, L. G. DOS; MOREIRA, E. DE A.; FRANÇA, A. B.; MADEIRO, A. S.; PEREIRA, L. G. R.; MORENZ, M. J. F.; OLIVEIRA, J. S. e. Cinética de fermentação de silagem de milho com adição de glicerina bruta. In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 10. | | SILVESTRE, T.; REIS, L. G. DOS; MOREIRA, E. DE A.; PEREIRA, L. G. R.; TOMICH, T. R.; CAMPOS, M. M.; RODRIGUES, J. A. S.; GONÇALVES, L. C. Cinética de fermentação in vitro de silagem de sorgo em diferentes idades de corte. In: CONGRESSO INTERNACIONAL DO LEITE, 11.; WORKSHOP DE POLÍTICAS PÚBLICAS, 11.; SIMPÓSIO DE SUSTENTABILIDADE DA ATIVIDADE LEITEIRA, 12., 2012, Goiânia. Anais... Juiz de Fora: Embrapa Gado de Leite, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 11. | | CAMPOS, M. M.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; PANCOTI, C. G.; SILVA, R. R. E; SILVESTRE, T.; MACHADO, F. S.; GOMES, S. P. Digestibilidade aparente de dietas contendo cana de açucar tratada ou não com óxido de cálcio em vacas em lactações holandês x Gir. In: Congresso Brasileiro de Zootecnia, 21., 2011, Maceió. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| 12. | | CAMPOS, M. M.; BORGES, A. L. DA C. C.; LOPES, F. C. F.; PANCOTI, C. G.; SILVA, R. R. E; SILVESTRE, T. Parâmetros de dinâmica de fluxo da fase sólida de dietas contendo cana de açúcar tratada ou não com óxido de cálcio, em fêmeas bovinas leiteiras Holandês x Gir. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 49., 2012, Brasília. A produção animal no mundo em transformação: anais. Brasília, DF: SBZ, 2012.| Biblioteca(s): Embrapa Gado de Leite. |
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| 13. | | PANCOTI, C. G.; CAMPOS, M. M.; BORGES, A. L. DA C. C.; SILVA, R. R. E; SILVESTRE, T.; MACHADO, F. S.; GOMES, S. P. Parametros ruminais de dietas contendo cana de açucar tratada ou não com óxido de calcio, em femeas bovinas leiteiras holandes x gir. In: Congresso Brasileiro de Zootecnia, 21., 2011, Maceió. Anais...| Biblioteca(s): Embrapa Gado de Leite. |
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| 14. | | MARCONDES, M. I.; PROVAZZI, F. P.; SILVESTRE, T.; SILVA, A. L.; VALADARES FILHO, S. C.; CAMPOS, M. M.; MACHADO, F. S.; ROTTA, P. P. Protein requirements for pregnant dairy cows. Journal of Dairy Science, v. 106, p. 8821-8834, 2023.| Biblioteca(s): Embrapa Gado de Leite. |
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| 15. | | MARCONDES, M. I.; SILVESTRE, T.; DIJKSTRA, J.; PROVAZZI, F. P.; SILVA, A. L.; VALADARES FILHO, S. C.; CAMPOS, M. M.; MACHADO, F. S.; ROTTA, P. P. Protein requirements for pregnant dairy cows. Animal - Science Proceedings, v. 13, n. 3, p. 253-254, 2022. Edição dos Anais do VII International Symposium on Energy and Protein Metabolism and Nutrition, 2022, Granada, Spain.| Biblioteca(s): Embrapa Gado de Leite. |
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| 16. | | FERNANDES, P. B.; PACIULLO, D. S. C.; CARVALHO, C. A. B. de; SILVESTRE, T.; GOMIDE, C. A. de M.; PEREIRA, L. G. R. Valor nutritivo de Urochloa decumbens em sistemas pastoril e silvipastoril. In: CONGRESSO INTERNACIONAL DO LEITE, 13., 2015, Porto Alegre. Anais... Juiz de Fora: Embrapa Gado de Leite, 2015. 4 p.| Biblioteca(s): Embrapa Gado de Leite. |
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| 17. | | SILVESTRE, T.; PEREIRA, L. G. R.; RODRIGUES, P. H. M.; MACHADO, F. S.; TOMICH, T. R.; CAMPOS, M. M.; SANTOS, G. B.; VARGAS, M. W.; ALMEIDA, E. M.; MATA E SILVA, B. C. Enteric methane emission by Holstein, Gyr and F1 Holstein-Gyr dairy heifers. In: BIENNIAL CONFERENCE OF THE AUSTRALIAN SOCIETY OF ANIMAL PRODUCTION, 30., 2014, Canberra. Proceedings... Toowong: The Australian Society of Animal Production, 2014. p. 244| Biblioteca(s): Embrapa Gado de Leite. |
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| 18. | | SILVESTRE, T.; LIMA, M. A.; SANTOS, G. B. dos; PEREIRA, L. G. R.; MACHADO, F. S.; TOMICH, T. R.; CAMPOS, M. M.; JONKER, A.; RODRIGUES, P. H. M.; BRANDAO, V. L. N.; MARCONDES, M. I. Effects of feeding level and breed composition on intake, digestibility, and methane emissions of dairy heifers. Animals, v. 11, 586, 2021.| Biblioteca(s): Embrapa Gado de Leite. |
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| Registros recuperados : 18 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
16/10/2023 |
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Data da última atualização: |
22/01/2024 |
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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: |
MARCONDES, M. I.; PROVAZZI, F. P.; SILVESTRE, T.; SILVA, A. L.; VALADARES FILHO, S. C.; CAMPOS, M. M.; MACHADO, F. S.; ROTTA, P. P. |
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Afiliação: |
Washington State University; Universidade Federal de Viçosa; Washington State University; Universidade Federal de Viçosa; VALADARES FILHO, Universidade Federal de Viçosa; MARIANA MAGALHAES CAMPOS, CNPGL; FERNANDA SAMARINI MACHADO, CNPGL; Universidade Federal de Viçosa. |
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Título: |
Protein requirements for pregnant dairy cows. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 106, p. 8821-8834, 2023. |
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DOI: |
https://doi.org/10.3168/jds.2023-23321 |
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Idioma: |
Inglês |
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Conteúdo: |
We aimed to estimate the protein requirements of pregnant Holstein × Gyr cows. Sixty-one Holstein × Gyr (HG) cows were used, with an average initial BW of 480 ± 10.1 kg and 5 ± 0.5 yrs of age. Cows were divided into 3 groups: pregnant (n = 43), non-pregnant (n = 12), and baseline (n = 6). Baseline animals were slaughtered before starting the experiment to estimate the initial body composition of the remaining animals. Pregnant and non-pregnant cows received 2 diets: maintenance and ad libitum. Pregnant cows were slaughtered at 139, 199, 241, and 268 gestation days (GD). First, we used data only from non-pregnant cows to determine the requirements for maintenance and growth in adult cows. The requirements of metabolizable protein for maintenance (MPm; g/EBW0.75/d) were estimated using a linear regression between the metabolizable protein intake (MPI, g/d) and average daily gain (g/d), and the MPm was defined as the intercept divided by the average BW0.75. Net protein requirements for gain (NPg; g/d) were estimated by the first derivative of the allometric equation between final crude protein (CP) in the body (kg) and the final EBW (kg). The efficiency of use of metabolizable protein for gain (k) was calculated from the regression between the retained protein (g/EBW0.75/d) and the MPI (g/EBW0.75/d), and k was the slope of this regression. The MPI was estimated by combining microbial protein synthesis (purine derivatives) with the digestible rumen undegradable protein [(total protein intake minus RDP) × intestinal digestibility]. Second, an exponential model was used to fit the protein accumulation in the gestational components in the function of GD. The first derivative of that model was considered the net requirement for gestation (NPgest). The efficiency of protein utilization for gestation (kgest) was calculated by the iterative method using the equation: ? = MPI - (MPm + NPg/kg + NPgest/kgest). The iteration was performed aiming at a zero deviation between observed MPI and MP estimated by the requirements determined herein. We obtained a value of 3.88 g/EBW0.75/d for MPm. The estimation of NPg can be calculated according to the following equation: NPg = 0.716 × (EBWopen-0.308) × EBGcorrected, where EBWopen is the empty BW (kg) for non-pregnant animals and EBGcorrected is the empty body gain (kg/d) corrected for the gestational component. The k was determined as 0.347. The net protein requirements for gestation (NPgest) were determined as NPgest (g/d) = 0.0008722 × exp(0.01784 × GD) × (calfweight/35). The efficiency of using metabolizable protein for gestation (kgest) was 0.625. It is important to highlight that different methods of MP estimates should not be mixed and that the proposed method requires the estimate of microbial protein (estimate it via urinary estimates) and might be a limitation for practical application. In conclusion, new studies should be conducted to validate our results and the methodology adopted to determine protein requirements for pregnancy in dairy cows. Due to the pattern of protein accumulation in the gestational components, we suggest that exponential model to describe protein requirements for pregnancy for dairy cows. MenosWe aimed to estimate the protein requirements of pregnant Holstein × Gyr cows. Sixty-one Holstein × Gyr (HG) cows were used, with an average initial BW of 480 ± 10.1 kg and 5 ± 0.5 yrs of age. Cows were divided into 3 groups: pregnant (n = 43), non-pregnant (n = 12), and baseline (n = 6). Baseline animals were slaughtered before starting the experiment to estimate the initial body composition of the remaining animals. Pregnant and non-pregnant cows received 2 diets: maintenance and ad libitum. Pregnant cows were slaughtered at 139, 199, 241, and 268 gestation days (GD). First, we used data only from non-pregnant cows to determine the requirements for maintenance and growth in adult cows. The requirements of metabolizable protein for maintenance (MPm; g/EBW0.75/d) were estimated using a linear regression between the metabolizable protein intake (MPI, g/d) and average daily gain (g/d), and the MPm was defined as the intercept divided by the average BW0.75. Net protein requirements for gain (NPg; g/d) were estimated by the first derivative of the allometric equation between final crude protein (CP) in the body (kg) and the final EBW (kg). The efficiency of use of metabolizable protein for gain (k) was calculated from the regression between the retained protein (g/EBW0.75/d) and the MPI (g/EBW0.75/d), and k was the slope of this regression. The MPI was estimated by combining microbial protein synthesis (purine derivatives) with the digestible rumen undegradable protein [(total p... Mostrar Tudo |
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Thesagro: |
Bovino; Gado Leiteiro; Período de Gestação; Proteína; Vaca Leiteira. |
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Thesaurus NAL: |
Gestation period; Holstein; Pregnancy. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/260912/1/Protein-requirements-for-pregnant-dairy-cows.pdf
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Marc: |
LEADER 04078naa a2200313 a 4500
001 2157260
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008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3168/jds.2023-23321$2DOI
100 1 $aMARCONDES, M. I.
245 $aProtein requirements for pregnant dairy cows.$h[electronic resource]
260 $c2023
520 $aWe aimed to estimate the protein requirements of pregnant Holstein × Gyr cows. Sixty-one Holstein × Gyr (HG) cows were used, with an average initial BW of 480 ± 10.1 kg and 5 ± 0.5 yrs of age. Cows were divided into 3 groups: pregnant (n = 43), non-pregnant (n = 12), and baseline (n = 6). Baseline animals were slaughtered before starting the experiment to estimate the initial body composition of the remaining animals. Pregnant and non-pregnant cows received 2 diets: maintenance and ad libitum. Pregnant cows were slaughtered at 139, 199, 241, and 268 gestation days (GD). First, we used data only from non-pregnant cows to determine the requirements for maintenance and growth in adult cows. The requirements of metabolizable protein for maintenance (MPm; g/EBW0.75/d) were estimated using a linear regression between the metabolizable protein intake (MPI, g/d) and average daily gain (g/d), and the MPm was defined as the intercept divided by the average BW0.75. Net protein requirements for gain (NPg; g/d) were estimated by the first derivative of the allometric equation between final crude protein (CP) in the body (kg) and the final EBW (kg). The efficiency of use of metabolizable protein for gain (k) was calculated from the regression between the retained protein (g/EBW0.75/d) and the MPI (g/EBW0.75/d), and k was the slope of this regression. The MPI was estimated by combining microbial protein synthesis (purine derivatives) with the digestible rumen undegradable protein [(total protein intake minus RDP) × intestinal digestibility]. Second, an exponential model was used to fit the protein accumulation in the gestational components in the function of GD. The first derivative of that model was considered the net requirement for gestation (NPgest). The efficiency of protein utilization for gestation (kgest) was calculated by the iterative method using the equation: ? = MPI - (MPm + NPg/kg + NPgest/kgest). The iteration was performed aiming at a zero deviation between observed MPI and MP estimated by the requirements determined herein. We obtained a value of 3.88 g/EBW0.75/d for MPm. The estimation of NPg can be calculated according to the following equation: NPg = 0.716 × (EBWopen-0.308) × EBGcorrected, where EBWopen is the empty BW (kg) for non-pregnant animals and EBGcorrected is the empty body gain (kg/d) corrected for the gestational component. The k was determined as 0.347. The net protein requirements for gestation (NPgest) were determined as NPgest (g/d) = 0.0008722 × exp(0.01784 × GD) × (calfweight/35). The efficiency of using metabolizable protein for gestation (kgest) was 0.625. It is important to highlight that different methods of MP estimates should not be mixed and that the proposed method requires the estimate of microbial protein (estimate it via urinary estimates) and might be a limitation for practical application. In conclusion, new studies should be conducted to validate our results and the methodology adopted to determine protein requirements for pregnancy in dairy cows. Due to the pattern of protein accumulation in the gestational components, we suggest that exponential model to describe protein requirements for pregnancy for dairy cows.
650 $aGestation period
650 $aHolstein
650 $aPregnancy
650 $aBovino
650 $aGado Leiteiro
650 $aPeríodo de Gestação
650 $aProteína
650 $aVaca Leiteira
700 1 $aPROVAZZI, F. P.
700 1 $aSILVESTRE, T.
700 1 $aSILVA, A. L.
700 1 $aVALADARES FILHO, S. C.
700 1 $aCAMPOS, M. M.
700 1 $aMACHADO, F. S.
700 1 $aROTTA, P. P.
773 $tJournal of Dairy Science$gv. 106, p. 8821-8834, 2023.
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Embrapa Gado de Leite (CNPGL) |
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