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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
07/02/2013 |
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Data da última atualização: |
07/02/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALBERTINI, T. Z.; MEDEIROS, S. R. de; TORRES JUNIOR, R. A. de A.; ZOCHI, S. S.; OLTJEN, J. W.; STRATHE, A. B.; LANNA, D. P. D. |
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Afiliação: |
T. Z. Albertini, USP/ESALQ; SERGIO RAPOSO DE MEDEIROS, CNPGC; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; S. S. Zocchi, USP/ESALQ; J. W. Oltjen, UNIVERSITY OF CALIFORNIA; A. B. Strathe, UNIVERSITY OF CALIFORNIA; D. P. D. LANNA, USP/ESALQ. |
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Título: |
A methodological approach to estimate the lactation curve and net energy and protein requirements of beef cows using nonlinear mixed-effects modeling. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Journal of Animal Science, v.90, n.11, p.3867-3878, Nov. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate methods to predict the secretion of milk and net energy and protein requirements of beef cows (Bos indicus and B. taurus) after approximately 1 mo postpartum using nonlinear mixed-effect modeling (NLME). Twenty Caracu × Nellore (CN) and 10 Nellore (NL) cows were inseminated to Red Angus bulls, and 10 Angus × Nellore (AN) were bred to Canchim bulls. Cows were evaluated from just after calving (25 ± 11 d) to weaning (220 d). Milk yield was estimated by weighing calves before and after suckling (WSW) and by machine milking (MM) methods at 25, 52, 80, 109, 136, 164, 193, and 220 ± 11 d of lactation. Brody and simple linear equations were consecutively fi tted to the data and compared using information criteria. For the Brody equation, a NLME model was used to estimate all lactation profiles incorporating different sources of variation (calf sex and breed of cow, cow as a nested random effect, and within cow auto-correlation). The CV for the MM method (29%) was less than WSW (45%). Consequently, the WSW method was responsible for reducing the variance about 1.5 times among individuals, which minimized the ability to detect differences among cows. As a result, only milk yield MM data were used in the NLME models. The Brody equation provided the best fi t to this dataset, and inclusion of a continuous autoregressive process improved fi t (P < 0.01). Milk, energy and protein yield at the beginning of lactation were affected by cow genotype and calf sex (P < 0.001). The exponential decay of the lactation curves was affected only by genotype (P < 0.001). Angus × Nellore cows produced 15 and 48% more milk than CN and NL during the trial, respectively (P < 0.05). Caracu × Nellore cows produced 29% more milk than NL (P < 0.05). The net energy and net protein requirements for milk yield followed a similar ranking. Male calves stimulated their dams to produce 11.7, 11.4, and 11.9% more milk, energy and protein, respectively (P < 0.05). The MM method is better than the WSW technique to detect genetic or environmental differences in milk yield among beef cows. The data obtained by the MM method and analyzed by NLME models allows the inclusion of fi xed effects, random effects and an autoregressive process in lactation equations to describe lactation curves and net energy and protein requirements. The NLME is a powerful tool to describe differences in the secretion of milk due to heterosis and cell mammary external stimulus in beef cows. MenosThe objective of this study was to evaluate methods to predict the secretion of milk and net energy and protein requirements of beef cows (Bos indicus and B. taurus) after approximately 1 mo postpartum using nonlinear mixed-effect modeling (NLME). Twenty Caracu × Nellore (CN) and 10 Nellore (NL) cows were inseminated to Red Angus bulls, and 10 Angus × Nellore (AN) were bred to Canchim bulls. Cows were evaluated from just after calving (25 ± 11 d) to weaning (220 d). Milk yield was estimated by weighing calves before and after suckling (WSW) and by machine milking (MM) methods at 25, 52, 80, 109, 136, 164, 193, and 220 ± 11 d of lactation. Brody and simple linear equations were consecutively fi tted to the data and compared using information criteria. For the Brody equation, a NLME model was used to estimate all lactation profiles incorporating different sources of variation (calf sex and breed of cow, cow as a nested random effect, and within cow auto-correlation). The CV for the MM method (29%) was less than WSW (45%). Consequently, the WSW method was responsible for reducing the variance about 1.5 times among individuals, which minimized the ability to detect differences among cows. As a result, only milk yield MM data were used in the NLME models. The Brody equation provided the best fi t to this dataset, and inclusion of a continuous autoregressive process improved fi t (P < 0.01). Milk, energy and protein yield at the beginning of lactation were affected by cow genotype... Mostrar Tudo |
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Palavras-Chave: |
Bovino de corte; Desempenho animal. |
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Thesagro: |
Curva de Lactação; Nutrição Animal; Vaca. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03344naa a2200253 a 4500
001 1948644
005 2013-02-07
008 2012 bl uuuu u00u1 u #d
100 1 $aALBERTINI, T. Z.
245 $aA methodological approach to estimate the lactation curve and net energy and protein requirements of beef cows using nonlinear mixed-effects modeling.$h[electronic resource]
260 $c2012
520 $aThe objective of this study was to evaluate methods to predict the secretion of milk and net energy and protein requirements of beef cows (Bos indicus and B. taurus) after approximately 1 mo postpartum using nonlinear mixed-effect modeling (NLME). Twenty Caracu × Nellore (CN) and 10 Nellore (NL) cows were inseminated to Red Angus bulls, and 10 Angus × Nellore (AN) were bred to Canchim bulls. Cows were evaluated from just after calving (25 ± 11 d) to weaning (220 d). Milk yield was estimated by weighing calves before and after suckling (WSW) and by machine milking (MM) methods at 25, 52, 80, 109, 136, 164, 193, and 220 ± 11 d of lactation. Brody and simple linear equations were consecutively fi tted to the data and compared using information criteria. For the Brody equation, a NLME model was used to estimate all lactation profiles incorporating different sources of variation (calf sex and breed of cow, cow as a nested random effect, and within cow auto-correlation). The CV for the MM method (29%) was less than WSW (45%). Consequently, the WSW method was responsible for reducing the variance about 1.5 times among individuals, which minimized the ability to detect differences among cows. As a result, only milk yield MM data were used in the NLME models. The Brody equation provided the best fi t to this dataset, and inclusion of a continuous autoregressive process improved fi t (P < 0.01). Milk, energy and protein yield at the beginning of lactation were affected by cow genotype and calf sex (P < 0.001). The exponential decay of the lactation curves was affected only by genotype (P < 0.001). Angus × Nellore cows produced 15 and 48% more milk than CN and NL during the trial, respectively (P < 0.05). Caracu × Nellore cows produced 29% more milk than NL (P < 0.05). The net energy and net protein requirements for milk yield followed a similar ranking. Male calves stimulated their dams to produce 11.7, 11.4, and 11.9% more milk, energy and protein, respectively (P < 0.05). The MM method is better than the WSW technique to detect genetic or environmental differences in milk yield among beef cows. The data obtained by the MM method and analyzed by NLME models allows the inclusion of fi xed effects, random effects and an autoregressive process in lactation equations to describe lactation curves and net energy and protein requirements. The NLME is a powerful tool to describe differences in the secretion of milk due to heterosis and cell mammary external stimulus in beef cows.
650 $aCurva de Lactação
650 $aNutrição Animal
650 $aVaca
653 $aBovino de corte
653 $aDesempenho animal
700 1 $aMEDEIROS, S. R. de
700 1 $aTORRES JUNIOR, R. A. de A.
700 1 $aZOCHI, S. S.
700 1 $aOLTJEN, J. W.
700 1 $aSTRATHE, A. B.
700 1 $aLANNA, D. P. D.
773 $tJournal of Animal Science$gv.90, n.11, p.3867-3878, Nov. 2012.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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| Registros recuperados : 13 | |
| 5. |  | FARIA, C. M. B. de; SOARES, J. M.; COSTA, N. D.; FARIA, A. F. Efeito de adubos verdes associados a correções do solo no melão irrigado. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 25.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 9.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 7.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 4., 2002, Rio de Janeiro. Resumos... Rio de Janeiro: SBCS; SBM; UFRRJ; Embrapa Agrobiologia; Embrapa Solos, 2002. p. 121. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 6. | | FARIA, A. F. de; HASEGAWA, P. N.; CHAGAS, E.; PIO, R.; PURGATTO, E.; MERCADANTE, A. Z. Cultivar influence on carotenoid composition of loquats from Brazil. Journal of food composition and analysis, v. 22, n. 3, p. 196-203, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Roraima. |
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| 7. | | FARIA, A. F. de; SCHULMAN, P.; MEYER, M. C.; CRUZ-MAGALHÃES, V.; MEDEIROS, F. H. V. Sete anos de eficácia de produtos de biocontrole de mofo branco na germinação carpogênica de Sclerotinia sclerotiorum no Brasil: uma metanálise. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 53., 2023, Brasília, DF. Anais... Brasília, DF: SBF, 2023. resumo. p. 221. Título em inglês: Seven years of white mold biocontrol product's performance efficacy on Sclerotinia sclerotiorum carpogenic germination in Brazil: a meta-analysis.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 8. | | SILVA, M. A. da; CHAVES, L. H. G.; SILVA, D. J.; FARIA, A. F. Produtividade e qualidade do melão em função de nitrogênio, micronutrientes e matéria orgânica. Agropecuária Técnica, Areia, v. 24, n. 2, p. 131-138, 2003.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Semiárido. |
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| 9. | | OLIVEIRA, F. A. de; CASTRO, C. de; BORKERT, C. M.; SFREDO, G. J.; OLIVEIRA JÚNIOR, A. de; FARIA, A. F. Adubação da soja com macro e micronutrientes e manejo da fertilidade do solo em rotação de culturas em solos do Brasil (04.2000.326-04). In: HOFFMANN-CAMPO, C. B.; SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2002: solos. Londrina: Embrapa Soja, 2003. p. 27-34. (Embrapa Soja. Documentos, 215).| Biblioteca(s): Embrapa Soja. |
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| 10. | | FONTES, R. L. F.; FERREIRA, G. B.; VENEGAS, V. H. A.; NEVES, J. C. L.; FARIA, A. F. de; FONTES, M. P. F. Bioavailability of soil Cu, Fe, Mn and Zn from soil fractions. Semina: Ciências Agrárias, v. 42, n. 1, p. 19-42, jan./fev. 2021.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Algodão. |
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| 11. | | HASEGAWA, P. N.; FARIA, A. F. de; MERCADANTE, A. Z.; CHAGAS, E. A.; PIO, R.; LAJOLO, F. M.; CORDENUNSI, B. R.; PURGATTO, E. Chemical composition of five loquat cultivars planted in Brazil. Ciência e tecnologia de alimentos, Campinas, v.30, n.2, p.552-559, abr.-jun., 2010| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Roraima. |
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| 12. | | DOMINGOS, D. F.; FARIA, A. F. de; GALAVERNA, R. S.; EBERLIN, M. N.; GREENFIELD, P.; ZUCCHI, T. D.; MELO, I. S. de; TRAN-DINH, N.; MIDGLEY, D.; OLIVEIRA, V. M. Genomic and chemical insights into biosurfactant production by the mangrove-derived strain Bacillus safensis CCMA-560. Applied Microbiology and Biotechnology, Heidelberg, v. 99, n. 7, p. 3155-3167, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 13. | | FARIA, A. F. de; SCHULMAN, P.; MEYER, M. C.; CAMPOS, H. D.; CRUZ-MAGALHÃES, V.; GODOY, C. V.; GUIMARÃES, R. A.; SILVA, L. H. C. P. da; GOUSSAIN, M. M.; MARTINS M. C.; NUNES JUNIOR, J.; VENANCIO, W. S.; FANTIN, L.; BRUSTOLIN, R.; JACCOUD FILHO, D. de S.; CARNEIRO, L. C.; JULIATTI, F. C.; MEDEIROS, F. H. V. Seven years of white mold biocontrol product's performance efficacy on Sclerotinia sclerotiorum carpogenic germination in Brazil: A meta-analysis. Biological Control, v. 176, 105080, 2022. 8 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 13 | |
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