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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
07/03/2013 |
Data da última atualização: |
07/03/2013 |
Autoria: |
GOMES, R. da C.; SAINZ, R. D.; LEME, P. R. |
Afiliação: |
RODRIGO DA COSTA GOMES, CNPGC; Roberto Daniel Sainz, Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo.; Paulo Roberto Leme, Department of Animal Science, University of California. |
Título: |
Protein metabolism, feed energy partitioning, behavior patterns and plasma cortisol in Nellore steers with high and low residual feed intake. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v.42, n.1, p.44-50, 2013. |
Idioma: |
Inglês |
Conteúdo: |
The objective was to evaluate protein turnover, nitrogen balance, feed energy partitioning, behavior patterns and plasma cortisol in Nellore (B. indicus) cattle with high and low residual feed intake (RFI = actual minus expected dry matter intake). Seventy-two Nellore steers (16 to 21 months-old, 334±19 kg initial body weight) were fed a feedlot diet for 70 days ad libitum. Daily dry matter intake (DMI) and average daily gain (ADG) were recorded individually and RFI was calculated. The 12 steers of lowest (Low-RFI, most efficient) RFI and the 12 ones of highest RFI (High-RFI, least efficient) were evaluated with respect to their behavior patterns and plasma cortisol concentration. Urine was collected for determination of daily 3-methylhistidine excretion (3MH) and myofibrillar protein breakdown rates. Urinary, gaseous and fecal energy losses were determined as well as the N retention and excretion. High-RFI steers tended to have shorter lying and idle periods and greater feeding time and plasma cortisol levels than low-RFI cattle. No RFI effects were seen for urine 3MH excretion and for rates of protein degradation and synthesis. No effects of efficiency class were observed for N excretion or N retention. No RFI effects were observed for dry matter digestibility, digestible energy (DE) and metabolizable energy (ME) content and DE/ME ratio. Methane energy losses were lower for low- compared with high-RFI steers. Protein turnover seems not to affect feed efficiency in Nellore steers. Improved RFI in Nellore steers is probably associated with lower degrees of activity and responsiveness to stress and lower losses of dietary energy as methane. MenosThe objective was to evaluate protein turnover, nitrogen balance, feed energy partitioning, behavior patterns and plasma cortisol in Nellore (B. indicus) cattle with high and low residual feed intake (RFI = actual minus expected dry matter intake). Seventy-two Nellore steers (16 to 21 months-old, 334±19 kg initial body weight) were fed a feedlot diet for 70 days ad libitum. Daily dry matter intake (DMI) and average daily gain (ADG) were recorded individually and RFI was calculated. The 12 steers of lowest (Low-RFI, most efficient) RFI and the 12 ones of highest RFI (High-RFI, least efficient) were evaluated with respect to their behavior patterns and plasma cortisol concentration. Urine was collected for determination of daily 3-methylhistidine excretion (3MH) and myofibrillar protein breakdown rates. Urinary, gaseous and fecal energy losses were determined as well as the N retention and excretion. High-RFI steers tended to have shorter lying and idle periods and greater feeding time and plasma cortisol levels than low-RFI cattle. No RFI effects were seen for urine 3MH excretion and for rates of protein degradation and synthesis. No effects of efficiency class were observed for N excretion or N retention. No RFI effects were observed for dry matter digestibility, digestible energy (DE) and metabolizable energy (ME) content and DE/ME ratio. Methane energy losses were lower for low- compared with high-RFI steers. Protein turnover seems not to affect feed efficiency in Nellore ... Mostrar Tudo |
Palavras-Chave: |
Bovino de corte. |
Thesagro: |
Nutrição Animal. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/78369/1/0000007017-Gomes-et-al-2013-RBZ.pdf
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Marc: |
LEADER 02239naa a2200169 a 4500 001 1952472 005 2013-03-07 008 2013 bl uuuu u00u1 u #d 100 1 $aGOMES, R. da C. 245 $aProtein metabolism, feed energy partitioning, behavior patterns and plasma cortisol in Nellore steers with high and low residual feed intake.$h[electronic resource] 260 $c2013 520 $aThe objective was to evaluate protein turnover, nitrogen balance, feed energy partitioning, behavior patterns and plasma cortisol in Nellore (B. indicus) cattle with high and low residual feed intake (RFI = actual minus expected dry matter intake). Seventy-two Nellore steers (16 to 21 months-old, 334±19 kg initial body weight) were fed a feedlot diet for 70 days ad libitum. Daily dry matter intake (DMI) and average daily gain (ADG) were recorded individually and RFI was calculated. The 12 steers of lowest (Low-RFI, most efficient) RFI and the 12 ones of highest RFI (High-RFI, least efficient) were evaluated with respect to their behavior patterns and plasma cortisol concentration. Urine was collected for determination of daily 3-methylhistidine excretion (3MH) and myofibrillar protein breakdown rates. Urinary, gaseous and fecal energy losses were determined as well as the N retention and excretion. High-RFI steers tended to have shorter lying and idle periods and greater feeding time and plasma cortisol levels than low-RFI cattle. No RFI effects were seen for urine 3MH excretion and for rates of protein degradation and synthesis. No effects of efficiency class were observed for N excretion or N retention. No RFI effects were observed for dry matter digestibility, digestible energy (DE) and metabolizable energy (ME) content and DE/ME ratio. Methane energy losses were lower for low- compared with high-RFI steers. Protein turnover seems not to affect feed efficiency in Nellore steers. Improved RFI in Nellore steers is probably associated with lower degrees of activity and responsiveness to stress and lower losses of dietary energy as methane. 650 $aNutrição Animal 653 $aBovino de corte 700 1 $aSAINZ, R. D. 700 1 $aLEME, P. R. 773 $tRevista Brasileira de Zootecnia$gv.42, n.1, p.44-50, 2013.
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Embrapa Gado de Corte (CNPGC) |
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1. | | ANDREOTE, F. D.; TEIXEIRA, M. A.; DIAS, A. C. F.; VIEIRA, R. F. Análise da diversidade de proteobactérias e actinobactérias em solos cultivados com morango sob diferentes práticas de manejo. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 28.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 12.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 10.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 7., 2008, Londrina. FertBio 2008: desafios para o uso do solo com eficiência e qualidade ambiental: resumos. Londrina: Embrapa Soja: SBCS: IAPAR, UEL, 2008. 1 CD-ROM.Tipo: Resumo em Anais de Congresso |
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2. | | SANTOS, T. T.; KOENIGKAN, L. V.; BARBEDO, J. G. A.; RODRIGUES, G. C. 3D plant modeling: localization, mapping and segmentation for plant phenotyping using a single hand-held camera. In: EUROPEAN CONFERENCE ON COMPUTER VISION, 13., 2014, Zurich. Computer Vision: ECCV 2014: proceedings. Switzerland: Springer, 2015. p. 247-263. (Lecture notes in computer science, v. 8928). Part IV. Editores: Lourdes Agapito, Michael M. Bronstein, Carsten Rother.Tipo: Artigo em Anais de Congresso |
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10. | | SANTOS, S. A.; COSTA, C.; CHALITA, L. V. A. S.; POTT, A.; ALVAREZ, J. M.; ORTIZ, A. G. Grazing behavior and activity patterns by free-grazing cattle in the Pantanal region. In: INTERNATIONAL GRASSLAND CONGRESS, 19., Sao Pedro, 2001. Proceedings. Sao Pedro: Sociedade Brasileira de Zootecnica, 2001. p.297-298.Biblioteca(s): Embrapa Pantanal. |
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18. | | CARNEIRO, K. L. B.; RIBEIRO, R. C.; FREITAS, A. S.; ARAUJO, I. M. da S.; GARRUTI, D. dos S.; OSTER, A. H. Sensory stability of yellow melon coated with edible films of Biopolymer and essential oils. In: SIMPÓSIO LATINO AMERICANO DE CIÊNCIA DE ALIMENTOS, 13., 2019, Campinas, SP. Anais...Campinas: SLACA, 10 a 12 nov. 2019. Resumo 113051.Tipo: Artigo em Anais de Congresso |
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Registros recuperados : 21 | |
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