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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
01/07/2013 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BALDIN, M.; GAMA, M. A. S. da; DRESCH, R.; HARVATINE, K. J.; OLIVEIRA, D. E. |
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Afiliação: |
M. BALDIN, UESC; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; R. DRESCH, UESC; K. J. HARVATINE, PENNSYLVANIA STATE UNIVERSITY; D. E. OLIVEIRA, UESC. |
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Título: |
A rumen unprotected conjugated linoleic acid supplement inhibits milk fat synthesis and improves energy balance in lactating goats. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 91, n. 7, p. 3305-3314, 2013. |
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DOI: |
https://doi.org/10.2527/jas.2012-5766 |
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Idioma: |
Inglês |
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Conteúdo: |
Feeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and PUFA (5.6 and 5.4%, respectively), and a pronounced increase (1576%) in milk fat trans-10, cis-12 CLA. Consistent with the high milk fat trans-10, cis-12 CLA content, all desaturase indexes were reduced in milk fat from CLA-fed goats. The MFD induced by CLA reduced the energy required for milk production by 22%, which was accompanied by an improvement in the estimated energy balance (P < 0.001), greater blood glucose concentration (P < 0.05), and a trend for increased BW (P = 0.08). Approximately 7.2% of trans-10, cis-12 CLA was estimated to escape from rumen biohydrogenation and indirect comparisons with data obtained from other studies suggest equivalent MFD between dietary CLA in the methyl ester form and rumen protected sources. Thus, despite the apparent low degree of rumen protection, our results suggest that methyl esters of CLA could be an alternative to rumen protected CLA supplements due to manufacturing and cost advantages. MenosFeeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and P... Mostrar Tudo |
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Palavras-Chave: |
Acido linoleico conjugado; Acidos graxos; Balanço energetico. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03177naa a2200217 a 4500
001 1961001
005 2024-02-09
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2527/jas.2012-5766$2DOI
100 1 $aBALDIN, M.
245 $aA rumen unprotected conjugated linoleic acid supplement inhibits milk fat synthesis and improves energy balance in lactating goats.$h[electronic resource]
260 $c2013
520 $aFeeding trans-10, cis-12 CLA supplements in a rumen-protected form has been shown to cause milk fat depression (MFD) in cows, ewes, and goats. Methyl esters of CLA were shown to be as effective as FFA in inducing MFD when infused postruminally, but their efficacy as a feed supplement has not been addressed in studies with lactating ruminants. In the present study, we investigated the effects of an unprotected trans-10, cis-12 CLA supplement as methyl esters on performance, milk composition, and energy status of dairy goats. Eighteen multiparous Toggenburg goats were randomly assigned to dietary treatments in a crossover experimental design (14 d treatment periods separated by a 7 d washout interval): 30 g/d of calcium salts of fatty acids (Control) or 30 g/d of a rumen unprotected CLA supplement containing 29.9% of trans-10, cis-12 CLA as methyl esters (CLA). Lipid supplements were mixed into a concentrate and fed individually to animals 3 times a day as a total mixed ration component. The DMI, milk yield, milk protein and lactose content and secretion, and somatic cell count were unaffected by CLA treatment. On the other hand, milk fat content and yield were reduced by 19.9 and 17.9% in CLA-fed goats. Reduced milk fat yield in CLA-fed goats was a consequence of a lower secretion of both preformed and de novo synthesized fatty acids. The CLA treatment also changed the milk fatty acid profile, which included a reduction in the concentration of SFA (2.5%), increased MUFA and PUFA (5.6 and 5.4%, respectively), and a pronounced increase (1576%) in milk fat trans-10, cis-12 CLA. Consistent with the high milk fat trans-10, cis-12 CLA content, all desaturase indexes were reduced in milk fat from CLA-fed goats. The MFD induced by CLA reduced the energy required for milk production by 22%, which was accompanied by an improvement in the estimated energy balance (P < 0.001), greater blood glucose concentration (P < 0.05), and a trend for increased BW (P = 0.08). Approximately 7.2% of trans-10, cis-12 CLA was estimated to escape from rumen biohydrogenation and indirect comparisons with data obtained from other studies suggest equivalent MFD between dietary CLA in the methyl ester form and rumen protected sources. Thus, despite the apparent low degree of rumen protection, our results suggest that methyl esters of CLA could be an alternative to rumen protected CLA supplements due to manufacturing and cost advantages.
653 $aAcido linoleico conjugado
653 $aAcidos graxos
653 $aBalanço energetico
700 1 $aGAMA, M. A. S. da
700 1 $aDRESCH, R.
700 1 $aHARVATINE, K. J.
700 1 $aOLIVEIRA, D. E.
773 $tJournal of Animal Science$gv. 91, n. 7, p. 3305-3314, 2013.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Registros recuperados : 174 | |
| 81. |  | PITTA, G. V. E.; COELHO, A. M.; ALVES, V. M. C.; FRANCA, G. E. de; MAGALHAES, J. V. de. Fertilidade de solos: calagem e gessagem. In: CRUZ, J. C.; VERSIANI, R. P.; FERREIRA, M. T. R. (Ed.). Cultivo do milho. Sete Lagoas: Embrapa Milho e Sorgo, 2000. (Embrapa Milho e Sorgo. Sistema de produção, 1).| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 84. | | FREIRE, F. M.; PITTA, G. V. E.; ALVES, V. M. C.; FRANCA, G. E. de; COELHO, A. M. Fertilidade de solos: interpretação de resultados de análise do solo. In: CRUZ, J. C.; VERSIANI, R. P.; FERREIRA, M. T. R. (Ed.). Cultivo do milho. Sete Lagoas: Embrapa Milho e Sorgo, 2000. (Embrapa Milho e Sorgo. Sistema de produção, 1).| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 87. | | COELHO, A. M.; FRANCA, G. E. de; PITTA, G. V. E.; ALVES, V. M. C.; HERNANI, L. C. Fertilidade de solos: nutrição e adubação do milho. In: CRUZ, J. C.; VERSIANI, R. P.; FERREIRA, M. T. R. (Ed.). Cultivo do milho. Sete Lagoas: Embrapa Milho e Sorgo, 2000. (Embrapa Milho e Sorgo. Sistema de produção, 1).| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 92. | | VASCONCELLOS, C. A.; SANTOS, H. L. dos; FRANCA, G. E. de; PITTA, G. V. E.; BAHIA FILHO, A. F. C. Eficiência agronômica de fosfatos naturais para a cultura do sorgo-granífero. II. Produção de grãos, eficiência relativa e fósforo disponível. Revista Brasileira de Ciência do Solo, Campinas, v. 10, p. 123-128, 1986.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 93. | | SCHAFFERT, R. E.; ALVES, V. M. C.; PITTA, G. V. E.; BAHIA, A. F. C.; SANTOS, F. G. Genetic variability in sorghum for P efficiency and responsiveness. In: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 72-73.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 95. | | ALVES, V. M. C.; OLIVEIRA-PAIVA, C. A.; PITTA, G. V. E.; SCHAFFERT, R. E.; MAGALHAES, J. V. de. Nova metodologia para seleção de genótipos de sorgo quanto a tolerância ao alumínio em solução nutritiva. In: CONGRESSO NACIONAL DE MILHO E SORGO, 25.; SIMPOSIO BRASILEIRO SOBRE A LAGARTA-DO-CARTUCHO, SPODOPTERA FRUGIPERDA, 1., 2004, Cuiabá, MT. Da agricultura familiar ao agronegócio: tecnologia, competitividade e sustentabilidade: [resumos expandidos]. Sete Lagoas: ABMS: Embrapa Milho e Sorgo; Cuiabá: Empaer, 2004. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 97. | | BRASIL, E. C.; ALVES, V. M. C.; MARRIEL, I. E.; PITTA, G. V. E.; CARVALHO, J. G. de. Matéria seca e acúmulo de nutrientes em genótipos de milho contrastantes quanto a aquisição de fósforo. Ciência e agrotecnologia, Lavras, v. 31, n. 3, p. 704-712, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Milho e Sorgo. |
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| Registros recuperados : 174 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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