| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
12/12/2012 |
|
Data da última atualização: |
19/06/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
OLIVEIRA, D. E.; GAMA, M. A. S. da; FERNANDES, D.; TEDESCHI, L. O.; BAUMAN, D. E. |
|
Afiliação: |
D. E. OLIVEIRA, UESC; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; D. FERNANDES, UESC; L. O. TEDESCHI, UNIVERSIDADE DO TEXAS; D. E. BAUMAN, CORNELL. |
|
Título: |
An unprotected conjugated linoleic acid supplement decreases milk production and secretion of milk components in grazing dairy ewes. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
Journal of Dairy Science, v. 95, n. 3, p. 1437-1446, 2012. |
|
DOI: |
https://doi.org/10.3168/jds.2011-4618 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Feeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 desaturase indexes by 25, 18.7, and 0.1%, respectively, but increased the cis-9,trans-11 CLA/trans-11 C18:1 ratio by 8.6%. The concentrations of trans-10,cis-12 CLA and cis-9,trans-11 CLA in milk fat was 309 and 33.4% higher in ewes fed CLA. Pronounced milk fat depression coupled with the deleterious effects on milk yield, milk SCC, and secretion of all milk solids observed in ewes fed an unprotected CLA supplement is likely to be associated with high doses of trans-10,cis-12 CLA reaching the mammary gland, corroborating previous results obtained with dairy cows. MenosFeeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 des... Mostrar Tudo |
|
Palavras-Chave: |
Depressão de gordura do leite; Ovelha lacaune; Produção de leite. |
|
Thesagro: |
Glândula Mamaria. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 02841naa a2200229 a 4500
001 1942248
005 2024-06-19
008 2012 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3168/jds.2011-4618$2DOI
100 1 $aOLIVEIRA, D. E.
245 $aAn unprotected conjugated linoleic acid supplement decreases milk production and secretion of milk components in grazing dairy ewes.$h[electronic resource]
260 $c2012
520 $aFeeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (<C16) was decreased by 25%, whereas the concentration of milk fatty acids taken up preformed from the plasma (>C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 desaturase indexes by 25, 18.7, and 0.1%, respectively, but increased the cis-9,trans-11 CLA/trans-11 C18:1 ratio by 8.6%. The concentrations of trans-10,cis-12 CLA and cis-9,trans-11 CLA in milk fat was 309 and 33.4% higher in ewes fed CLA. Pronounced milk fat depression coupled with the deleterious effects on milk yield, milk SCC, and secretion of all milk solids observed in ewes fed an unprotected CLA supplement is likely to be associated with high doses of trans-10,cis-12 CLA reaching the mammary gland, corroborating previous results obtained with dairy cows.
650 $aGlândula Mamaria
653 $aDepressão de gordura do leite
653 $aOvelha lacaune
653 $aProdução de leite
700 1 $aGAMA, M. A. S. da
700 1 $aFERNANDES, D.
700 1 $aTEDESCHI, L. O.
700 1 $aBAUMAN, D. E.
773 $tJournal of Dairy Science$gv. 95, n. 3, p. 1437-1446, 2012.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 5 | |
| 1. |  | SILVA, S. de M. da; PADOVAN, M. P.; DANIEL, O.; HEID, D. M.; PEREIRA, Z. V. Produção de alimentos em sistemas agroflorestais de base agroecológica no cerrado na Região Sul de Mato Grosso do Sul. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 8., 2011, Belém, PA. Sistemas agroflorestais na paisagem florestal: desafios científicos, tecnológicos e de políticas para integrar benefícios locais e globais: anais. Belém, PA: SBSAF: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
|    |
| 2. | | SALOMÃO, G. de B.; PADOVAN, M. P.; SILVA, F. M. da; FERNANDES, S. S. L.; MOITINHO, M. R.; SILVA, S. de M. da. Avaliação de espécies arbóreas e seu uso múltiplo em um sistema agroflorestal em Ponta Porã, MS. In: JORNADA DE INICIAÇÃO À PESQUISA DA EMBRAPA, 2012, Dourados. Resumos... Brasília, DF: Embrapa; Dourados: Embrapa Agropecuária Oeste, 2012. 1 CD-ROM; JIPE 2012.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| 3. | | SALOMÃO, G. de B.; FERNANDES, S. S. L.; PEREIRA, Z. V.; MOITINHO, M. R.; SILVA, S. de M. da; PADOVAN, M. P. Fitossociologia e desempenho de espécies arbóreas em um sistema agroflorestal sob bases agroecológicas em Dourados, Mato Grosso do Sul. In: SEMINÁRIO DE AGROECOLOGIA DE MATO GROSSO DO SUL, 4.; ENCONTRO DE PRODUTORES AGROECOLÓGICOS DE MS, 3., 2012, Glória de Dourados. O saber tradicional e o científico: a interação encurtando caminhos para o desenvolvimento sustentável: anais. Brasília, DF: Embrapa, 2012. 1 CD-ROM. Editado por: Leandro Fávio Carneiro, Milton Parron Padovan. Publicado também no Cadernos de Agroecologia, v. 7, n.2, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| 4. | | PADOVAN, M. P.; PEREIRA, Z. V.; FERNANDES, S. S. L.; SALOMÃO, G. de B.; LOBTCHENKO, G.; SILVA, S. de M. da. Performance e fitossociologia de espécies arbóreas em um sistema agroflorestal sob bases ecológicas na Região Sul de Mato Grosso do Sul. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 8., 2011, Belém, PA. Sistemas agroflorestais na paisagem florestal: desafios científicos, tecnológicos e de políticas para integrar benefícios locais e globais: anais. Belém, PA: SBSAF: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| 5. | | SALOMÃO, G. de B.; PADOVAN, M. P.; PEREIRA, Z. V.; FERNANDES, S. S. L.; MOITINHO, M. R.; SILVA, S. de M. da. Uso múltiplo de espécies arbóreas em um sistema agroflorestal sob bases agroecológicas em Ponta Porã, Mato Grosso do Sul. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 8., 2011, Belém, PA. Sistemas agroflorestais na paisagem florestal: desafios científicos, tecnológicos e de políticas para integrar benefícios locais e globais: anais. Belém, PA: SBSAF: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| Registros recuperados : 5 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
