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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
12/12/2012 |
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Data da última atualização: |
10/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DANES, M. A. C.; CHAGAS, L. J.; SANTOS, F. A. P.; PEDROSO, A. M. |
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Afiliação: |
MARINA A. C. DANES, USP-ESALQ; LUCAS L. CHAGAS, USP-ESALQ; FLAVIO AUGUSTO PORTELA SANTOS, USP-ESALQ; ALEXANDRE MENDONCA PEDROSO, CPPSE. |
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Título: |
Effect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 96, n. 1, p. 1-13, nov. 2012. |
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DOI: |
10.3168/jds.2012-5607 |
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Idioma: |
Português |
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Conteúdo: |
The objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same treatments described as well as a fourth treatment with 13.4% CP in the concentrate, in which urea replaced SSBM as the main N source. Ruminal volatile fatty acid concentration and microbial synthesis were not affected by levels or sources of N in the concentrate. Ruminal NH3N content increased as the concentrate CP content increased. Inclusion of SSBM in the concentrate did not increase production and decreased the ENU of midlactation dairy cows grazing on tropical forage. Supplementation of an 8.7% CP concentrate, resulting in a diet with CP levels between 15.3 and 15.7% of dry matter, was sufficient to meet the protein requirements of such milk production, with the highest ENU (18.4%). MenosThe objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same... Mostrar Tudo |
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Palavras-Chave: |
Protein supplementation; Tropical pasture. |
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Thesaurus Nal: |
nitrogen metabolism. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02857naa a2200205 a 4500
001 1942179
005 2023-03-10
008 2012 bl uuuu u00u1 u #d
024 7 $a10.3168/jds.2012-5607$2DOI
100 1 $aDANES, M. A. C.
245 $aEffect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass.$h[electronic resource]
260 $c2012
520 $aThe objectives of this study were to determine if midlactation dairy cows (Bos taurus L.) grazing intensively managed elephantgrass would have their protein requirement met exclusively with the pasture and an energy concentrate, making the use of protein ingredients unnecessary, as well as to determine the dietary crude protein (CP) content that would optimize the efficiency of N utilization (ENU). Thirty-three Holstein and crossbred (Holstein × Jersey) midlactation dairy cows, producing approximately 20 kg/d, were grouped within breed into 11 blocks according to milk yield and days in milk. Within blocks, cows were randomly assigned to 1 of 3 treatments and remained in the study for 11 wk. The control treatment contained only finely ground corn, minerals, and vitamins, and it was formulated to be 8.7% CP. Two higher levels of CP (formulated to be 13.4 and 18.1%) were achieved by replacing corn with solvent-extracted soybean meal (SSBM). Pasture was fertilized with 50 kg of N/ha after each grazing cycle and averaged 18.5% CP (dry matter basis). No differences were observed in milk yield or milk fat, protein, and casein content or casein yield. In addition, pasture intake was not different among treatments. Milk urea N increased linearly as the concentrate CP content increased. Cows fed the 8.7% CP concentrate had higher ENU. In another experiment, 4 ruminally cannulated Holstein dry cows were used in a metabolism trial designed in a 4 × 4 Latin square. Cows were fed the same treatments described as well as a fourth treatment with 13.4% CP in the concentrate, in which urea replaced SSBM as the main N source. Ruminal volatile fatty acid concentration and microbial synthesis were not affected by levels or sources of N in the concentrate. Ruminal NH3N content increased as the concentrate CP content increased. Inclusion of SSBM in the concentrate did not increase production and decreased the ENU of midlactation dairy cows grazing on tropical forage. Supplementation of an 8.7% CP concentrate, resulting in a diet with CP levels between 15.3 and 15.7% of dry matter, was sufficient to meet the protein requirements of such milk production, with the highest ENU (18.4%).
650 $anitrogen metabolism
653 $aProtein supplementation
653 $aTropical pasture
700 1 $aCHAGAS, L. J.
700 1 $aSANTOS, F. A. P.
700 1 $aPEDROSO, A. M.
773 $tJournal of Dairy Science$gv. 96, n. 1, p. 1-13, nov. 2012.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
30/01/2020 |
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Data da última atualização: |
02/08/2022 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
PORFIRIO-DA-SILVA, V.; TRICHES, G. P.; UTIMA, A. Y.; FRANCO, C. A. C.; KRUCHELSKI, S. |
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Afiliação: |
VANDERLEY PORFIRIO DA SILVA, CNPF; GILMAR PAULINHO TRICHES, Instituto Federal Catarinense; ALINE YABUSAME UTIMA, ARAUCO; CARLOS ALBERTO CAVICHIOLO FRANCO, UFPR; SILVANO KRUCHELSKI, UFPR. |
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Título: |
Componente arbóreo nos sistemas integrados de produção agropecuária em área de proteção ambiental. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: DOMINSCHEK, R.; KRUCHELSKI, S.; DEISS, L.; PORTUGAL, T. B.; DENARDIN, L. G.; MARTINS, A. P.; LANG, C. R.; ANIBAL DE MORAES, A. de (Ed.).Sistemas integrados de produção agropecuária na promoção da intensificação sustentável: boletim técnico do núcleo de inovação tecnológica em agropecuária. 2018. |
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Páginas: |
p. 47-58. |
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Idioma: |
Português |
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Conteúdo: |
A integração intencional de árvores com lavouras e, ou, pastagens com animais tem sido reconhecida como potencial forma de uso das terras para a obtenção de melhorias sociais, econômicas, produtivas e de sustentabilidade ambiental dos sistemas de produção. Esta integração de componentes configura um dos grandes tipos de SIPA, e contribui para um novo tipo de agricultura sustentável e intensificada com base em agricultura conservacionista |
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Palavras-Chave: |
ILPF. |
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Thesagro: |
Eucalipto; Madeira; Produtividade. |
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Thesaurus NAL: |
Eucalyptus benthamii. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/209907/1/2018-CAP-V.Porfirio-Boletim-NITA-Cap4.pdf
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Marc: |
LEADER 01414naa a2200241 a 4500
001 2119588
005 2022-08-02
008 2018 bl uuuu u00u1 u #d
100 1 $aPORFIRIO-DA-SILVA, V.
245 $aComponente arbóreo nos sistemas integrados de produção agropecuária em área de proteção ambiental.$h[electronic resource]
260 $c2018
300 $ap. 47-58.
520 $aA integração intencional de árvores com lavouras e, ou, pastagens com animais tem sido reconhecida como potencial forma de uso das terras para a obtenção de melhorias sociais, econômicas, produtivas e de sustentabilidade ambiental dos sistemas de produção. Esta integração de componentes configura um dos grandes tipos de SIPA, e contribui para um novo tipo de agricultura sustentável e intensificada com base em agricultura conservacionista
650 $aEucalyptus benthamii
650 $aEucalipto
650 $aMadeira
650 $aProdutividade
653 $aILPF
700 1 $aTRICHES, G. P.
700 1 $aUTIMA, A. Y.
700 1 $aFRANCO, C. A. C.
700 1 $aKRUCHELSKI, S.
773 $tIn: DOMINSCHEK, R.; KRUCHELSKI, S.; DEISS, L.; PORTUGAL, T. B.; DENARDIN, L. G.; MARTINS, A. P.; LANG, C. R.; ANIBAL DE MORAES, A. de (Ed.).Sistemas integrados de produção agropecuária na promoção da intensificação sustentável: boletim técnico do núcleo de inovação tecnológica em agropecuária. 2018.
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