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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
12/12/2012 |
Data da última atualização: |
10/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
DANES, M. A. C.; CHAGAS, L. J.; SANTOS, F. A. P.; PEDROSO, A. M. |
Afiliação: |
MARINA A. C. DANES, USP-ESALQ; LUCAS L. CHAGAS, USP-ESALQ; FLAVIO AUGUSTO PORTELA SANTOS, USP-ESALQ; ALEXANDRE MENDONCA PEDROSO, CPPSE. |
Título: |
Effect of protein supplementation on milk production and metabolism of dairy cows grazing tropical grass. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Journal of Dairy Science, v. 96, n. 1, p. 1-13, nov. 2012. |
DOI: |
10.3168/jds.2012-5607 |
Idioma: |
Português |
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 |
Palavras-Chave: |
Protein supplementation; Tropical pasture. |
Thesaurus Nal: |
nitrogen metabolism. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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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Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
28/08/2009 |
Data da última atualização: |
01/07/2019 |
Autoria: |
FRANCHINI, J. C.; DEBIASI, H.; FRANÇA, C.; CARRARA, R.; NEPOMUCENO, A. L.; FARIAS, J. R. |
Afiliação: |
JULIO CEZAR FRANCHINI DOS SANTOS, CNPSo; HENRIQUE DEBIASI, CNPSo; CRISTIANO FRANÇA, Estudante do Curso de Química da UNIFIL; RENATA CARRARA, Estudante do Curso de Química da UEL; ALEXANDRE LIMA NEPOMUCENO, CNPSo; JOSE RENATO BOUCAS FARIAS, CNPSo. |
Título: |
Desenvolvimento do sistema radicular da soja visando tolerância à seca. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 32., 2009, Fortaleza. O solo e a produção de bioenergia: perspectivas e desafios: resumos. [Viçosa, MG]: SBCS; Fortaleza: UFC, 2009. p. 393. Ref.: PT1874. |
Idioma: |
Português |
Palavras-Chave: |
Soybean; Tolerância à seca. |
Thesagro: |
Conservação da água; Conservação do solo; Deficiência hídrica; Glycine Max; Manejo do solo; Relação água-planta; Resistência a seca; Sistema Radicular; Soja. |
Thesaurus NAL: |
Drought tolerance; Plant physiology; Plant-water relations; Soil conservation; Soil management; Water stress. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01198naa a2200373 a 4500 001 1471143 005 2019-07-01 008 2009 bl --- 0-- u #d 100 1 $aFRANCHINI, J. C. 245 $aDesenvolvimento do sistema radicular da soja visando tolerância à seca. 260 $c2009 650 $aDrought tolerance 650 $aPlant physiology 650 $aPlant-water relations 650 $aSoil conservation 650 $aSoil management 650 $aWater stress 650 $aConservação da água 650 $aConservação do solo 650 $aDeficiência hídrica 650 $aGlycine Max 650 $aManejo do solo 650 $aRelação água-planta 650 $aResistência a seca 650 $aSistema Radicular 650 $aSoja 653 $aSoybean 653 $aTolerância à seca 700 1 $aDEBIASI, H. 700 1 $aFRANÇA, C. 700 1 $aCARRARA, R. 700 1 $aNEPOMUCENO, A. L. 700 1 $aFARIAS, J. R. 773 $tIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 32., 2009, Fortaleza. O solo e a produção de bioenergia: perspectivas e desafios: resumos. [Viçosa, MG]: SBCS; Fortaleza: UFC, 2009. p. 393. Ref.: PT1874.
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