| Registro completo |
| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture
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| Autores: |
Gutierrez, Gabriela Santistevan
Lana, Rogério de Paula
Teixeira, Cesar Roberto Viana
Rennó, Luciana Navajas
Veloso, Cristina Mattos
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| Data: |
2018-10-01
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| Ano: |
2018
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| Palavras-chave: |
Concentrate
Microbial growth
Ruminal fermentation
Supplementation.
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| Resumo: |
The objective this work was to evaluate the supplementation of cows on Brachiaria decumbens pasture during the rainy-dry transition. Eight 1/2 Holstein/Zebu cows (497 ± 50 kg) were distributed in two 4 x 4 Latin squares, with 2 x 2 factorial treatments (100% mineral salt versus nitrogen salt containing 25:25:50% urea: corn: mineral salt, and 1.5 versus 3.0 kg d-1 concentrate per cow). The experiment lasted 56 days, divided into four periods of 14 days, the last seven days for data collection. No interaction effect (p > 0.05) was detected between the supplement and the different levels of concentrate for any of the evaluated variables. No effect (p > 0.05) of supplement or concentrate level was observed on urinary excretions of purine derivatives, microbial nitrogen compounds and microbial efficiency. Nitrogen salt increased (p < 0.05) nitrogen intake and increased urinary nitrogen excretion, leading to a reduced nitrogen balance, while the higher concentrate level increased (p < 0.05) nitrogen intake and the total amount of nitrogen excreted in milk. Therefore, it is recommended, for crossbred cows in the rainy-dry transition period, the supply of 1.5 kg d-1 concentrate during milking, using only mineral salt instead of nitrogen salt at will on pasture.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42556
10.4025/actascianimsci.v40i1.42556
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42556/pdf
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e42556
Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e42556
1807-8672
1806-2636
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| Direitos: |
Direitos autorais 2018 Acta Scientiarum. Animal Sciences
http://creativecommons.org/licenses/by/4.0
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