Data/hora: 07/06/2024 08:03:06

Provedor de dados: | Acta Scientiarum: Animal Sciences
País: | Brazil
Título: | Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture
Autores: | Gutierrez, Gabriela Santistevan; Lana, Rogério de Paula; Teixeira, Cesar Roberto Viana; Rennó, Luciana Navajas; Veloso, Cristina Mattos.
Data: | 2018-10-01
Ano: | 2018
Palavras-chave: | Concentrate; Microbial growth; Ruminal fermentation; Supplementation.
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 &gt; 0.05) was detected between the supplement and the different levels of concentrate for any of the evaluated variables. No effect (p &gt; 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 &lt; 0.05) nitrogen intake and increased urinary nitrogen excretion, leading to a reduced nitrogen balance, while the higher concentrate level increased (p &lt; 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42556

10.4025/actascianimsci.v40i1.42556

Editor: | Editora da Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42556/pdf
Formato: | application/pdf

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

Fonte:

Direitos autorais 2018 Acta Scientiarum. Animal Sciences

http://creativecommons.org/licenses/by/4.0