Data/hora: 02/06/2024 11:48:52

Provedor de dados: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia
País: | Brazil
Título: | Intake, digestibility, ruminal parameters, and microbial protein synthesis in crossbred steers fed diets based on Brachiaria grass silage and sorghum silage
Autores: | Chizzotti,F.H.M.; Pereira,O.G.; Valadares Filho,S.C.; Chizzotti,M.L.; Leão,M.I.; Pereira,D.H.; Tedeschi,L.O.
Data: | 2009-12-01
Ano: | 2009
Palavras-chave: | Brachiaria brizantha; Microbial efficiency; Total digestible nutrients.
Resumo: | A trial was carried out with four Holstein x Nellore crossbred steers (225±22kg of BW) fitted with ruminal and abomasal cannulaes in a 4 x 4 Latin Square design to evaluate the intake and the total and partial apparent digestibilities of nutrients, ruminal parameters, and microbial synthesis. Diets consisted of 60% silage and 40% concentrate formulated to be isonitrogenous (12.5% of crude protein, dry matter basis). Treatments consisted of different proportions of Brachiaria brizantha grass silage and sorghum silage: 100:0; 67:33; 33:67, and 0:100%, respectively, on dry matter basis. The intake of dry matter, organic matter, crude protein, ether extract, non-fiber carbohydrates, and total digestible nutrients linearly increased (P&lt;0.01) as levels of sorghum silage increased. The total apparent digestibility of dry matter, organic matter, and neutral detergent fiber linearly increased with sorghum silage levels (P&lt;0.02). The highest ruminal NH3-N (13.63mg/dL) levels occurred at 2.94h post-feeding whereas the lowest ruminal pH (5.87) was measured at 5.21h post-feeding. Microbial efficiency was not affected (P&gt;0.05) by the treatments. The use of 67% of sorghum silage and 33% of grass silage increased intake and digestibility of nutrients without affecting ruminal pH, ruminal NH3-N, and microbial efficiency.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000600012
Editor: | Universidade Federal de Minas Gerais, Escola de Veterinária
Relação: | 10.1590/S0102-09352009000600012
Formato: | text/html
Fonte: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.61 n.6 2009
Fonte: | info:eu-repo/semantics/openAccess