Efecto del tipo de ración sobre los niveles de ingestión, digestibilidad y síntesis de proteína microbiana en terneras sujetas a un sistema de cebo intensivo

• J. Mora ^[1] ; P. Olivia ^[1] ; X. Cortés ^[1] ; H. mOZARÁN ^[1] ; A.R. Seradj ^[1] ; D. Villalba ^[1] ; J. Balcells ^[1]
  1. [1] ETSEA
• Localización: XV Jornadas sobre Producción Animal: 14 y 15 de mayo de 2013, Zaragoza / Jorge Hugo Calvo Lacosta (aut.), Isabel Casasús Pueyo (aut.), Margalida Joy Torrens (aut.), Javier Álvarez Rodríguez (aut.), Luis Varona Aguado (aut.), Begoña Panea Doblado (aut.), Carlos Calvete Margolles (aut.), Joaquim Barcells Teres (aut.), Vol. 1, 2013, ISBN 978-84-695-7684-7, págs. 264-266
• Idioma: español
• Títulos paralelos:
  • Effect of ration on intakes, digestibility and microbial protein synthesis in heifers subjected to intensive feeding system
• Enlaces
  • Texto Completo Libro  1 (pdf)   2 (pdf) 
• Resumen

  • Twelve crossbred heifers (362 Kg LW; 12-13 month age) were distributed in two feeding groups. Animals were feed ad libitum in an intensive commercial system two experimental rations composed by concentrate plus straw (PP: cereal 0.64 and protein meals 0.26) and a total mixed ratio (RCM, ray grass 0.30 sunflower 0.28 and immature corncob silage “pastone” 0.42). Animals receive the experimental ration during all the fattening period (120 days) until they reach the breed/sex-target slaughtering weight. The last ten days of the feeding trial intake, digestibility and microbial production were determined using two flow (Ytterbium Acetate and Lignin sulphuric) and microbial (15N and puirine bases) markers. Digesta was sampled during the heifers sacrifice in the slaughter house. Heifers feed RCM ate more, DM was better digested on that group MN flow and efficiency was also improved significantly by roughage.