Efecto de la sustitución de parte de la proteína de la dieta por urea, y de parte de la dieta por orujo de oliva, sobre la fermentación ruminal de terneros en cebo intensivo
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[1] Universidad de Zaragoza
Universidad de Zaragoza
Zaragoza, España
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- 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. 306-308
- Idioma: español
- Títulos paralelos:
- Effects of substitution of part of the diet’s protein by urea, and of part of the diet by olive cake, on rumen fermentation of intensively reared beef cattle
- Enlaces
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Resumen
Eight rumen-fistulated Friesian steers (480±9.3 kg and 324±8.5 days old) were used in a cross-over design with four treatments: a control compound feed based on barley as majority cereal (C), the same control with 20% crude protein (on a dry matter (DM) basis) substituted by urea (U), control with 10% DM substituted by second-extraction pitted and dehydrated olive cake (O10), and control with 20% DM substituted by the same olive cake (O20). Compound feeds were formulated to contribute 14.5-15% crude protein (CP), and were offered ad libitum. Barley straw was used as forage. Samples of rumen liquid were taken, after 15 days of adaptation to the diets, at 0 (just before), 4 and 8 hours after feeding. The pH, and concentrations of ammonia (NH3) and volatile fatty acids (VFA) were determined. No significant differences (P>0.05) between treatments appeared at any time. However, diet C produced lower proportions of acetic and isovaleric acids, and higher proportions of propionic and valeric acids (P<0.05), at eight hours post feeding, than diet U. This suggests the possible role of urea as modulator of the acidosis syndrome.
