Título

Effects of xylanase supplementation on feed intake, digestibility and ruminal fermentation in Rambouillet sheep

Autor

LAURA HAYDEE VALLEJO HERNANDEZ

Abdelfattah Zeidan Mohamed Salem

LUIS MIGUEL CAMACHO DIAZ

Ahmed E. Kholif

María Dolores Mariezcurrena Berasain

MOISES CIPRIANO SALAZAR

MARIA UXUA ALONSO FRESAN

Jaime Olivares Pérez

SECUNDINO LOPEZ PUENTE

Nivel de Acceso

Acceso Abierto

Resumen o descripción

The present study aimed to investigate the effects of adding xylanase enzyme (XY) to a basal diet containing 300 g maize stover and 700 g concentrate/kg dry matter (DM) on feed intake, ruminal fermentation, total tract and ruminal digestibility, as well as some blood parameters. Four male Rambouillet sheep (39 ± 1·8 kg body weight), with permanent rumen and duodenum cannulae were used in a 4 × 4 Latin square design. Sheep were fed a basal diet without xylanase addition (control, XY0), or with the addition of xylanase at 1 (XY1), 3 (XY3) or 6 (XY6) μl/g of diet DM for 84 days, with four 21-day experimental periods. Feed intake, digestibility and rumen fermentation parameterswere determined on days 16–21 in each experimental period, and the apparent ruminal neutral detergent fibre (NDF) digestibilitywas determined on days 16 and 17. Treatments XY1 and XY3 increased feed intake,whereas digestibility was increased with XY6. Ruminal NDF digestibility increased when sheep were fed diets treated with xylanase. Ruminal pH, ammonia-N and acetic acid increased with xylanase treated diets. Propionic acid concentration increasedwith diet XY1 at 3 h post-feeding, but after 9 h post-feeding its concentration decreased in the rumen of sheep fed xylanase treated diets. Xylanase had no effect on blood urea, phosphorus and triglycerides. Addition of xylanase at 6 μl/g DM in a diet containing 300 g maize stover and 700 g concentrate/kg DM and fed to Rambouillet sheep improved feed digestibility and ruminal fermentation without affecting blood parameters.

Editor

Cambridge University Press

Fecha de publicación

6 de abril de 2016

Tipo de publicación

Artículo

Fuente

1110–1117

Idioma

Inglés

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

151

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