Memorias de investigación
Artículos en revistas:
Effects of the ruminal comminution rate and microbial contamination of particles on accuracy of in situ estimates of ruminal degradability and intestinal digestibility of feedstuffs
Año:2013
Áreas de investigación
  • Alimentación animal
Datos
Descripción
Effects of considering the comminution rate (kc) and the correction of microbial contamination (using 15N techniques) of particles in the rumen on estimates of ruminally undegraded fractions and their intestinal digestibility were examined generating composite samples (from rumen-incubated residues) representative of the undegraded feed rumen outflow. The study used sunflower meal (SFM) and Italian ryegrass hay (RGH) and three rumen and duodenum cannulated wethers fed with a 40:60 RGH to concentrate diet (75 g DM/kgBW0.75). Transit studies up to the duodenum with Yb-SFM and Eu-RGH marked samples showed higher kc values (/h) in SFM than in RGH (0.577 vs. 0.0892, p = 0.034), whereas similar values occurred for the rumen passage rate (kp). Estimates of ruminally undegraded and intestinal digestibility of all tested fractions decreased when kc was considered and also applying microbial correction. Thus, microbial uncorrected kp-based proportions of intestinal digested undegraded crude protein overestimated those corrected and kc)kp-based by 39% in SFM (0.146 vs. 0.105) and 761% in RGH (0.373 vs. 0.0433). Results show that both kc and microbial contamination correction should be considered to obtain accurate in situ estimates in grasses, whereas in protein concentrates not considering kc is an important source of error.
Internacional
Si
JCR del ISI
Si
Título de la revista
Journal of Animal Physiology And Animal Nutrition
ISSN
0931-2439
Factor de impacto JCR
1,106
Información de impacto
Datos JCR del año 2010
Volumen
97
DOI
10.1111/j.1439-0396.2011.01248.x
Número de revista
Desde la página
109
Hasta la página
118
Mes
SIN MES
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  • Creador: Grupo de Investigación: Producción Animal