Observatorio de I+D+i UPM

Memorias de investigación
Artículos en revistas:
Effects of feed intake on in situ rumen microbial contamination and degradation of feeds
Año:2008
Áreas de investigación
  • Producción animal
Datos
Descripción
An in situ study was conducted using four rumen cannulated wethers and five feeds (corn grain (CG), soybean meal (SBM), sunflower meal (SFM), vetch-oat hay (VH), and lentil straw (LS)) to determine (using 15N infusion techniques) the effects of two intake levels (40 and 80 g DM/kg W0.75) on the microbial contamination and rumen degradation of DM or CP. Degradation studies were also performed for neutral and acid detergent fibres (NDF and ADF, respectively) of VH. In most cases, the evolution with time of the microbial DM adhered to particles fitted well to exponential curves, which diverged between both levels of intake due to the lower values attained at high intake. However, as a consequence of the large and progressive increase of the variability of microbial contamination, statistical evidence is only partial. This behaviour was less evident for CP contamination, especially in forages. The lack of these corrections underestimated (P < 0.001) the effective degradability (ED) of all tested fractions, with important differences between feeds. The intake level had not relevant effects on the distribution of soluble, insoluble available and unavailable fractions of DM or CP (or fibres in VH), but determined some changes in their degradation rates (kd). Direct relations between these last values and rumen outflow rates (kp) were shown in some feeds for the degradation of CP and also of DM in concentrates, whereas negative relations were shown for the degradation rates of DM in forages (or NDF and ADF of VH). All ED estimates decreased with the intake rise, but for CP this effect (P<0.05) was only detected in SBM and VH and, as tendency (P = 0.079), in SFM. These decreases represent 40.8 (CG), 80.8 (SBM), 62.1 (SFM), 66.8 (VH), and 19.5% (LS) than those estimated considering only kp changes, which shows the interest to consider conjointly the variations of both rates to study the effect of diet changes on ED.
Internacional
Si
JCR del ISI
Si
Título de la revista
Livestock Science
ISSN
1871-1413
Factor de impacto JCR
0,61
Información de impacto
Volumen
116
DOI
Número de revista
116
Desde la página
108
Hasta la página
117
Mes
ENERO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Carlos Alberto Rodriguez Cortes (UPM)
  • Autor: Javier Gonzalez Cano (UPM)
  • Autor: Maria Remedios Alvir Morencos (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Producción Animal
  • Departamento: Producción Animal
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