ORIGINAL PAPER
Intraruminal administration of two doses of quebracho tannins to sheep: effect on rumen degradation and total tract digestibility, faecal recovery and toxicity
G. Hervás 1  
,   P. Frutos 1,   G. Ramos 1,   F. J. Giráldez 1,   A. R. Mantecón 1
 
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Estación Agrícola Experimental, Spanish Council for Scientifc Research (CSIC), Apdo. 788, 24080-León, Spain
CORRESPONDING AUTHOR
G. Hervás   

Estación Agrícola Experimental, Spanish Council for Scientifc Research (CSIC), Apdo. 788, 24080-León, Spain
Publication date: 2004-01-14
 
J. Anim. Feed Sci. 2004;13(1):111–120
 
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ABSTRACT
Nine rumen fistulated ewes fed lucerne hay were intra-ruminally dosed for a period of 51 days with 0 (Q0), 35 (Q1) and 70 (Q2) g of quebracho condensed tannin (CT) extract/kg feed daily. Lucerne hay in situ DM, N and NDF 24 h disappearance were significantly lower (P<0.05) in those sheep dosed with the highest level of quebracho extract (Q2) compared with the other two groups (Q0 and Q1). The rumen ammonia-N concentration was also lower in groups treated with quebracho. Neither of the doses affected in vivo DM, NDF or ADF digestibility. However, both reduced apparent CP digestibility (P<0.01). Faecal analyses showed a 30% recovery of the administered CT, regardless of the dose (P>0.10). There were no signs of intoxication by tannins in any of the treatments.
 
CITATIONS (4):
1.
Feeding quebracho tannins to sheep enhances rumen fermentative activity to degrade browse shrubs
H. Ammar, S. López, M. Kammoun, R. Bodas, F.J. Giráldez, J.S. González
Animal Feed Science and Technology
 
2.
Flavan-3-ols: Nature, occurrence and biological activity
Patricia M. Aron, James A. Kennedy
Molecular Nutrition & Food Research
 
3.
Effects of condensed tannins in wrapped silage bales of sainfoin (Onobrychis viciifolia) on in vivo and in situ digestion in sheep
K. Theodoridou, J. Aufrère, D. Andueza, A. Le Morvan, F. Picard, J. Pourrat, R. Baumont
animal
 
4.
Results of a screening programme to identify plants or plant extracts that inhibit ruminal protein degradation
N. Selje, E. Hoffmann, S. Muetzel, R. Ningrat, R. Wallace, K. Becker
British Journal of Nutrition
 
ISSN:1230-1388