TY - JOUR JO - Journal of Animal and Feed Sciences J2 - J. Anim. Feed Sci. SN - 1230-1388 VL - 13 IS - 1 PY - 2004 ID - Hervás2004 TI - Intraruminal administration of two doses of quebracho tannins to sheep: effect on rumen degradation and total tract digestibility, faecal recovery and toxicity AB - Nine rumen fistulated ewes fed lucerne hay were intra-ruminally dosed for a period of 51 days with 0 (Q 0 ), 35 (Q 1 ) and 70 (Q 2 ) 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 (Q 2 ) compared with the other two groups (Q 0 and Q 1 ). 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 0.10). There were no signs of intoxication by tannins in any of the treatments. AU - Hervás, G. AU - Frutos, P. AU - Ramos, G. AU - Giráldez, F. J. AU - Mantecón, A. R. SP - 111 EP - 120 DA - 2004 DO - 10.22358/jafs/67393/2004 UR - https://doi.org/10.22358/jafs/67393/2004 ER -