title: The effect of tannin treatment and subsequent urea supplementation of sunflower meal on the in vitro digestibility of its crude protein for ruminants.
abstract: The effect of tannin treatment (TSFM) and subsequent urea supplementation (TSFM + U) on the digestibility of sunflower meal (SFM) protein was studied by means of a three-phase laboratory method simulating the ruminant's digestion. Under the influence of the ruminal fluid 67% of SFM protein, 62% of TSFM protein and 58% of TSFM + U protein was degraded. The pepsin and pancreatin digestibilities of rumen undegraded protein (UDP) were as follow: 58.2% (SFM), 56.6% (TSFM), 43.3% (TSFM + U), and 22.0% (SFM), 28.8% (TSFM), 17.5% (TSFM + U), respectively. The four fractions (dissolved protein, oligopeptides, amino acids, and ammonia) of rumen degradable protein (DP) were also determined: 85 to 92% of rumen degradable protein was recovered in these four fractions. Owing to tannic acid treatment the quantity of dissolved protein decreased and that of oligopeptides increased.
authors.affiliation: Department of Physiology and Biochemistry, University of Veterinary Science, Budapest, Hungary.
authors.forename: T
authors.initials: T
authors.lastname: Veresegyházy
authors.forename: S
authors.initials: S
authors.lastname: Fekete
mesh_terms: D000821:Animal Feed; D000818:Animals; D004044:Dietary Proteins / Q000378:metabolism*; D004063:Digestion; D006368:Helianthus; D047348:Hydrolyzable Tannins / Q000494:pharmacology*; D008297:Male; D012639:Seeds; D012756:Sheep / Q000378:metabolism*; D014508:Urea / Q000008:administration & dosage
chemical_list: D004044:Dietary Proteins; D047348:Hydrolyzable Tannins; D014508:Urea