title: [Ruminal 15N-straw degradation in sacco and the in vivo digestibility of 15N from straw in the sheep and pony].
abstract: The nylon-bag method was applied for determination of the rumen degradation of dry matter and nitrogen of 15N-labelled wheat straw. For the experiment 4 wethers fitted with a rumen cannula were used. The bags containing 15N straw were introduced into the rumen and withdrawn 3, 6 or 12 h after incubation. In a second experiment the apparent 15N-digestibility of the same straw was determined in wether and pony. The dry matter disappearance varied between 6 and 23%. For 15N-labelled straw the disappearance of 15N was higher than that of total N. 12 h after incubation 71% of 15N and only 25% of total N were disappeared. It was calculated that after incubation rumen microbial-N in the nylon bag increased from 31% (3 h) to 45% (6 h) and 61% (12 h) resp. The apparent 15N digestibility amounted 53 +/- 2% for wethers and 51 +/- 2% for ponies.
authors.affiliation: Sektion Tierproduktion und Veterinärmedizin, Karl-Marx-Universität Leipzig.
authors.forename: R
authors.initials: R
authors.lastname: Zander
authors.forename: G
authors.initials: G
authors.lastname: Flachowsky
authors.forename: R
authors.initials: R
authors.lastname: Schubert
authors.forename: K
authors.initials: K
authors.lastname: Gruhn
mesh_terms: D000821:Animal Feed; D000818:Animals; D004063:Digestion; D006736:Horses / Q000378:metabolism*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D009587:Nitrogen Isotopes; D012417:Rumen / Q000378:metabolism*; D012756:Sheep / Q000378:metabolism*
chemical_list: D009587:Nitrogen Isotopes; D009584:Nitrogen
vernacular_title: Der ruminale 15N-Stroh-Abbau in sacco und die In-vivo-Verdaulichkeit von 15N aus Stroh beim Schaf und Pony.