title: [The effect of lasalocid on apparent digestibility, characteristics of rumen fermentation and fattening and slaughter output of bulls].
abstract: Four digestion experiments with 5 wethers each (Feeding: artificially dried grass; 0, 15, 30 or 60 mg lasalocid per animal and day), two short time experiments (Exp. 1: 3 rumen fistulated sheep; feeding; artificially dried grass; 0, 15, 30 or 60 mg lasalocid per animal and day; exp. 2: 20 bulls; feeding; 2 kg concentrates per animal and day; wheat straw ad libitum; 0, 150 or 300 mg lasalocid per animal and day) and one individual feeding experiment (24 bulls per group; duration: 279 days, feeding: 2 kg concentrates per animal and day, corn silage and whole barley-grass silage ad libitum; 0 or 100/200 mg lasalocid per animal and day) were carried out in order to investigate the influence of the ionophore lasalocid on digestibility, figures of rumen fermentation as well as fattening and slaughtering results of bulls. Higher doses of lasalocid (30 and 60 mg per animal and day) decreased significantly digestibility of organic matter (1.8 and 2.8 units) and crude fibre (5.8 and 7.2 units). Relative acetate (22 to 120 mmoles per mol) and butyrate concentration (23 to 58 mmoles per mol) were decreased and molar propionate concentration of rumen liquid (25 to 154 mmoles per mol) was increased depending on level of lasalocid supplementation. Lasalocid did not significantly influence the dry matter intake; daily weight gain and slaughtering results were increased (4.4 and 6.1%), energy efficiency was improved (3.8%). Effects of lasalocid are similar to that of monensin. A dose of 20 to 30 mg lasalocid per kg dry matter is recommended.
authors.affiliation: Wissenschaftsbereich Tierernährungschemie, Agrarwissenschaftliche Fakultät, Universität Leipzig.
authors.forename: G H
authors.initials: GH
authors.lastname: Richter
authors.forename: G
authors.initials: G
authors.lastname: Flachowsky
mesh_terms: D000818:Animals; D002417:Cattle / Q000254:growth & development / Q000378:metabolism*; D004043:Dietary Fiber / Q000378:metabolism; D004063:Digestion / Q000187:drug effects*; D004435:Eating / Q000187:drug effects; D004734:Energy Metabolism / Q000187:drug effects; D005285:Fermentation / Q000187:drug effects; D007832:Lasalocid / Q000737:chemistry / Q000494:pharmacology*; D008297:Male; D015394:Molecular Structure; D012417:Rumen / Q000187:drug effects* / Q000378:metabolism; D012756:Sheep / Q000254:growth & development / Q000378:metabolism*; D015430:Weight Gain / Q000187:drug effects
chemical_list: D004043:Dietary Fiber; D007832:Lasalocid
vernacular_title: Einfluss von Lasalocid auf scheinbare Verdaulichkeit, Kennzahlen der Pansenfermentation sowie Mast- und Schlachtleistung von Bullen.