title: Effect of monensin on rumen fermentation and performance of young calves.
abstract: The effect of monensin on the growth and rumen metabolism of young calves (30 days old initially) was followed in 70-day experiment. Calves diet consisted of a milk substitute (4 1 per day), a concentrate mixture (13 g per 1 kg of live weight per day) and meadow hay ad libitum. Ten calves were fed 0.65 mg of monensin (SPOFA, Czechoslovakia) per 1 kg of live weight per day. Ten calves served as a control. The non-glucogenic/glucogenic ratio of VFA, mol-% acetate and butyrate were significantly lower and propionate higher in monensin-treated calves. Monensin-fed calves gained non significantly more (+ 7.2%) than control calves. A possible mode of action of monensin in young calves is discussed.
authors.affiliation: Ukrainian Research Institute of Physiology and Biochemistry of Farm Animals, Lvov.
authors.forename: G I
authors.initials: GI
authors.lastname: Kalachnyuk
authors.forename: M
authors.initials: M
authors.lastname: Marounek
authors.forename: O G
authors.initials: OG
authors.lastname: Savka
authors.forename: B M
authors.initials: BM
authors.lastname: Leskovich
mesh_terms: D000818:Animals; D002417:Cattle / Q000254:growth & development* / Q000378:metabolism; D005232:Fatty Acids, Volatile / Q000032:analysis; D005285:Fermentation / Q000187:drug effects*; D006863:Hydrogen-Ion Concentration; D007773:Lactates; D019344:Lactic Acid; D008297:Male; D008985:Monensin / Q000494:pharmacology*; D012417:Rumen / Q000032:analysis / Q000187:drug effects* / Q000378:metabolism; D015430:Weight Gain / Q000187:drug effects
chemical_list: D005232:Fatty Acids, Volatile; D007773:Lactates; D019344:Lactic Acid; D008985:Monensin