Effect of monensin on milk production by Holstein and Jersey cows

Journal of Dairy Science
J H Van der WerfJ K Oldenbroek

Abstract

Effects of the administration of monensin via concentrates to dairy cows were studied in two trials. In one trial, 64 Holstein cows were assigned to four groups that received 0, 150, 300, or 450 mg/d of monensin from 5 to 24 wk postpartum. Milk production tended to increase (4.0, 3.3, and 5.4%, respectively) for the three groups of treated cows. Fat content was decreased by 0.09, 1.89, and 4.09 g/kg, respectively, for these same three groups. The effect on protein content was small and nonsignificant. Feed intake was reduced in treated cows, although not significantly, and feed efficiency was improved by monensin. In a confirmatory trial, 58 Holstein and 22 Jersey cows were allocated either to a control group or to a treatment group that received 300 mg/d of monensin from 5 to 36 wk postpartum during the first lactation and from 2 wk before calving to 36 wk postpartum during a subsequent lactation. During the first lactation, cows in the treatment group showed a 7% increase in milk production, a relative decrease (1.4 g/kg) in milk fat content, and equal protein content compared with cows in the control group. Body weight gain and body condition scores near the end of the treatment period were higher for cows in the treatment g...Continue Reading

References

Feb 1, 1989·Journal of Dairy Science·F D SauerW J Cantwell
Jun 1, 1984·Journal of Animal Science·W G Bergen, D B Bates
Jun 1, 1984·Journal of Animal Science·R D GoodrichJ C Meiske
Mar 1, 1982·Journal of Animal Science·T G NagarajaA D Dayton

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Citations

Nov 21, 2017·Journal of Dairy Science·R K McGuffey
Aug 17, 2006·Australian Veterinary Journal·E KennermanH Biricik
Mar 21, 2007·Journal of Dairy Science·N E OdongoB W McBride
Dec 16, 2003·Journal of Dairy Science·S K TallamJ S Walton
Sep 10, 1999·Journal of Dairy Science·L J ErasmusD O'Hagan
Sep 30, 2008·Pakistan Journal of Biological Sciences : PJBS·Behnam GhorbaniSaeed Zerehdaran
Sep 29, 2009·Applied Microbiology and Biotechnology·Jeffery A McGarveyFrank M Mitloehner
Apr 27, 2012·Journal of Animal Physiology and Animal Nutrition·Sh KhodamoradiA Azarfar
Oct 11, 2003·Journal of Environmental Quality·Luis Orlindo TedeschiThomas Paul Tylutki

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