Tropical Animal Health and Production

, Volume 51, Issue 2, pp 339–344 | Cite as

Effects of monensin on growth performance of beef heifers consuming warm-season perennial grass and supplemented with sugarcane molasses

  • Philipe MorielEmail author
  • Joao M. B. Vendramini
  • Caio Carnelos
  • Matheus B. Piccolo
  • Hiran M. da Silva
Regular Articles


The objective of this study was to evaluate the effects of monensin on performance of beef heifers fed warm-season forages. Brangus heifers (n = 24) were stratified by BW and BCS, and randomly assigned into 1 of 12 bahiagrass pastures (1.2 ha and 2 heifers/pasture). Heifers were offered 14 kg of sugarcane molasses and 3.5 kg of cottonseed meal weekly from day 0 to 84. Treatments were randomly assigned to pastures (6 pastures/treatment) and consisted of heifers supplemented with or without 200 mg/day of monensin. On d 85, heifers were allocated to individual drylot pens, provided free choice access to bermudagrass hay, and received their respective treatment for 10 d of adaptation and 11 d of data collection. Monensin did not impact (P ≥ 0.13) heifer BW, BCS, overall ADG, bahiagrass IVDOM, CP, herbage mass, and allowance. Supplement disappearance after 10 and 34 h of supplementation was greater for control vs. monensin heifers (P = 0.04) and tended to be greater for control vs. monensin heifers 24 h post-supplementation (P = 0.07). Plasma concentrations of glucose, IGF-1, and BUN (P ≥ 0.24) did not differ between treatments. From d 85 to 106, forage and total DM intake, in vivo DM digestibility, and heifer growth performance did not differ between treatments (P ≥ 0.12). Therefore, adding monensin to sugarcane molasses-based supplements decreased supplement consumption rate, but did not impact growth and blood parameters of heifers grazing warm-season grasses with limited nutritive value.


Beef cattle Feed additives Monensin Self-fed Supplementation 


Compliance with ethical standards

Animals were cared for in accordance with acceptable practices and experimental protocols reviewed and approved by the University of Florida Institutional Animal Care and Use Committee (#201609664).

Conflict of interest

The authors declare that they have no conflict of interest.


  1. Aiello, R. J., Armentano, L. E., Bertics, S. J., Murphy, A.T., 1989. Volatile fatty acid uptake and propionate metabolism in ruminant hepatocytes. J. Dairy Sci. 72, 942–949.CrossRefGoogle Scholar
  2. Bohnert, D.W., Rodrigues, M. C, Vieira, M.C., Cooke, R.F., 2016. Influence of supplement type and monensin addition on utilization of low-quality, cool-season forage by beef cattle. J. Anim. Sci. 94, 313–314.CrossRefGoogle Scholar
  3. Ellis, W.C., Telford, J.P., Lippke, H., Riewe, M.W., 1984. Forage and grazing effects on intake and utilization of annual ryegrass by cat-tle. p. 223–234. In: G.W. Horn (ed.) Proc. of the Nat. Wheat Pasture Symposium. Okla. Agr. Esp. Sta. MP-115.Google Scholar
  4. Ezenwa, I.V., Kalmbacher, R.S., Arthington, J.D., Pate, F.M., 2006. Creeping signalgrass versus bahiagrass for cow and calf grazing. Agron. J. 98, 1582–1588.CrossRefGoogle Scholar
  5. Fieser, B.G., Horn, G.W., Edwards, J.T., 2007. Effects of energy, mineral supplementation, or both, in combination with monensin on performance of steers grazing winter wheat pasture. J. Anim. Sci. 85, 3470–3480.CrossRefGoogle Scholar
  6. Gonzalez, M.A., Hussey, M.A., Conrod, B.E., 1990. Plant height, disk and capacitance meters used to estimate bermudagrass herbage mass. Agron. J. 82, 861–864.CrossRefGoogle Scholar
  7. Hammond, A.C., 1997. Update on BUN and MUN as a guide for protein supplementation in cattle. Pages 43–52 in Proc. Florida Rumin. Nutr. Symp. Univ. of Florida, Gainesville.Google Scholar
  8. Hatch, C.F., Beeson, W.M. 1972. Effect of different levels of sugarcane molasses on nitrogen and energy utilization in urea rations for steers. J. Anim. Sci. 35, 854–858.CrossRefGoogle Scholar
  9. Inyang, U., Vendramini, J.M.B., Sollenberger, L.E., Sellers, B., Adesogan, A., Paiva, L., Lunpha, A., 2010. Effects of stocking rates on animal performance and herbage responses of Mulato and bahiagrass pastures. Crop Sci. 50, 179–185.CrossRefGoogle Scholar
  10. Krizsan, S. J., Huhtanen, P., 2013. Effect of diet composition and incubation time on feed indigestible neutral detergent fiber concentration in dairy cows. J. Dairy Sci. 96, 1715–1726.CrossRefGoogle Scholar
  11. Moore, J.E., Mott, G.O., 1974. Recovery of residual organic matter from “in vitro” digestion of forages. J. Dairy Sci. 57, 1258–1259.CrossRefGoogle Scholar
  12. Moriel, P., Cooke, R.F., Bohnert, D.W., Vendramini, J.M.B., Arthington, J.D., 2012. Effects of energy supplementation frequency and forage quality on performance, reproductive, and physiological responses of replacement beef heifers. J. Anim. Sci. 90, 2371–2380.CrossRefGoogle Scholar
  13. Muller, R.D., Potter, E.L., Wray, M.I., Richardson, L.F., Grueter, H.P., 1986. Administration of monensin in self-fed (salt limiting) dry supplements or on an alternative-day feeding schedule. J. Anim. Sci. 62, 593–600.CrossRefGoogle Scholar
  14. Poos, M.I., Hanson, T.L., Klopfenstein, T.J., 1979. Monensin effects on diet digestibility, ruminal protein bypass and mi crobial protein synthesis. J. Anim. Sci. 48, 1516–1524.CrossRefGoogle Scholar
  15. Rouquette F.M. Jr, Griffin, J.L., Randel, R.D., Carroll, L.H., 1980 Effect of monensin on gain and forage utilization by calves grazing bermudagrass. J. Anim. Sci. 51, 521–525.CrossRefGoogle Scholar
  16. Rowe, J.B., Murray, P.J., Godfrey, S.I., 1991. Manipulation of the fermentation and digestion to optimize the use of forage resources for ruminant production. In: Isotope and related techniques in animal production and health. International Atomic Energy Agency, Vienna. p. 83–99.Google Scholar
  17. Royes, J.B., W.F. Brown, F.G. Martin, and D.B. Bates. 2001. Source and level of energy supplementation for yearling cattle fed ammoniated hay. J. Anim. Sci. 79:1313–1321.Google Scholar
  18. Sollenberger, L.E., Moore, J.E., Allen, V.G., Pedreira, C.G.S., 2005. Reporting forage allowance in grazing experiments. Crop Sci. 45, 896–900.CrossRefGoogle Scholar
  19. Vendramini, J.M.B., Sanchez, J.M.D., Cooke, R.F., Aguiar, A.D., Moriel, P., da Silva, W.L., Cunha, O.F.R., Ferreira, P.D.S., Pereira, A.C., 2015. Stocking rate and monensin level effects on growth performance of beef cattle consuming warm-season grasses. J. Anim. Sci. 93, 3682–3689.CrossRefGoogle Scholar
  20. Whitlow, L.H., Marshall, S.P., Van Horn, H.H., Flores, J.R., 1976. Liquid feed passage route into stomach compartments, influence of abomasal infusions on plasma glucose, and supplementation of dry rations with liquid feeds from lick-wheel feeders. J. Dairy Sci. 59, 675–681.CrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Philipe Moriel
    • 1
    Email author
  • Joao M. B. Vendramini
    • 1
  • Caio Carnelos
    • 1
  • Matheus B. Piccolo
    • 1
  • Hiran M. da Silva
    • 1
  1. 1.University of Florida – Range Cattle Research & Education CenterOnaUSA

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