Effects of a microencapsulated blend of essential oils supplemented alone or in combination with monensin on performance and carcass characteristics of growing and finishing beef steersUse of trade names in this publication does not imply endorsement by Colorado State University or criticism of similar products not mentioned. Mention of a proprietary product does not constitute a guarantee or warranty of the products by Colorado State University or the authors and does not imply its approval to

Effects of a microencapsulated blend of essential oils supplemented alone or in combination with monensin on performance and carcass characteristics of growing and finishing beef steersUse of trade names in this publication does not imply endorsement by Colorado State University or criticism of similar products not mentioned. Mention of a proprietary product does not constitute a guarantee or warranty of the products by Colorado State University or the authors and does not imply its approval to

A microencapsulated blend of essential oils (EO) fed to feedlot cattle was evaluated against monensin (MON) or used in association with MON and compared against MON alone or MON + tylosin (TYL). We used a randomized complete block design using weaned steers (n = 656; 254.4±7.9 kg of initial BW) assi...

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Bibliographic Details
Published in:Applied Animal Science 2019-04, Vol.35 (2), p.177-184
Main Authors: Araujo, R.C., Daley, D.R., Goodall, S.R., Jalali, S., Guimarães Bisneto, O.A., Budde, A.M., Wagner, J.J., Engle, T.E.
Format: Article
Language:eng
Subjects:
antibiotic replacement
feedlot performance
ionophore
plant secondary compounds
tylosin
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Summary:A microencapsulated blend of essential oils (EO) fed to feedlot cattle was evaluated against monensin (MON) or used in association with MON and compared against MON alone or MON + tylosin (TYL). We used a randomized complete block design using weaned steers (n = 656; 254.4±7.9 kg of initial BW) assigned to 32 pens (8 replicates per treatment) and fed for 208 d. The treatments were as follows: MON + TYL (33 mg and 11 mg/kg of DM, respectively); MON (33 mg/kg of DM); EO (150 mg/kg of DM); and MON + EO (33 mg and 150 mg/kg of DM, respectively). Treatments were similar for final BW (P ≥ 0.24) and overall ADG (P ≥ 0.27). Overall DMI did not differ for MON versus EO (P ≥ 0.93); however, MON + EO had reduced overall DMI compared with MON (P = 0.03; 9.2 vs. 9.6 kg/d, respectively) or MON + TYL (P = 0.04; 9.2 vs. 9.6 kg/d, respectively). There was no effect (P ≥ 0.14) on overall G:F; however, adjusted overall G:F tended to be greater for MON + EO versus MON (P = 0.08; 0.187 vs. 0.182, respectively) and for MON + EO versus MON + TYL (P = 0.07; 0.187 vs. 0.183, respectively). Carcass characteristics were similar (P ≥ 0.11) for all treatments. Steers receiving EO had similar performance and carcass characteristics compared with steers fed MON. The MON + EO tended to improve carcass-adjusted performance compared with MON. The replacement of TYL with EO when in combination with MON may result in additional improvement in feed efficiency without changes in liver abscesses.
ISSN:2590-2865
2590-2865