Effects of lasalocid, narasin, or virginiamycin supplementation on rumen parameters and performance of beef cattle fed forage-based diet

dc.contributor.authorArantes Miszura, Alexandre
dc.contributor.authorMarques, Rodrigo S
dc.contributor.authorMontanher Polizel, Daniel
dc.contributor.authorIeda Cappellozza, Bruno
dc.contributor.authorAlves Cruz, Vinicius
dc.contributor.authorOgg, Makayla Anne
dc.contributor.authorRoman Barroso, José Paulo
dc.contributor.authorBagio Oliveira, Gabriela
dc.contributor.authorStorti Martins, André
dc.contributor.authorCintra Limede, Arnaldo
dc.contributor.authorMaia Ferreira, Evandro
dc.contributor.authorGouvêa, Vinícius N
dc.contributor.authorVaz Pires, Alexandre
dc.date.accessioned2023-06-06T17:12:08Z
dc.date.available2023-06-06T17:12:08Z
dc.date.issued2023-04
dc.description.abstractTwo experiments were designed to evaluate the impacts of supplementing lasalocid (LAS), narasin (NAR), or virginiamycin (VRM) on rumen fermentation parameters, apparent nutrient digestibility, and blood parameters (Exp. 1), as well as feed intake and performance (Exp. 2) of Nellore cattle consuming a forage-based diet. In Exp. 1, 32 rumen-fistulated Nellore steers (initial shrunk body weight [BW] = 355 ± 4.4 kg) were assigned to a randomized complete block design. Within block, animals were randomly assigned to one of four treatments: 1) forage-based diet without feed additives (CON), 2) CON diet plus 13 mg/kg of dry matter (DM) of NAR, 3) CON diet plus 20 mg/kg of DM of sodium LAS, or 4) CON diet plus 20 mg/kg of DM of VRM. No treatment effects were detected (P ≥ 0.32) for intake and apparent digestibility of nutrients. Steers fed NAR had the lowest (P ≤ 0.01) molar proportion of acetate on day 28, 56, and 112 vs. CON, LAS, and VRM steers, whereas acetate did not differ (P ≥ 0.25) between LAS, VRM, and CON steers from day 28 to 84. On day 112, steers fed LAS had a lower (P < 0.02) molar proportion of acetate vs. VRM and CON, whereas it did not differ between CON and VRM (P > 0.33). Steers receiving NAR had a greater (P ≤ 0.04) ruminal propionate vs. CON, LAS, and VRM, whereas LAS steers had greater (P < 0.04) propionate vs. CON and VRM steers on day 28 and 112, and it did not differ (P > 0.22) between CON and VRM. In Exp. 2, 160 Nellore bulls were blocked by initial shrunk BW (212 ± 3.1 kg) in a 140-d feedlot trial. Diets contained the same treatments used in Exp. 1. Bulls fed NAR had greater (P < 0.02) average daily gain (ADG) vs. CON and VRM, and similar (P = 0.17) ADG between NAR and LAS, whereas ADG did not differ (P > 0.28) between LAS, VRM, and CON bulls. A treatment effect was detected (P = 0.03) for dry matter intake, being greater in NAR vs. CON, LAS, and VRM bulls, and similar (P > 0.48) between CON, LAS, and VRM bulls. A tendency was detected (P = 0.09) for feed efficiency, which was greater (P < 0.02) in NAR bulls vs. CON and VRM, and similar (P = 0.36) between NAR and LAS bulls. From day 112 to 140, bulls receiving NAR were heavier (P < 0.03) vs. CON, LAS, and VRM bulls, but no differences were observed (P > 0.51) between CON, LAS, and VRM bulls. Collectively, ruminal fermentation profile and intake were impacted by NAR supplementation, which partially contributed to the enhanced performance of Nellore bulls receiving a forage-based diet.en_US
dc.identifier.citationAlexandre Arantes Miszura and others, Effects of lasalocid, narasin, or virginiamycin supplementation on rumen parameters and performance of beef cattle fed forage-based diet, Journal of Animal Science, Volume 101, 2023, skad108, https://doi.org/10.1093/jas/skad108en_US
dc.identifier.issn0021-8812
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/17949
dc.language.isoen_USen_US
dc.publisherOxford University Pressen_US
dc.rightscc-byen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subjectbos indicusen_US
dc.subjectdigestibilityen_US
dc.subjectfeed additivesen_US
dc.subjectforageen_US
dc.subjectionophoreen_US
dc.subjectperformanceen_US
dc.subjectruminal parametersen_US
dc.titleEffects of lasalocid, narasin, or virginiamycin supplementation on rumen parameters and performance of beef cattle fed forage-based dieten_US
dc.typeArticleen_US
mus.citation.extentfirstpage1en_US
mus.citation.extentlastpage12en_US
mus.citation.journaltitleJournal of Animal Scienceen_US
mus.identifier.doi10.1093/jas/skad108en_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentAnimal & Range Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

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