Effect of energy density and virginiamycin supplementation in diets on growth performance and digestive function of finishing steers

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:33:21Z
Fecha de publicación2017-01-01
ResumenObjective: This study was determined the influence of virginiamycin supplementation on growth-performance and characteristics of digestion of cattle with decreasing dietary net energy value of the diet for maintenance (NEm) from 2.22 to 2.10 Mcal/kg. Methods: Eighty crossbred beef steers (298.2+/-6.3 kg) were used in a 152-d performance evaluation consisting of a 28-d adaptation period followed by a 124-d growing-finishing period. During the 124-d period steers were fed either a lesser energy dense (LED, 2.10 Mcal/kg NEm) or higher energy dense (HED, 2.22 Mcal/kg NEm) diet. Diets were fed with or without 28 mg/kg (dry matter {[}DM] basis) virginiamycin in a 2x2 factorial arrangement. Four Holstein steers (170.4+/-5.6 kg) with cannulas in the rumen (3.8 cm internal diameter) and proximal duodenum were used in 4x4 Latin square experiment to study treatment effects on characteristics of digestion. Results: Neither diet energy density nor virginiamycin affected average daily gain (p> 0.10). As expected, dry matter intake and gain efficiency were greater (p< 0.01) for LED-than for HED-fed steers. Virginiamycin did not affect estimated net energy value of the LED diet. Virginiamycin increased estimated NE of the HED diet. During daylight hours when the temperature humidity index averaged 81.3+/-2.7, virginiamycin decreased (p< 0.05) ruminal temperature. Virginiamycin did not influence (p> 0.10) ruminal or total tract digestion. Ruminal (p = 0.02) and total tract digestion (p< 0.01) of organic matter, and digestible energy (p< 0.01) were greater for HED vs LED. Ruminal microbial efficiency was lower (p< 0.01) for HED vs LED diets. Conclusion: The positive effect of virginiamycin on growth performance of cattle is due to increased efficiency of energy utilization, as effects of virginiamycin on characteristics of digestion were not appreciable. Under conditions of high ambient temperature virginiamycin may reduce body temperature.es_ES
Doihttps://doi.org/10.5713/ajas.16.0826es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/5199
Idiomaenes_ES
EditorialASIAN-AUSTRALASIAN ASSOC ANIMAL PRODUCTION SOCes_ES
RelaciónAsian-Australasian Journal of Animal Scienceses_ES
URL relacionadohttps://doi.org/10.5713/ajas.16.0826es_ES
DerechosAcceso abierto (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuenteAsian-Australasian Journal of Animal Sciences
Palabra claveVirginiamycines_ES
Palabra claveEnergy Concentrationes_ES
Palabra claveFeedlotes_ES
Palabra claveCattlees_ES
Palabra clavePerformancees_ES
Palabra claveDigestiones_ES
TítuloEffect of energy density and virginiamycin supplementation in diets on growth performance and digestive function of finishing steerses_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorNavarrete, Juan D.
AutorMontano, Martin F.
AutorRaymundo, Constantino
AutorSalinas-Chavira, Jaime
AutorTorrentera, Noemi
AutorZinn, Richard A.
AutorNavarrete, Juan D.es_ES
AutorMontano, Martin F.es_ES
AutorRaymundo, Constantinoes_ES
AutorSalinas-Chavira, Jaimees_ES
AutorTorrentera, Noemies_ES
AutorZinn, Richard A.es_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número10es_ES
Rango de páginas1396-1404es_ES
URL relacionadahttps://doi.org/10.5713/ajas.16.0826
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen30es_ES

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