Influence of methionine supplementation of growing diets enriched with lysine on feedlot performance and characteristics of digestion in Holstein steer calves

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:33:20Z
Fecha de publicación2017-01-01
ResumenObjective: Two trials were conducted in order to examine the effects of level of supplemental methionine on productive performance, dietary energetic, plasma amino acid concentration, and digestive function. Methods: Dietary treatments consisted of a steam-flaked corn-based diet containing urea as the only source of supplemental nitrogen supplemented with no supplemental amino acid (control), or control plus 1.01\% lysine and 0.032\%, 0.064\%, 0.096\%, or 0.128\% methionine. In Trial 1, 150 Holstein steer calves (127 +/- 4.9 kg) were utilized to evaluate the influence of treatments on growth-performance, dietary energetic, plasma amino acid concentration during the first 112 days of growing period. During the initial 56-d period calves received the 5 experimental diets. During the subsequent 56-d period all calves were fed the control diet. Results: During the initial 56-d period, methionine supplementation increased (linear effect, p< 0.01) plasma methionine. In the presence of supplemental lysine, increases on level of methionine in diet did not affect average daily gain. However, increased gain efficiency (quadratic effect, p = 0.03) and estimated dietary net energy (NE; linear effect, p = 0.05). Estimated metabolizable methionine supply was closely associated (R-2 = 0.95) with efficiency NE utilization for maintenance and gain. During the subsequent 56-d period, when all calves received the control diet (no amino acid supplementation), plasma amino acid concentrations and growth performance was not different among groups. However, the effects of methionine supplementation during the initial 56-period carried over, so that following a 56-d withdrawal of supplementation, the overall 112-d effects on gain efficiency (quadratic effect, p = 0.05) dietary NE (linear effect, p <= 0.05) remained appreciable. In Trial 2, 5 cannulated Holstein steers were used to evaluate treatment effects on characteristics of digestion and amino acid supply to the small intestine. There were no treatment effects on flow of dietary and microbial N to the small intestine. Postruminal N digestion increased (p = 0.04) with increasing level of supplemental methionine. Methionine supplementation linearly increased (p< 0.01) duodenal flow of methionine. Likewise, lysine supplementation increased an average of 4.6\% (p = 0.04) duodenal flow of lysine. In steers that received non-supplemented diet, observed intestinal amino acid supply were in good agreement with expected. Conclusion: We conclude that addition of rumen-protected methionine and lysine to diets may enhance gain efficiency and dietary energetics of growing Holstein calves. Observed amino acid supply to the small intestine were in good agreement with expected, supportive of NRC (2000, Level 1).es_ES
Doihttps://doi.org/10.5713/ajas.16.0181es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/5167
Idiomaenes_ES
EditorialASIAN-AUSTRALASIAN ASSOC ANIMAL PRODUCTION SOCes_ES
RelaciónAsian-Australasian Journal of Animal Scienceses_ES
URL relacionadohttps://doi.org/10.5713/ajas.16.0181es_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 claveHolsteines_ES
Palabra claveFeedlotes_ES
Palabra claveAmino Acid Supplementationes_ES
Palabra clavePerformancees_ES
Palabra claveDigestiones_ES
TítuloInfluence of methionine supplementation of growing diets enriched with lysine on feedlot performance and characteristics of digestion in Holstein steer calveses_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorTorrentera, Noemi
AutorCarrasco, Ramses
AutorSalinas-Chavira, Jaime
AutorPlascencia, Alejandro
AutorZinn, Richard A.
AutorTorrentera, Noemies_ES
AutorCarrasco, Ramseses_ES
AutorSalinas-Chavira, Jaimees_ES
AutorPlascencia, Alejandroes_ES
AutorZinn, Richard A.es_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número1es_ES
Rango de páginas42-50es_ES
URL relacionadahttps://doi.org/10.5713/ajas.16.0181
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen30es_ES

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