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

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:34:11Z
Fecha de publicación2019-01-01
ResumenObjectives: The objective of this research was to evaluate the influence of rumen-protected methionine and lysine on growth performance of calf-fed Holstein steers during the initial 84-d feedlot phase and relate responses to measures of AA supply to the small intestine. Material and Methods: Seventy-two Holstein steer calves (128 ± 9 kg) were blocked by weight and assigned to 12 pens (6 steers per pen). Steers were fed a diet based on steam-flaked corn formulated to provide 105% of theoretical MP requirements plus 0, 0.4, and 0.8% Smartamine ML (Adisseo, Alpharetta, GA; 55% L-lysine-HCl and 15% DL-methionine coated with a pH-sensitive polymer). Six Holstein steers (143 ± 13 kg) with cannulas in rumen and proximal duodenum were used in a crossover design to evaluate characteristics of digestion and AA supply to the intestine of the basal diet plus 0 versus 0.8% Smartamine ML. Results and Discussion: Methionine and lysine supplementation did not affect DMI (P = 0.27) but enhanced ADG, gain efficiency (linear effect, P = 0.03), and estimated dietary NE (linear effect, P = 0.04). Amino acid supplementation increased (P < 0.01) intestinal supply of methionine and lysine and postruminal (2.4%, P = 0.03) and total-tract (3.2%, P < 0.01) N digestion. Metabolizable methionine and lysine supplies for the growth performance trial were associated (R<sup>2</sup> ≥ 0.88) with the efficiency of ME for maintenance and gain. Implications and Applications: Supplementation with rumen-protected methionine and lysine may enhance gain efficiency and dietary energetics of growing Holstein calves during the early growing phase. The magnitude of the response is likely dependent on the otherwise general adequacy of nonspecific MP.es_ES
Doihttps://doi.org/10.15232/aas.2019-01843es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/5970
Idiomaenes_ES
EditorialElsevier Inces_ES
RelaciónApplied Animal Sciencees_ES
URL relacionadohttps://doi.org/10.15232/aas.2019-01843es_ES
DerechosAcceso restringido / Suscripción (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_16eces_ES
FuenteApplied Animal Science
Palabra claveamino acid supplementationes_ES
Palabra clavedigestiones_ES
Palabra clavefeedlotes_ES
Palabra claveHolsteines_ES
Palabra claveperformancees_ES
TítuloInfluence of supplementation of growing diets enriched with rumen-protected methionine and lysine on feedlot performance and characteristics of digestion in Holstein steer calveses_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorMontaño, M.F.
AutorChirino, J.O.
AutorLatack, B.C.
AutorSalinas-Chavira, J.
AutorZinn, R.A.
AutorMontaño, M.F.es_ES
AutorChirino, J.O.es_ES
AutorLatack, B.C.es_ES
AutorSalinas-Chavira, J.es_ES
AutorZinn, R.A.es_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número3es_ES
Rango de páginas318-324es_ES
URL relacionadahttps://doi.org/10.15232/aas.2019-01843
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen35es_ES

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