Suplementación con hidroxianálogo de metionina: efecto sobre el desempeño productivo en vacas lecheras

Autores/as

  • Omar Vargas Villalobos Cooperativa de Productores de Leche, Dos Pinos R.L.
  • Oscar Cambronero Castro Faryvet S.A., Unidad de Investigación.
  • Jorge Alberto Elizondo Salazar Universidad de Costa Rica

DOI:

https://doi.org/10.15517/ma.v28i3.26897

Palabras clave:

aminoácidos esenciales, análogo de metionina, sólidos lácteos, producción de leche.

Resumen

Suplementar vacas lecheras con dietas bajas en proteína con aminoácidos específicos, es una estrategia promisoria para contrarrestar el potencial efecto negativo de una deficiencia de proteína metabolizable en la productividad. El objetivo del presente estudio fue cuantificar el desempeño productivo de vacas lactantes y la calidad de la leche ante dos dietas con diferente concentración de proteína cruda (PC) y el suministro de hidroxianálogo de metionina (HMTBA). El estudio se realizó en una finca lechera comercial en la localidad de Alfaro Ruiz, Alajuela, Costa Rica, durante el primer semestre del 2014. Veinte vacas multíparas de la raza Holstein bajo un sistema de pastoreo, fueron agrupadas de acuerdo con los días de lactancia y número de parto. Dos dietas con diferentes concentraciones de PC (alto 16,6% y estándar 15,8%) con o sin inclusión de HMTBA (25 g/tm) fueron estudiadas en un arreglo factorial 2x2. No se encontraron efectos significativos (P>0,05) sobre la producción de leche, leche corregida al 4% de grasa, grasa láctea, proteína láctea, lactosa, sólidos totales o nitrógeno ureico en leche (NUL) al incluir HMTBA. Alimentar las vacas con alta concentración de PC incrementó significativamente (P<0,05) la concentración de NUL de 18,33 a 20,70 mg/dl. Suplementar HMTBA a vacas en pastoreo no tuvo una respuesta significativa (P>0,05) en las diferentes variables estudiadas y tampoco se encontró una retribución económica, debido a que no se incrementó la cantidad de leche ni los sólidos totales.

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Biografía del autor/a

Jorge Alberto Elizondo Salazar, Universidad de Costa Rica

Estación Experimental Alfredo Volio Mata

Director

Citas

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Publicado

2017-09-01

Cómo citar

Vargas Villalobos, O., Cambronero Castro, O., & Elizondo Salazar, J. A. (2017). Suplementación con hidroxianálogo de metionina: efecto sobre el desempeño productivo en vacas lecheras. Agronomía Mesoamericana, 28(3), 643–655. https://doi.org/10.15517/ma.v28i3.26897