Efecto de la suplementación con proteína sobre algunos parámetros ruminales en bovinos

  • N. P. Stritzler INTA EEA Anguil Universidad Nacional de La Pampa, Facultad de Agronomía, Cátedra de Nutrición Animal

Palabras clave:

suplementación proteica, Harina de soja, parámetros ruminales

Resumen

Con el objeto de medie el efecto de la suplementación con harina de soja sobre parámetros ruminales, se suministró una dieta de heno de rye grass a vacas secas Holstein-Freisian fistuladas de rumen, con (CS) o sin (SS) suplementación de 1 Kg de harina de soja por vaca/día. Se obtuvieron muestras de contenido ruminal a las 0,2,4,8, y 10 horas de consumido el suplemento, simultáneamente para ambos tratamientos y sobre ellas se midió: concentración de amoníaco, ATP y ácidos grasos volátiles (AGV), composición de AGV y conteo de bacterias ruminales. Se encontraron diferencias significativas en el nivel de amoniaco (es: 86.4 mg/I; ss: 53.7 mg/I; P<0.01), número de bacterias (CS: 1.11 x 109; SS: 0.68 x 109; P<0.01), concentración de ácido propiónico (CS: 16.8 mmol/I; SS: 15.4 mmol/l; P<0.01) y ATP entre la hora cero (muestra tomada previamente al suministro del suplemento) y Ias horas 2, 4 Y 6 de muestreo, para ambos tratamientos (P<0.01): Hora cero: 9.7 g ATP/g; hora dos: 20.6 g/g; hora cuatro: 19.7 g/g; hora seis: 25.7 g/g. El número de microorganismos ruminales fue un 62% mayor en el tratamiento con suplementación respecto del testigo, indicando el efecto de la harina de soja sobre el crecimiento de la población ruminal.

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2020-06-29

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