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Efecto de la L-Carnitina en el desempeño productivo y parámetros fisicoquímicos en pollos parrilleros de crecimiento rápido y crecimiento lento en el trópico
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Abstract
El objetivo de este estudio fue examinar el impacto de la L-Carnitina (0, 50 y 100 mg/kg) en el desempeño productivo y parámetros fisicoquímicos de pollos parrilleros Cornish Rock Cross de crecimientos rápido y lento. El diseño experimental fue de Bloques Completamente Aleatorizados, con 18 unidades experimentales. Los datos de desempeño productivo se recopilaron desde la semana de entrega hasta la semana de matanza. Los parámetros fisicoquímicos, como luminosidad (L*), intensidad roja (a*), intensidad amarilla (b*), pH, terneza (WBS), capacidad de retención de agua (CRA), presencia de "White Stripping" y "Woody Breast", se determinaron 24 horas postmortem (7, 8, 9 y 10 semanas). No hubo un incremento en peso final, ganancia en peso, consumo de alimento y eficiencia en conversión en aves de crecimiento rápido con mayor inclusión de L-carnitina (p<0.05). La inclusión de L-carnitina no afectó los parámetros fisicoquímicos; sin embargo, estos sí fueron afectados por el crecimiento y por la edad de matanza. Las aves de crecimiento rápido obtuvieron carne más clara, menos roja, menos amarilla, y valores de pH más bajos a la 7ma semana que luego incrementaron con la edad (p<0.05). Para ambos tipos de crecimiento se observó mayor terneza a la 8va semana (p<0.05).
The aim of this study was to examine the impact of different doses of L-Carnitine (0, 50, and 100 mg/kg) on the productive performance and physicochemical parameters of fast and slow-growing Cornish Rock Cross broiler chickens. The experimental design was a Completely Randomized Block, with 18 experimental units (cages). Productive performance was evaluated from the delivery week until slaughter. Physicochemical parameters, such as brightness (L*), redness (a*), yellow (b*) color intensity, pH, tenderness (WBS), water holding capacity (CRA), presence of White Stripping, and Woody Breast were determined 24 hours postmortem (7, 8, 9 and 10 weeks). Final body weight, weight gain, feed consumption and feed efficiency did not increase in fast growth rate birds with greater L-carnitine inclusion (p<0.05). The inclusion of L-carnitine did not affect the physicochemical parameters; however, these were affected by growth rate and age at slaughter. Birds with rapid growth rates displayed meat that was lighter, less red, and less yellow, had lower pH values on week 7 that then increased with age (p<0.05). With both growth rates meat was more tender on week 8 (p<0.05).
The aim of this study was to examine the impact of different doses of L-Carnitine (0, 50, and 100 mg/kg) on the productive performance and physicochemical parameters of fast and slow-growing Cornish Rock Cross broiler chickens. The experimental design was a Completely Randomized Block, with 18 experimental units (cages). Productive performance was evaluated from the delivery week until slaughter. Physicochemical parameters, such as brightness (L*), redness (a*), yellow (b*) color intensity, pH, tenderness (WBS), water holding capacity (CRA), presence of White Stripping, and Woody Breast were determined 24 hours postmortem (7, 8, 9 and 10 weeks). Final body weight, weight gain, feed consumption and feed efficiency did not increase in fast growth rate birds with greater L-carnitine inclusion (p<0.05). The inclusion of L-carnitine did not affect the physicochemical parameters; however, these were affected by growth rate and age at slaughter. Birds with rapid growth rates displayed meat that was lighter, less red, and less yellow, had lower pH values on week 7 that then increased with age (p<0.05). With both growth rates meat was more tender on week 8 (p<0.05).
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Date
2023-05-12
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Keywords
L-Carnitina, Pollos parrilleros, Crecimiento rápido, Crecimiento lento, Parámetros fisicoquímicos