Bravo AJA, Gómez RS, Ángeles ML

Idioma: Español/Inglés
Referencias bibliográficas: 33
Paginas: 411-422
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RESUMEN

Se evaluó la utilización de nitrógeno y energía en cerdos en finalización, alojados individualmente y en grupos de dos. Se usaron 32 machos castrados con un peso inicial de 68.6 ± 1.0 kg que fueron asignados al azar, en un diseño de bloques completos con arreglo en parcelas divididas en tres tratamientos: un cerdo alojado individualmente con libre acceso al alimento y 0.81 m² de espacio de piso (D1AL); dos cerdos alojados en grupo con libre acceso al alimento y 0.405 m² de espacio de piso/cerdo (D2AL); un cerdo alojado individualmente con consumo pareado con base en el consumo de los cerdos en D2AL y espacio de piso similar a D1AL (D1P). El experimento se dividió en dos periodos de recolección de excretas: días 1-4 (periodo 1) y 18-21 (periodo 2). Se tuvieron ocho repeticiones por tratamiento. El consumo de nutrimentos en el periodo 1 fue mayor en D1AL con respecto a D2AL y D1P (densidad × periodo, P ‹ 0.01); en el periodo 2, el consumo de nutrimentos fue mayor en D1AL, intermedio en D1P y menor en D2AL. La retención de nitrógeno (P ‹ 0.05) y de energía (P ‹ 0.10) en el periodo 1 fue similar entre densidades (interacción densidad × periodo); en el periodo 2 fue mayor en D1AL comparado con D2AL. Los cerdos alojados en grupos de dos con alimentación a libertad tuvieron menor consumo y retención de nutrimentos en la fase final de la prueba, probablemente como consecuencia del estrés crónico debido a la competencia por el alimento, complicado por la restricción de espacio disponible de piso.

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