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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 21, No. 2, 2002, pp. 119-131
Bioline Code: zt03008
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 21, No. 2, 2002, pp. 119-131

 en Supplementation of early weaned calves with Gliricidia sepium check for this species in other resources and concentrate
Merbis Tesorero y Jorge Combellas

Abstract

In order to evaluate some feeding strategies after weaning of calves receiving a base diet of chopped forage, an experiment was carried out to compare two levels of concentrate of 1 and 2 kg/day, with or without the supply ad libitum of gliricidia ( Gliricidia sepium check for this species in other resources ) foliage, and its effect on intake and live weight gain (LWG). Twenty four Bos indicus check for this species in other resources x Bos taurus check for this species in other resources calves were used, stalled in individual pens and the intake of diet components was determined from birth to weaning, at 17 weeks old, and during the following 12 weeks, when treatments were applied. LWG were 0.54 ± 0.20 kg/day before weaning and 0.49 and 0.68 kg/day (P<0.01) after weaning in treatments with 1 and 2 kg/day concentrate. The supply of gliricidia did not improve LWG, as a consequence of its low intake, of 0.30 and 0.47 kg/day, during the two months after weaning, when the animals had 5 and 6 months old. However, intake increased during the last month of the trial, with an estimated supply of metabolizable energy and crude protein similar to the treatment with 2 kg/day concentrate. It was concluded that the supplementation with gliricidia foliage after two months of early weaning is insufficient to substitute the use of 1 kg/day concentrate.

Keywords
Calves, Weaning, Gliricidia sepium check for this species in other resources , Intake, Live weight gain

 
 es Suplementación de becerros de destete temprano con Gliricidia sepium check for this species in other resources y concentrado
Merbis Tesorero y Jorge Combellas

Resumen

Con la finalidad de examinar algunas estrategias de manejo alimenticio después del destete de becerros consumiendo una dieta base de forraje de corte, se realizó un experimento en el cual se compararon dos niveles de concentrado, 1 y 2 kg/día, con o sin la oferta de follaje de gliricidia ( Gliricidia sepium check for this species in other resources ), y su efecto sobre el consumo y las ganancias de peso (GDP). Se utilizaron 24 becerros Bos indicus check for this species in other resources x Bos taurus check for this species in other resources , alojados en puestos individuales y con control del consumo de los componentes de la dieta desde el nacimiento hasta el destete a las 17 semanas y posteriormente por 12 semanas mientras se aplicaron los tratamientos. Las GDP antes del destete fueron de 0,54 ± 0,20 kg/día y después del destete pasaron a 0,49 y 0,68 kg/día (P<0,01) en los tratamientos con 1 y 2 kg/día de concentrados. El suministro de gliricidia no mejoró las GDP, como consecuencia de su bajo consumo diario de 0,30 y 0,47 kg MS durante los dos meses posteriores al destete, el consumo de gliricidia aumentó durante el último mes del ensayo con un aporte estimado de energía metabolizable y proteína cruda similar al tratamiento con 2 kg/día de concentrado. Se concluye que la suplementación con follaje de gliricidia durante los dos primeros meses después del destete temprano es insuficiente para sustituir el empleo de 1 kg/día de concentrado.

Palabras-clave
Becerros, Destete, Gliricidia sepium check for this species in other resources , Consumo, Ganancia de peso.

 
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