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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 24, No. 2, 2006, pp. 95-107
Bioline Code: zt06009
Full paper language: English
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 24, No. 2, 2006, pp. 95-107

 es Uso estratégico de la caña de azöcar ( Saccharum officinarum check for this species in other resources ) en novillas mestizas gestantes
Freddy Espinoza, Patricia Argenti, Cristhian Carrillo, César Araque, Adolfo Torres y Alberto Valle

Resumen

Se lleví a cabo un experimento en la unidad experimental de bovinos del Centro Nacional de Investigaciones Agropecuarias, con la finalidad de evaluar el efecto del complementaciín con caña de azöcar durante el öltimo tercio de la gestaciín en novillas mestizas Holstein sobre el peso pre y post parto, intervalo entre parto (IPP), peso al nacer y producciín de leche. Se establecieron dos tratamientos: T1: pastoreo más alimento concentrado a razín de 1,5 kg/animal/día y T2: pastoreo más alimento concentrado más suministro de caña de azöcar enriquecida con örea a razín de 4 kg/animal/día. Se utilizaron 14 novillas con un peso inicial de 495 kg, las cuales se distribuyeron en forma aleatorizada a los tratamientos en la medida que llegaban al séptimo mes de preñez, pastoreando en forma conjunta en potreros de pasto bermuda ( Cynodon dactylon check for this species in other resources ) con una carga animal de 2 UA/ha/año. Se utilizí un diseño completamente aleatorizado donde cada animal representí una réplica (siete/tratamiento). Los resultados no mostraron diferencias en el peso al nacer de los becerros y en el peso pre y postparto (P>0,05), pero sí en la ganancia diaria de peso de las novillas (P<0,01). El IPP fue menor en T2 (P<0,05), así como se obtuvo una mayor producciín de leche en este öltimo tratamiento (1269 vs. 1634 L/animal/lactancia). El costo de la leche fue mayor para T2, pero el ingreso neto en T1 fue menor (US $ 516 vs. 619). Se concluye que el uso estratégico de la caña de azöcar como recurso energético en novillas previo al parto incide en una mayor producciín de leche por lactancia (1.269 vs. 1.634 kg/lactancia), disminuye el IPP (454 vs. 347 días) y mejora la ganancia de peso (669 vs. 956 g/animal/día).

Palabras-clave
Mestiza Holstein, IPP, producciín de leche, peso, caña de azöcar, gestaciín.

 
 en Strategic use of sugar cane ( Saccharum officinarum check for this species in other resources ) in dual purpose pregnant heifers
Freddy Espinoza, Patricia Argenti, Cristhian Carrillo, César Araque, Adolfo Torres y Alberto Valle

Abstract

It was carried out a trial in the experimental unit of the National Center of Agricultural Research to evaluate the effects of sugar cane supplementation in the last third period of gestation of dual purpose crossbred heifers on live weight of before and after parturition, calving interval, calving weight, and milk production. Animals (14), with a mean initial body weight of 495 kg, were randomly placed in two treatments: T1: grazing + 1.5 kg of concentrated feed/head/day and T2: grazing + 1.5 kg of concentrated feed/head/day + 4 kg of sugar cane with urea/head/day, as the animals approached to the seventh month of pregnancy. Grazing was on bermuda grass ( Cynodon dactylon check for this species in other resources ) with a carrying capacity of 2 animal units/ha/year. A complete randomly design was used, where each animal represented an experimental unit (seven per treatment), with a mean comparison through Tukey test. The results did not show significant differences (P>0.05) on calving weight and heifer live weights, before and after parturition. However, there was a significant difference (P<0.01) on heifer average daily gain. Calving interval was lower in T2 (P<0.05), but a higher milk production, with a mean of 1269 L/head/lactation, when it was compared to treatment T2 with a mean of 1634 L/head/lactation. Milk cost was higher for T2, but net income in T1 was lower with a mean of 516 and 619 US$, for T1 and T2, respectively. It can be concluded that sugar cane as energetic source in dual purpose crossbred heifers previous to parturition significantly affected animal response, such as higher milk production/lactation, lower calving interval, and improved body weight gain.

Keywords
Crossbred heifers, calving interval, milk production, bodyweight, sugar cane, parturition.

 
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Alternative site location: http://www.sian.inia.gob.ve/repositorio/revistas_ci/ZootecniaTropical/ztindice.htm

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