Performance of beef heifers of the various genetic groups, supplemented or not, in coastcross pastures.
No hay miniatura disponible
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
Descripción
The objective of this was to determine whether perfomance of beef heifrs of different genetic groups was affected by breed x nutriotional environment interactions. Sixty four weaned heifrs, 16 per genetic group: 1/2 angus + 1/2 Nellore (AN), 1/2 Canchim + 1/2 Nellore (CN), 1/2 Simmental + 1/2 Nellore (SN) and pure Nellore ((NE), were used with or without 3.0KG of concentrate. animal . day in a fertilized coastcross pasture under ratational grazing system. There were effects of genetic group and supplentation (P<0.05) on the weight and age at first estrusbut there was no interaction betweem then. In a rotational grazing sytem wth 4000kg of available dry matter per hectare with 13% of crude protein, the crossbres AN, supplemented or not was more precocious (111 days) than Nellore heifers, showing the firts estrus at 356 days of age and 324kg of live weight.
Palabras clave
Supplementation, Beef catle, Ageat pubert, Pastejo rotacionado, suplementacao, Idade de purbedade, Cynodon Dactylon, rotational grazing