Effects of supplemental feeding of crossbred calves on their weaning weight and on pregnancy rate of their multiparous Nelore dams

• Autores: Jair de Araújo Marqués, Ivanor Nunes do Prado, Rogério Ernesto da Silva, Fernando Zawadzki, Andréa Machado Groff
• Localización: Archivos Latinoamericanos de Producción Animal, ISSN 1022-1301, ISSN-e 1022-1301, Vol. 13, Nº. 3, 2005, págs. 92-96
• Idioma: inglés
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• Resumen

  • This experiment used a simple random design with two treatments and 87 replicates, with the objective of evaluating the performance of crossbred calves (¿ Nelore x ¿ Red Angus) with or without supplemental concentrate feeding from birth to weaning and also the effect on subsequent reproductive efficiency of the dams during a 210-d period. The animals grazed stargrass (Cynodon nlemfuensis) and the concentrate supplement was formulated with 20% CP and 70% TDN. Supplementation increased weaning weight by 9.4% over non-supplementation. No significant difference was observed between the two groups of dams in pregnancy rate, but those whose calves were supplemented showed 10.7% advantage in this criterion. Under the conditions of this experiment supplementation of calves promoted faster weight gain to weaning and tended to benefit the dams also.