The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
01/Jan/2010
Ricardo Zambarda Vaz, José Fernando Piva Lobato
DOI: 10.1590/S1516-35982010000100019
The objective of the study was to evaluate, for two consecutive years, the weaning age effect on the reproductive performance of 121 Bradford heifers mated at 13/15 months old. Two weaning ages were assessed: at 77 days, early weaning (EW) or at 147 days, conventional weaning (CW). The heifers were born in 2004 (66) and 2005 (55). After weaning, heifers were kept initially on cultivated summer pasture (Pennisetum americanum, L.) and afterward on cultivated winter/spring pasture (Avena strigosa Schreb plus […]
Keywords: body condition; Bradford; early weaning; pregnancy; weight gain