F. Irawan, S.P. Quigley, T. Panjaitan, S.P. Poppi and Dahlanuddin
Lifetime productivity of female cattle is influenced by age at first calving. Managing pre- and post-pubertal growth of heifers is important in establishing this lifetime productivity. Heifers that are subjected to nutrient restriction after weaning are typically older at puberty and have lower pregnancy rates than those that are well grown over this period. Bali cattle (Bos javanicus) are indigenous to Indonesia and are most commonly reared by smallholder farmers across the eastern islands. The age at first calving in villages across eastern Indonesia is typically 36 months of age, with lighter maiden heifers having low birth weight calves (12 kg) (Talib et al., 2003). The objective of this experiment was to investigate the influence of post-weaning diet on age and liveweight (LW) of Bali heifers at the detection of first oestrus and subsequent growth.