The objective of this work was to evaluate the weight gain, feed efficiency and carcass characteristics of dairy steers. Sixteen Holstein dairy steers with initial average age and weight of 20 months and 202,0 kg were used. The animals were divided into four groups. One group of animals was slaughtered at the beginning of the trial (AI) and three groups were ad libitum fed (AL-1, AL-2 and AL-3) and they were slaughtered when the individual weights of 250.0, 300.0 and […]

The objective of this work was to evaluate the effects of different forage levels in the diet on the body composition, net energy for maintenance and weight gain and net protein requirements for weight gain. Fifty-two pure Holstein bulls calves; 60 days old with initial average live weight (LW) of 78 kg were used. Eight reference animals were slaughtered at the beginning of the feeding trial. Another group of eight animals were fed diet with 90% of forage and 10% […]

This work was to evaluate the effects of different forage levels in the diet on the efficiency of metabolizable energy (ME) utilization for maintenance and weight gain, and the requirements of ME, total digestible nutrients (TDN) and metabolizable protein (MP). Forty-four pure Holstein bulls calves, 60 days old with initial average live weight (LW) of 78 kg were used. Eight reference animals were slaughtered at the beginning of the feeding trial. The remaining 36 animals were allotted in the treatments […]

The objective of this work was to evaluate the effects of different forage levels in the diet on the net and dietary calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K) and sodium (Na) requirements. Forty-four pure Holstein bulls calves, 60 days old with initial average live weight (LW) of 78 kg were used. Eight reference animals were slaughtered at the beginning of the experiment, to estimate the initial empty body weight (EBW) and initial body concentrations of Ca, P, Mg, […]