ChileanJAR

Eighteen male Holstein-Friesian calves from 4 to 5 days old were used. They were allotted at random to the following groups until they reached 150 Kg: I. Milk replacer plus concentrate and plus hay. They were placed on a closed barn. II. The same as group I but placed on half-roofed pens. III. Milk replacer plus concentrate and plus pasture outdoor. Milk replacer was fed twice daily until 60 days old. In groups I and II animals were placed in individual pens. Concentrate was offered ad libitum during the first period and was further provided at a maximum of 2 Kg/animal/day. Groups I and II received hay and concentrate once a day in the morning and hay was given chopped during the whole experimental period. Each day they were provided with fresh water.
No differences (P < 0.01) were observed in average daily gains (Kg) between groups I and II, the lower being groups III (0.767; 0.792 and 0.672 respectively). Number of days until 150 Kg were the same in groups I and II and these were different with respect to group III (P < 0.01). There were no significative differences (P < 0.01) in hay intake. Daily cncentrate intake (Kg) was the same in groups I and II (1.015 and 0.957, respecively) versus 0.856 in group III, but these were the same when considering total intake.