wet. Grass growth was poor, pastures became poached and grazing management, particularly of the bulls, was diffi- cult. Consequently, the bulls were housed on August 25th while the steers remained at pasture until November 4th. At the time of housing, six bulls (two per breed type) were removed from the study because of injury or lameness. The remaining 54 bulls were accommodated in pens of 6 by breed type (3 pens per breed type) in a slatted floor shed giving 3 replicates for each breed type for feed intake measurement up to the time of Light slaughter weight. Within breed type the penning arrangement was that one pen had 6 Light slaughter weight animals. A second pen had 6 Heavy slaughter weight animals and the third pen had 3 Light and 3 Heavy slaughter weight animals. Thus, after disposal of the Light slaughter weight animals there were still 2 replicates per breed type for feed intake measurement, one with 6 animals and one with 3 animals confined to half the pen area. After housing, bulls were offered a total mixed ration (TMR) ad libitum of grass silage (chemical composition: DM 189 g/kg, in vitro DM DMD
745 g/kg, CP 148 g/kg, ash 89 g/kg, pH 4.1, 0.77 UFV) and cattle concentrates, with the proportion of concentrates gradually increasing over a three week period to 0.5 on a DM basis. This ration was offered unchanged until time of housing of the steers. The steers were housed in a slatted floor shed fitted with Calan-broad bent electronic doors so that individual feed intake recording could take place. They were gradually adapted to the same TMR as the bulls in the weeks following housing and then the concentrate proportion was gradually increased to 0.67 for both genders. Thereafter, the ration composition remained constant and was fed continuously up until time of slaughter. The DM intake of the bulls was recorded twice weekly on a per pen basis and feed refusals were discarded twice weekly. Steers DM intakes were recorded daily and feed refusals were discarded twice weekly.
wet. Grass growth was poor, pastures became poached and grazing management, particularly of the bulls, was diffi- cult. Consequently, the bulls were housed on August 25th while the steers remained at pasture until November 4th. At the time of housing, six bulls (two per breed type) were removed from the study because of injury or lameness. The remaining 54 bulls were accommodated in pens of 6 by breed type (3 pens per breed type) in a slatted floor shed giving 3 replicates for each breed type for feed intake measurement up to the time of Light slaughter weight. Within breed type the penning arrangement was that one pen had 6 Light slaughter weight animals. A second pen had 6 Heavy slaughter weight animals and the third pen had 3 Light and 3 Heavy slaughter weight animals. Thus, after disposal of the Light slaughter weight animals there were still 2 replicates per breed type for feed intake measurement, one with 6 animals and one with 3 animals confined to half the pen area. After housing, bulls were offered a total mixed ration (TMR) ad libitum of grass silage (chemical composition: DM 189 g/kg, in vitro DM DMD745 g/kg, CP 148 g/kg, ash 89 g/kg, pH 4.1, 0.77 UFV) and cattle concentrates, with the proportion of concentrates gradually increasing over a three week period to 0.5 on a DM basis. This ration was offered unchanged until time of housing of the steers. The steers were housed in a slatted floor shed fitted with Calan-broad bent electronic doors so that individual feed intake recording could take place. They were gradually adapted to the same TMR as the bulls in the weeks following housing and then the concentrate proportion was gradually increased to 0.67 for both genders. Thereafter, the ration composition remained constant and was fed continuously up until time of slaughter. The DM intake of the bulls was recorded twice weekly on a per pen basis and feed refusals were discarded twice weekly. Steers DM intakes were recorded daily and feed refusals were discarded twice weekly.
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