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Effect of feeding whole and rolled barley to steers in the morning or afternoon in diets containing differing proportions of hay and grain

Published online by Cambridge University Press:  02 September 2010

G. W. Mathison ,
D. F. Engstrom  and
D. D. Macleod
G. W. Mathison
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, Canada, T6G 2P5
D. F. Engstrom
Affiliation:
Animal Industry Division, Alberta Agriculture, O.S. Longman Building, 6909 116 Street, Edmonton, Alberta, Canada T6H 4P2
D. D. Macleod
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta, Canada, T6G 2P5
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Abstract

A 2 × 2 × 2 factorial experiment was conducted with 128 growing-finishing steer calves to examine the effects of feeding whole v. rolled barley in diets containing either a constant proportion of concentrate (0·67) or proportionately 0·33 concentrate for 56 days followed by 0·90 concentrate for 83 days, with the concentrate being given at either 08.00 or 15.30 h. Steers given hay at 08.00 h and concentrate at 15.50 h grew proportionately 0·05 faster (P < 0-05) and had better dry matter (DM): gain ratios (P < 0·05) during the first 56 days than those given concentrate at 08.00 h and hay at 09.00 h. By the end of the trial steers fed at 15.50 h had similar daily gains to steers fed at 08.00 h but required proportionately 0·02 less DM: gain (P <0·05). No significant difference in gain was detected between steers given whole (1·30 kg/day) or rolled (1·38 kg/day) barley, but those given whole barley ate proportionately 0-08 more DM daily and had a proportionately 0-15 poorer DM: gain ratio (P < 0-05). The digestibility of diets containing whole grain was reduced (P < 0-05). Thirty-six steers given whole barley bloated compared with nine given rolled barley (P < 0·05). No significant differences were found either in DM intake or in final proportion of concentrate in the diet between steers given the diet containing proportionately 0·67 concentrate throughout the feeding period and those given the variable concentrate diets. There was a trend for DM: gain ratios to be poorer for steers given the constant proportion of concentrate (6·89 v. 6·65).

Keywords

barleyliveweight gainsmeal patternsprocessingsteers
Type
Papers
Information
Animal Production , Volume 53 , Issue 3 , December 1991 , pp. 321 - 330
Copyright
Copyright © British Society of Animal Science 1991

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