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The protein requirements of rapidly growing steers

Published online by Cambridge University Press:  02 September 2010

M. Kay ,
H. B. Bowers  and
G. McKiddie
M. Kay
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
H. B. Bowers
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
G. McKiddie
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
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Extract

1. Two growth trials and digestibility trials were carried out with 54 steers given diets containing either 11%, 14% or 17% crude protein in the dry matter and the same concentration of metabolisable energy.

2. There were no significant differences in either dry-matter intake or live-weight gain by the steers given the diets containing 14% or 17% crude protein. Dry-matter intake was lower for the steers given the diet containing 11% crude protein and their live-weight gain was lower up to 250 kg live weight. Beyond 250 kg live weight their live-weight gain was similar to that of the steers on the two other treatments.

3. Both dry-matter digestibility and apparent nitrogen digestibility were lowest for those steers given the diet containing 11% crude protein.

Type
Research Article
Information
Animal Production , Volume 10 , Issue 1 , February 1968 , pp. 37 - 42
Copyright
Copyright © British Society of Animal Science 1968

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References

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