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The nutrition of the early-weaned calf VIII. The effect on nitrogen retention of diets containing different levels of fish meal

Published online by Cambridge University Press:  02 September 2010

T. R. Preston ,
F. G. Whitelaw ,
N. A. MacLeod  and
Euphemia B. Philip
T. R. Preston
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
F. G. Whitelaw
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
N. A. MacLeod
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
Euphemia B. Philip
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
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Summary

1. All-concentrate diets containing four different levels of Peruvian (anchovy) fish meal and varying in crude protein content from 14·8% to 21·7% in dry matter were given ad libitum to 8 early-weaned Friesian calves over a live-weight range of 60–100 kg.

2. Nitrogen retention was significantly higher on diets containing 21·7% and 19·4% crude protein in dry matter than on diets with 16·8% and 14·8% crude protein. Nitrogen retention as a percentage of dietary intake appeared to be less on the diet with 21·7% crude protein in dry matter than on the other diets.

3. From these data it was calculated that the digestible crude protein requirement for a calf of 82 kg. live-weight gaining at 909 g. daily is between 270 and 340 g.

Type
Research Article
Information
Animal Production , Volume 7 , Issue 1 , January 1965 , pp. 53 - 58
Copyright
Copyright © British Society of Animal Science 1965

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References

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