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Factors affecting voluntary feed intake in pigs. I. The effect of digestible energy content of the diet on the intake of castrated male pigs housed in holding pens and in metabolism crates

Published online by Cambridge University Press:  02 September 2010

D. J. A. Cole ,
J. E. Duckworth  and
W. Holmes
D. J. A. Cole
Affiliation:
Wye College (University of London), Ashford, Kent
J. E. Duckworth
Affiliation:
Wye College (University of London), Ashford, Kent
W. Holmes
Affiliation:
Wye College (University of London), Ashford, Kent
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Extract

1. The voluntary feed intakes of pigs fed on diets having calculated digestible energy contents of 2,970, 3,356, 3,630 and 3,910 kcal/kg. dry matter were measured over four periods from 38 to 105 kg. live-weight.

2. The pigs achieved similar daily digestible energy intakes regardless of the digestible energy content of the diet.

3. When housed in metabolism crates pigs ate less than when housed in holding pens and the difference was greater than would be expected solely from the reduced exercise of the pigs in crates.

4. Daily digestible energy intake was 575 kcal/kg. live-weight 0.675 when the pigs were in holding pens. The daily digestible energy intake of pigs in metabolism crates increased less with live-weight.

5. The use of metabolism crates to obtain digestibility coefficients and values for nitrogen retention to be applied to animals housed under other conditions is discussed in relation to the differences found in apparent digestibility coefficients, feed intake and growth rates between pigs in crates and in holding pens.

Type
Research Article
Information
Animal Production , Volume 9 , Issue 2 , May 1967 , pp. 141 - 148
Copyright
Copyright © British Society of Animal Science 1967

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References

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