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Selection of dietary lysine and threonine concentration of growing pigs

Published online by Cambridge University Press:  24 November 2017

R. A. C. Fairley ,
S. P. Rose  and
M. F. Fuller
R. A. C. Fairley
Affiliation:
Harper Adams College, Newport, Shropshire TF10 8NB
S. P. Rose
Affiliation:
Harper Adams College, Newport, Shropshire TF10 8NB
M. F. Fuller
Affiliation:
Rowett Research Institute, Bucksburn, Aoerdeen AB2 9SB
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Extract

The aim of these trials was to discover if growing pigs can select an appropriate mixture of two feeds differing only in the level of one amino acid.

A trial was conducted with 40 male pigs, with an initial mean weight of 13.1 kg. A basal low lysine feed was formulated with 172 g digestible protein (DP)/kg feed which was supplemented with synthetic lysine. The resulting feeds were similar in all respects except digestible lysine (DL) level, which was 25 (L), 50 (ML), 109 (MH) and 141 (H) g/kg DP.

A second trial was carried out with threonine, using 48 male pigs with an initial mean weight of 11.94 kg. The same basal feed was supplemented with synthetic lysine to 70 g DL/kg DP and then supplemented with varying amounts of synthetic threonine to form four feeds with digestible threonine (DT) levels of 29 (L), 35 (ML), 55 (MH) and 68 (H) g/kg DP.

Type
Ruminant Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 195
Copyright
Copyright © The British Society of Animal Production 1993

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