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The effects of feed intake and purified cellulose on the endogenous ileal amino acid flow in growing pigs

Published online by Cambridge University Press:  09 March 2007

S. Furuya  and
Y. Kaji
S. Furuya
Affiliation:
Department of Animal Production, Kyushu National Agricultural Experiment Station, Nishigoshi, Kumamoto 861-11, Japan
Y. Kaji
Affiliation:
Department of Animal Production, Kyushu National Agricultural Experiment Station, Nishigoshi, Kumamoto 861-11, Japan
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Abstract

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The effects of level of feed intake (0.8, 1.2 and 1.6 kg/d) and body-weight of the pig (49 and 92 kg) in Expt 1, and dietary neutral-detergent fibre (NDF; 30, 60, 90, 120 and 150 g/kg) in Expt 2 on the endogenous ileal flow of amino acids (AA) and nitrogen were studied with protein-free diets into which purified wood cellulose was incorporated at the expense of maize starch. In Expt 1, one of the protein-free diets containing 90 g NDF/kg was used. Female pigs were fitted with a simple ‘T’ cannula at the terminal ileum. In Expt 1, the endogenous ileal AA and N flow, expressed as g/kg dry matter (DM) intake, decreased significantly (P < 0.05) with increasing DM intake, except for proline. By contrast, the values expressed as g/d remained constant. There was no significant difference in endogenous ileal flow (P > 0.05) between initial body-weights of 45 and 90 kg except for histidide, isoleucine, phenylalanine, threonine, valine and serine, in which the ileal flow determined at the higher body-weight was significantly higher (P < 0.05). In Expt 2, the effects of dietary cellulose levels on the endogenous ileal flow of AA and N were not significant (P > 0.05), although the values tended to increase as dietary cellulose levels increased for most AA and for N. It is concluded that the daily endogenous ileal flow of AA and N remains relatively similar at different DM intake and cellulose levels. Therefore, correction of apparent ileal digestibility of AA and N to the true ileal digestibility should be made with the endogenous ileal flow values expressed on a daily amount basis, not the values expressed on a DM intake basis

Keywords

Amino acidsEndogenous ileal flowPig
Type
Nutritional Effects of Complex Carbohydrates
Information
British Journal of Nutrition , Volume 68 , Issue 2 , September 1992 , pp. 463 - 472
Copyright
Copyright © The Nutrition Society 1992

References

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