Effect of body weight on ileal endogenous nitrogen and amino acid loss in PVTC-cannulated pigs

Abstract

Six castrated male pigs were fitted with post-valve caecal T cannulas (PVTC) and used to determine the endogenous ileal flow of nitrogen (ILE(N)) and amino acids (ILE(AA)) in pigs at 25.9 kg (SD 1.5) and 93.2 kg (SD 6.4) body weight (BW). Pigs were fed a nutritionally balanced purified casein-based diet twice daily. The ILE(N) (g N kg(-1) DM intake) was higher (P = 0.03) at low BW (1.41 vs. 0.86). The ILE(AA) g kg(-1) DM intake) for all essential and non-essential AA was higher (P<0.05) at the low BW. Despite BW effects on absolute ILE(AA) the relative proportion (g 16 g N(-1)) of individual AA in ileal digesta was similar at both BW's. The data indicates that the ILE(N) used to calculate standardized ileal digestibility (SID) values has to be adjusted for BW, while the relative proportions of individual AA could be kept constant. (C) 2010 Elsevier B.V. All rights reserved.

Keywords

Amino acids; Endogenous loss; Ileal digestibility; Nitrogen; Body weight; Pig

Published in

Livestock Science
2010, Volume: 134, number: 1-3, pages: 18-20 Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Åkerfeldt, Magdalena

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

• Camp, Karin

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

• Lindberg, Jan Erik

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Animal and Dairy Science
Veterinary Science


Publication identifier

DOI: https://doi.org/10.1016/j.livsci.2010.06.084

Permanent link to this page (URI)

https://res.slu.se/id/publ/59829