Effects of variability in trypsin inhibitor content of soya bean meals on true and apparent ileal digestibility of amino acids and pancreas size in broiler chicks

Clarke, E ORCID: https://orcid.org/0000-0003-2784-6922 and Wiseman, J, 2005. Effects of variability in trypsin inhibitor content of soya bean meals on true and apparent ileal digestibility of amino acids and pancreas size in broiler chicks. Animal Feed Science and Technology, 121 (12), pp. 125-138.

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Abstract

Variability in the nutritional value of processed soya bean meal (SBM) and full fat soya bean (FFSB) currently restrict its use in diets for non-ruminant livestock. Two metabolism trials determined the amino acid digestibility and effect on pancreas size in young broilers of 8 commercially obtained products. Trypsin inhibitor (TI) values varied from 1.1 to 3.6mg/g but were all within the tolerated range of trypsin inhibitor activity (TIA). The results of the trials reported demonstrated that the coefficients of digestibility for individual amino acids varied widely between samples (e.g. coefficient of ileal apparent digestibility, CIAD, for lysine was from 0.755 to 0.884 for SBM and 0.778 to 0.848 for FFSB) but did not correlate with TIA levels, indicating other factors also affect amino acid digestibility of FFSB and SBM. Pancreas to body weight ratio (PBWR) increased with rate of soya inclusion in both the SBM (from 2.25 to 2.44g pancreas/kg body weight) and the FFSB (from 2.19 to 2.40g pancreas/kg body weight). The linear increase in pancreas size with increasing TIA intake suggested a dose dependent response that should be considered in feed formulation.

Item Type:	Journal article
Publication Title:	Animal Feed Science and Technology
Creators:	Clarke, E. and Wiseman, J.
Date:	2005
Volume:	121
Number:	12
Identifiers:	Number Type 10.1016/j.anifeedsci.2005.02.012 DOI
Divisions:	Schools > School of Animal, Rural and Environmental Sciences
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:03
Last Modified:	09 Jun 2017 13:17
URI:	https://irep.ntu.ac.uk/id/eprint/7001

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