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Prediction of apparent, standardized, and true ileal digestible total and reactive lysine contents in heat-damaged soybean meal samples

Kim, J.C., Mullan, B.P. and Pluske, J.R.ORCID: 0000-0002-7194-2164 (2012) Prediction of apparent, standardized, and true ileal digestible total and reactive lysine contents in heat-damaged soybean meal samples. Journal of Animal Science, 90 (Supplement 4). pp. 137-139.

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Link to Published Version: http://dx.doi.org/10.2527/jas.53819
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Abstract

Forty-two individually housed entire male pigs weighing 37.5 ± 0.15 kg (mean ± SEM) were used in a randomized block design having 7 dietary treatments (n = 6). The dietary treatments were 5 semisynthetic diets containing 350 g/kg of soybean (Glycine max) meal (SBM) with variable heat treatments (0, 7, 14, 21, and 28 min autoclaved at 135°C), a protein free (N-free) diet, and an enzymatically hydrolyzed casein (EHC) diet. Heat treatment linearly decreased (P < 0.001) total Lys content from 27.5 to 19.2 g/kg and reactive Lys content from 23.4 to 11.7 g/kg. Apparent, standardized, and true ileal digestible total and reactive Lys contents linearly decreased (P < 0.001) with increasing severity of heat treatment and were accurately predictable (P < 0.001) from total and reactive Lys content in heat-damaged SBM. These data indicate that excessive heat processing of SBM reduced both the content (P < 0.001) and digestibility (P < 0.001) of total and reactive Lys in SBM.

Item Type: Journal Article
Murdoch Affiliation: School of Veterinary and Biomedical Sciences
Publisher: American Society of Animal Science
Copyright: © 2012 American Society of Animal Science
URI: http://researchrepository.murdoch.edu.au/id/eprint/15755
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