Prediction of apparent, standardized, and true ileal digestible total and reactive lysine contents in heat-damaged soybean meal samples
Document Type
Article
Publication Date
12-1-2012
Journal Title
Journal of Animal Science
ISSN
print: 0021-8812 electronic: 1525-3163
Keywords
pigs, swine
Disciplines
Meat Science
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.
Recommended Citation
J. C. Kim, B. P. Mullan, J. R. Pluske, Prediction of apparent, standardized, and true ileal digestible total and reactive lysine contents in heat-damaged soybean meal samples, Journal of Animal Science, Volume 90, Issue suppl_4, December 2012, Pages 137–139, https://doi.org/10.2527/jas.53819
