The influence of soy oligosaccharides on apparent and true ideal amino acid digestibilities and fecal consistency in growing pigs.
Soybean oligosaccharides (raffinose and stachyose) have been sited as impairing nutrient digestibility and causing flatulence. Fourteen ideally cannulated pigs were used in an experiment to evaluate the influence of raffinose and stachyose on nutrient digestibility and fecal consistency. Semipurified diets containing soy protein as the only protein source and soy solubles, a byproduct of soybean processing, was used to increase the diet levels of raffinose and stachyose. The addition of alpha-galactosidase to the diets improved raffinose digestibility, but did not improve nitrogen or amino acid digestibilities with the exception of valine and tryosine. Fecal consistency was not affected by dietary treatment. The researchers concluded that soybean oligosacharides have only minor effects on digestibility in growing pigs when fed at levels used in this experiment.
Smiricky, M.R., and co-workers. 2001. The influence of soy oligosaccharides on apparent and true ideal amino acid digestibilities and fecal consistency in growing pigs. Abstract presented at the Midwestern Section of ASA and the Midwest Branch of ADSA 2001 Mtg., Des Moines, IA. Abstract #229.