[en] The aim of this study was to compare ileal and faecal digestibilities to gas production in syringes, preceded or not by an in vitro enzymatic digestion of two pig diets containing different amounts of non starch polysaccharides (NSP). In vivo, only nitrogen faecal digestibility differed between the two diets. Their enzymatic pre-digestion led to a higher gas production after 16 h of incubation in syringes for the diet with the lowest N faecel digestibility but not without pre-digestion. We may conclude that an in vitro pre-digestion before incubation in syringes is necessary to evaluate feed fermentescibility in pig large intestine.
