Flow of endogenous and exogenous nitrogen indifferent segmentsof the small intestine in pigs fed diets with soyabeanconcentrate, soyabean meal or rapeseed cake

Abstract

Six barrows of an average initial BW 27.51.2 kg were used. Each pig was fitted with two cannulas in different segments of the small intestine: pig 1 in the duodenum (CI) and upper jejunum (C2), pig 2 in C2 and the lower jejunum (C3), pig 3 in C2 and C3, pig 4 in CI and the terminal ileum (C4), pig 5 in C3 and C4, pig 6 in CI and C4. Pigs were also fitted with one catheter in the vena jugularis for blood sampling and with a second one in the arteria carotis for continuous infusion of 15 N-leucine (4.2 mg/kg7 5 BW/d). Pigs were used in a crossover design experiment with three treatments and three periods of digesta collection (36 h) and blood sampling (36 h). Maize starch-based diets that contained: soyabean concentrate (SC), a mixture of toasted and untoasted soyabean meal (mSBM) of a high trypsin inhibitor activity, or rapeseed cake (RC) of a high NDF