Investigation of the nitrogen and amino acid absorption in swine. 1

Three female pigs of about 50 kg live weight were provided with re-entrant cannulas in the upper and lower part of the small intestine and were catheterized in order to collect urine and blood (vena jugularis). After single intake of the experimental diet containing 15N-labelled fat extracted dry curd as protein component it was possible to determine on two days the chyme passed through the cannulas and to separate aliquote portions for analysis. The cellulose contained in the food was used as indicator for the passage rate of the chyme in the small intestine. The passage rates in the small intestine calculated from the amounts of cellulose and chyme showed a good agreement. The passage rates in the upper part of the small intestine were characterized by strongly marked short-time peaks right after feed intake, and by periods of relatively steady chyme flow beginning about eight hours after feeding. At the end of the small intestine almost constant chyme passage rates were observed over the whole experimental period. (author)