| Abstract: | Three female pigs of about 50 kg liveweight were provided with re-entrant canulas in the upper and lower sections of the small intestine and were catheterized to collect urine and blood (vena jugularis). After feeding once 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 canulas and to separate aliquote portions thereof 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 were found to agree fairly well. 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 even chyme flow some eight hours after feeding. At the end of the small intestine almost constant chyme passage rates were observed over the whole experimental period. |
