EXOCRINE PANCREATIC SECRETIONS IN YOUNG-PIGS FED DIETS CONTAINING FABA BEANS (VICIA-FABA) AND PEAS (PISUM-SATIVUM) - CONCENTRATIONS AND FLOWS OF TOTAL, PROTEIN-BOUND AND FREE AMINO-ACIDS

Two experiments were carried out to investigate the effects of feeding diets containing faba beans and peas on the concentration, flow and c omposition of total, protein-bound and free amino acids (AA) in pancre atic juice collected from young pigs fitted with a pancreatic pouch re -entrant cannula. In Experiment 1, eight barrows, with an average init ial weight of 8.5 kg, were fed one of two semi-purified diets formulat ed to contain 200 g kg(-1) crude protein (CP) according to a completel y randomised design. In one of the diets, soya bean meal was the sole protein source; in the other diet, soya bean meal and faba beans (cv F ibro; dark-flowering) each supplied 50% of the dietary CP. In Experime nt 2, five barrows, with an average initial weight of 18.1 kg, were fe d one of two diets formulated to contain 150 g kg(-1) CP with peas (cv Ascona or cv Radley) as the sole protein source. There was no effect (P > 0.05) of the diet, 8 h sampling period or experimental period on the concentration (mM), composition (% and g 16 g N-1) and flow (mmol 24 h(-1)) of total, protein-bound and free AA or on the percentage of protein-bound AA in pancreatic juice. The concentrations of total, pro tein-bound and free AA were higher in pancreatic juice collected from younger pigs in Experiment 1 than in pancreatic juice collected from o lder pigs in Experiment 2. However, the daily flows of total, protein- bound and free AA in pancreatic juice were similar in both experiments . The percentages of protein-bound AA in pancreatic juice were similar in both experiments. In conclusion, the concentrations, compositions and flows of total, protein-bound and free AA in pancreatic juice were not affected by diet, 8 h sampling period or experimental period.