EFFECT OF FEEDING DIFFERENT DIETS ON THE EXOCRINE PANCREATIC-SECRETION OF NITROGEN, AMINO-ACIDS AND ENZYMES IN GROWING PIGS

Five barrows were fitted with permanent pancreatic re-entrant cannulas to determine the influence of diet on exocrine pancreatic secretions in the weight range from 40 to 65 kg. The pigs were fed four diets. Di ets 1 and 2 were based on corn starch and contained 18.6 and 16.9 % cr ude protein (dry matter basis) from soybean meal and canola meal, resp ectively. Diets 3 and 4 contained 93-9 % wheat and barley, respectivel y. In the same order, the crude protein contents (dry matter basis) of these diets were 14.4 and 11.2 %, respectively. The experiment was ca rried out according to 4 x 4 Latin square design. Each experimental pe riod comprised 12 days. Following an adaptation period of 8 days, panc reatic juice was collected from 08:00 on day 9 to 08:00 h on day 10 an d from 08:00 on day 11 to 08:00 h on day 12. The pigs were fed twice d aily, at 08:00 and 20:00 h, 800 g each meal. Despite large differences , up to 23 %, between the overall mean values of the parameters that w ere measured there was no effect (P > 0-05) of diet on the volume of s ecretion of pancreatic juice, the pH and the secretion of total and TC A-precipitable nitrogen. Due to the high level of within-study variati on there was also no effect (P > 0.05) of diet on the secretion of ami no acids and the total activity of trypsin, chymotrypsin, alpha-amylas e and lipase in pancreatic juice.