ORIGINAL PAPER
Exocrine pancreatic secretions in growing pigs fed
diets containing different levels of protein from
soyabean meal
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Department of Agricultural, Food and Nutritional Science,
University of Alberta,
Edmonton, T6G 2P5, Canada
Publication date: 1997-05-15
J. Anim. Feed Sci. 1997;6(2):207-217
KEYWORDS
ABSTRACT
Six barrows, average initial BW 20.2 ± 0.9 kg, were fitted with a pancreatic pouch re-entrant
cannula. Following a 14-d recuperation period, the pigs were fed two diets according to a crossover
design, twice daily. Two maize starch-based diets were formulated to contain 12 and 24% CP from
soyabean meal. The experiment consisted of 2 periods of 12 d each. The average BW at the start of
periods 1 and 2 were 24.0 ± 1.1 and 31.3 ± 2.6 kg, respectively. The average BW at the conclusion of
the experiment was 40.2 ± 1.6 kg. The daily volume of secretion was slightly higher (P<0.05) in pigs
fed the low compared with the high protein diet. There were no differences (P>0.05) in total protein
output in pancreatic juice although the protein concentration (g/l-1) was higher (P<0.05) in pigs fed
the high protein diet. There was no effect (P>0.05) of dietary CP level of the total activities (units
24 h-1) of chymotrypsin, trypsin, amylase and lipase. The specific activities (units l-1) of chymotrypsin
and amylase were higher (P<0.05) when the high protein diet was fed. An increase in BW augmented
(P<0.05) the secretion of volume of pancreatic juice, protein output and total activities of
chymotrypsin and lipase. In conclusion, there were no differences in total protein output and total
enzyme activities in pancreatic juice when the dietary CP content ranges from 12 to 24%.