Carter (1998) did
not find any effect on salmon growth performance by supplementing
a diet containing soybean meal at 47% by weight with phytase and a
multi-enzyme containing both carbohydrase and proteolytic enzymes.
These contradictory results suggest that the effects of exogenous
carbohydrase enzymes may depend on the level of inclusion of plant
feedstuffs in the diet and/or the mixture of different enzymes used