Protein Sparing Effect of Carbohydrate on Growth Performance, Digestion Ability of Common Carp (Cyprinus carpio) at Different Feeding Frequencies

摘要

The present study suggests that the growth and the digestive abilities of midgut of common carp are significantly affected by dietary carbohydrate levels and feeding frequencies. An increase of feeding frequency from 2 to 4 meal/d can improve the growth and intestinal digestive enzyme activity of common carp and enhance the carbohydrate utilization and boost the protein-sparing effect of dietary carbohydrate. Meanwhile, increasing carbohydrate level from 5 to 10% leads to the improvements of protease and amylase activities of midgut. Therefore, it is recommended that common carp should be fed at 4 meal/d, and the carbohydrate content of the dietary can be appropriately increased to 5-10%.