Effects of vegetable protein enzymatic hydrolysates on growth, hepatopancreas and intestine development, digestive enzymes of Jian carp cyprinus carpio Jian

900 carps with an average initial weight of 9.18±0.21 g, were divided into 6 groups, feeding diets which were formulated with vegetable protein enzymatic hydrolysates (VPEH) 0%、20%、40%、60%、80%、100% of intact protein respectively for 60d. The results indicated that when the VPEH in diet protein is 40%, the weight gain, feed intake, protein and ash productive values were higher than other groups, the feed conversion ration was lower. Intestinal weight and folds height, lipase, alkaline phosphatase and Na⁺,K⁺-ATPase activities enhanced with VPEH levels increasing, until to 60%(P<0.05). When VPEH was over 60%, the weight gain、protein and ash productive values, enzymes activities and folds height of intestine decreased(P<0.05), while the glutamine-oxaloacetate transaminase in hepatopancrease、ammonia level in plasma and lipid productive values increased (P<0.05). It suggested that VPEH could promote Jian carp cyprinus carpio Jian growth, hepatopancreas and intestine development, increase digestive enzymes activities.