Effects of non-starch polysaccharides enzyme, phytase and citric acid on activities of endogenous digestive enzymes of tilapia (Oreochromis niloticus x Oreochromis aureus)
文献类型: 外文期刊
作者: Li, J. S. 1 ; Li, J. L. 2 ; Wu, T. T. 2 ;
作者机构: 1.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing Z10095, Peoples R China
2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi, Peoples R China
关键词: citric acid;digestive enzyme;non-starch polysaccharides enzyme;phytase;tilapia
期刊名称:AQUACULTURE NUTRITION ( 影响因子:3.497; 五年影响因子:3.78 )
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收录情况: SCI
摘要: Non-starch polysaccharides (NSPs) enzyme, phytase and citric acid have been shown to increase digestibility in pigs, poultry and some fish. To examine their roles in digestion in tilapia (Oreochromis niloticus x Oreochromis aureus), the present study was designed to evaluate their effects on activities of a number of endogenous digestive enzymes in tilapia. Neither NSPs enzyme (1 g kgp#) nor phytase (1 g kgp#) affected the activities of protease in digestive organs. In contrast, NSPs enzyme increased the activities of amylase in the hepatopancreas and intestine by 11.4% and 49.5%, respectively, while phytase (1 g kgp#) increased the activities of amylase in the hepatopancreas and intestine by 14.0% and 24.1%, respectively. Citric acid (10 g kgp#) increased the activities of protease in stomach by 29.6%, but reduced the activities of protease in the intestine by 35.1%. Citric acid increased the activities of amylase in the hepatopancreas and intestine by 30.7% and 29.4%. Lipase activities were not affected by NSPs enzyme, phytase or citric acid. Above results suggest that NSPs enzyme, phytase and citric acid primarily influence the activities of amylase in digestive tract of tilapia.
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