Primary Study On Utilization Of Dietary Digestible Carbohydrate By Jade Perch Scortum Barcoo

This experiments used glucose, sucrose, dextrin and starch as the carbohydrate source to prepare nine iso-protein and iso-lipid experimental diets by orthogonal design of L9(34), another four diets contained 0%,6%,23% and 40% of digestible carbohydrate were also fed to Jade Perches(Scortum barcoo), respectively. Utilization and postprandial metabolism of digestible carbohydrate by Jade Perch were studied after feeding.The results showed that Jade Perch had the best growth performance and feed utilization by using starch, it was the most important factor, followed by dextrin,sucrose and glucose. With the increase of digestible carbohydrate levels in diets, the growth performance and feed utilization increased firstly and then decreased; The effects of starch on crude lipid in muscle, plasma glucose and triglyceride,liver glycogen,hepatic index,amylase was the most significant, they all rose with the increase of digestible carbohydrate levels; dextrin had the most significant effect on PK activity; the effect of sucrose on Sucrase,SOD and MDA was most significant, while glucose on SOD and MDA in blood plasma was most significant. The physiological parameters increased firstly and then decreased after feeding, plasma glucose and triglyceride,liver glycogen,amylase,protease and glycolytic enzyme increased with the levels of dietary digestible carbohydrate increase; plasma glucose and triglyceride,GK and PK reached to peak at 12h, liver glycogen was at 24h, amylase activity was highest at 6h. Conclution: Jade Perch utilized dextrin and starch better than glucose and sucrose, high digestible carbohydrate could cause physiological load which were not benefit to health growth. Jade Perch could alleviate it through glycogen accumulation,regulation of amylase and glycolytic enzyme activities. Growth performance and feed utilization of Jade Perch had the best effect at the level of 8% dextrin and starch, 6% sucrose, 1% glucose (total digestible carbohydrate at 23%), namely Groupâ…¡, D2C2B2A1 combination of experiment, meanwhile the health was the best.