| Plant & Animal Sciences and Biotechnology |
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| Effects of the dietary supplementation with fructooligosaccharides on the excretion of nitrogen and phosphorus in Miichthys miiuy fries |
| WU Tian-xing, SONG Zeng-fu, CAI Li-sheng, DING Xue-yan, YU Qing-sen |
| Shool of Science, Zhejiang University, Hangzhou 310027, China; School of Animal Sciences, Zhejiang University, Hangzhou 310027, China; Key Laboratory for Molecular Design and Nutrition Engineering in Ningbo City, Ningbo Institute of Technology of Zhejiang University, Ningbo 315100, China; Zhejiang Fisheries Technique Center, Hangzhou 310012, China |
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Abstract Effects of dietary supplementation with fructooligosaccharides on the excretion of nitrogen and phosphorus in Miichthys miiuy fries were investigated. Nine hundred Miichthys miiuy fries were divided into 3 groups, each with triplicates. The basal diet and the basal diet supplemented with carnitine groups were considered as the negative and positive controls respectively. Results showed that the nitrogen concentration in excreted feces decreased significantly in fries fed the diet supplementation with 1000×10−6 fructooligosaccharides and 200×10−6 carnitine (P<0.05). The ammonic-nitrogen concentration decreased significantly in the carnitine group only (P<0.05), indicating the decreasing tendency caused by the supplementation with fructooligosaccharides. Supplementation with both did not have significant effects on the concentration of phosphorus in feces of Miichthys miiuy fries.
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Received: 25 January 2005
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