Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)

2005   Vol. 6B   No. 8   p.798-802

Effects of the dietary supplementation with fructooligosaccharides on the excretion of nitrogen and phosphorus in Miichthys miiuy fries

WU Tian-xing^†1, SONG Zeng-fu², CAI Li-sheng³, DING Xue-yan⁴, YU Qing-sen³

(¹Shool of Science, Zhejiang University, Hangzhou 310027, China)
(²School of Animal Sciences, Zhejiang University, Hangzhou 310027, China)
(³Key Laboratory for Molecular Design and Nutrition Engineering in Ningbo City, Ningbo Institute of Technology of Zhejiang University, Ningbo 315100, China)
(⁴Zhejiang Fisheries Technique Center, Hangzhou 310012, China)
^†E-mail: wutx@nit.net.cn
Received Jan. 25, 2005; revision accepted Mar. 30, 2005

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.

Key words: Fructooligosaccharides, Miichthys miiuy fries, Nitrogen, Phosphorus, Carnitine
doi:10.1631/jzus.2005.B0798             CLC number: S816.79