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| Effects of dietary Chinese gall on growth performanceand serum biochemical indices of tilapia |
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| DOI：10.16768/j.issn.1004-874X.2016.12.017 |
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| Abstract: |
| This experiment investigated the effects of dietary Galla Chinese（ CG） on growth performance and
serum biochemical indices of tilapia. A basal diet without adding CG extract and four test diets containing 0.02%，
0.04%，0.10 %，and 0.16 %（ w/w） of CG were prepared to feed five groups of fish in triplicate with an initial average
body weight of（ 40.0±0.5） g respectively. The feeding experiment was conducted in 15 re-circulating tank systems
（170 L each） for eight weeks. With the increase of CG content in feed，the weight gain rate（ WGR），specific
growth rate（ SGR） and condition factor（ CF） showed the similar trend with GC supplement in the feed. Compared
to that of control group，WGR in the group 0.04% increased from 91.01% to 120.36%，and SGR from 1.16 to 141 significantly（ P<0.05） with the feed coefficient（ FC） 1.39（ 1.66 in the control group），but CF showed no significant
difference，hepatosomatic index（HSI） was the lowest among experiment groups and control groups（ P<0.05），
white blood cells（WBC）was significantly lower than that of the control and other experiment groups（ P<0.05），
Changes of hemoglobin content and hematocrit were consistent with the changes in number of erythrocytes. In
the group adding 0.04% of CG，the values of serum glucose，total cholesterol were higher than those of the other
treatments（P<0.05） ，both the glutamic pyruvate transaminase value and alkaline phosphatase value declined .
There was no significant difference in the blood urea nitrogen of fish among all groups. The study suggested that CG
could stabilize liver cellular membrane，eliminate the adverse hepatic detriment from the artificial feed and 0.05%
extracts supplemented in basal diet had the potential to promote the growth of tilapia. |
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