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- Title
Effect of different amount of Rhodopseudomonas palustris feed additive on Tilapia mossambica breeding.
- Authors
LI Jian-bin; HE Wei; LI Da-lie; LYU Min
- Abstract
[Objective]The experiment was conducted to study the effect of different amount of Rhodopseudomonas palustris feed additive on tilapia breeding, in order to provide references for mass-scale, high-density and healthy cultivation of tilapia. [Method]Tilapia was fed with Rhodopseudomonas palustris(⩾5x109living bacteria/mL) additive at the rate of 3%, 5% and 7%, respectively for 160 days. Water quality of the culture pond was tested for six times. In the end, yield per unit, mean average weight, survival rate and feed coefficient of tilapia were studied and evaluated. [Result]Compared with the control, mean concentration of ammonia nitrogen, nitrite and COD were lower in other treatments P0.05, the same as below). Yield per unit, mean average weight, survival rate of tilapia in other treatments were obviously higher than those of the control, while feed coefficient was higher in the control. Yield per unit, mean average weight, survival rate of tilapia increased by 15.52%-34.67%, 9.10%-18.18% and 5.87%-13.97%, respectively. However, feed coefficient descended by 9.42%-21.52%. Compared comprehensively, the treatment of 5% Rhodopseudomonas palustris additive showed the best effect with the highest unit yield. [Conclusion]With proper amount of Rhodopseudomonas palustris additive, there was less hazardous substance, better water quality, stronger immunity, higher survival rate, lower feed coefficient and more economic returns. However, the growth of tilapia would be inhibited by worse appetite when the amount was over 5%. Therefore, the optimal amount of 5%Rhodopseudomonas palustris additive should be demonstrated and extended in large area in the tilapia-cultured region.
- Subjects
RHODOPSEUDOMONAS palustris; MOZAMBIQUE tilapia; FISH breeding; AMMONIA compounds; FISH ponds
- Publication
Journal of Southern Agriculture, 2014, Vol 45, Issue 9, p1694
- ISSN
2095-1191
- Publication type
Article
- DOI
10.3969/j:issn.2095-1191.2014.9.1694