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首页> 外文期刊>Aquaculture International >Biofloc-based co-culture systems of Nile tilapia (Oreochromis niloticus) and redclaw crayfish (Cherax quadricarinatus) with different carbon-nitrogen ratios
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Biofloc-based co-culture systems of Nile tilapia (Oreochromis niloticus) and redclaw crayfish (Cherax quadricarinatus) with different carbon-nitrogen ratios

机译：基于Biofloc的基于尼罗基亚（Oreochromis Niloticus）的共培养系统，以及具有不同碳 - 氮比的红鳞鳞茎（Cherax Quadricarinatus）

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This study aims to evaluate the production performance of biofloc-based co-culture systems of Nile tilapia and redclaw crayfish with varying carbon-nitrogen ratios (C/N). The experiment was conducted for 80 days in plastic-lined ponds with dimensions of 1 x 1 x 0.6 m. Two biofloc systems with two C/N ratios (10 and 15), using molasses as the carbon source and a control system without molasses were compared. Mixed-sex Nile tilapia with an initial average body weight of 7.00 +/- 0.25 g were stocked at a density of 30 fish m(-2). After 30 days of culture, redclaw crayfish with initial average body weight of 11.50 +/- 0.55 g were added to the culture system at a density of 10 crayfish m(-2). There were no significant differences in total animal biomass or total weight gain between treatments (P > 0.05). The total feed and overall feed conversion ratio (FCR) differed significantly (P < 0.05) between the biofloc systems and the control. Total ammonia nitrogen (TAN), nitrite nitrogen (NO2-N) and nitrate nitrogen (NO3-N) concentrations in biofloc systems with a C/N ratio of 15 were generally lower than those of other treatments. Dissolved oxygen concentrations decreased with the increase in the culture period in (4.13-4.40 mg L-1). Based on the results of this study, it can be concluded that an increase in the C/N ratio has positive effects on the feed utilization efficiency and water quality in biofloc-based tilapia-redclaw crayfish co-culture systems.
机译：本研究旨在评估基于生物植物的基于生物植物的尼罗巴皮亚和Redclaw小龙虾的生产性能，具有不同的碳 - 氮比（C / N）。实验在塑料衬里池塘中进行80天，尺寸为1×1×0.6米。使用糖蜜作为碳源的两种具有两个C / N比率（10和15）的Biofloc系统，并进行了没有糖蜜的控制系统。初始平均体重为7.00 +/- 0.25g的混合性尼罗亚醛醛含有30/2的密度储存。在培养30天后，以10个小龙虾M（-2）的密度加入初始平均体重11.50 +/- 0.55g的Redclaw小龙虾。在治疗中的总动物生物质或总体重增加没有显着差异（P> 0.05）。 Biofloc系统与对照之间的总饲料和总饲料转换比（FCR）显着不同（P <0.05）。具有C / N比为15的生物氟化裂解系统中的总氨氮（TAN），亚硝酸盐氮（NO2-N）和硝酸氮氮（NO3-N）浓度通常低于其他处理。溶解氧浓度随培养期（4.13-4.40mg L-1）的增加而降低。基于本研究的结果，可以得出结论，C / N比的增加对基于生物活地的罗非鱼 - Redclaw小植物共同培养系统的饲料利用效率和水质产生了积极影响。

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