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首页> 美国卫生研究院文献>SpringerPlus >Supplemental effects of mixed ingredients and rice bran on the growth performance survival and yield of Nile tilapia Oreochromis niloticus reared in fertilized earthen ponds
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Supplemental effects of mixed ingredients and rice bran on the growth performance survival and yield of Nile tilapia Oreochromis niloticus reared in fertilized earthen ponds

机译：混合成分和米糠对土壤肥料中尼罗罗非鱼尼罗罗非鱼的生长性能存活率和产量的补充作用

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Unaffordability of commercial feeds to semi-intensive Nile tilapia, Oreochromis niloticus farmers has led to reliance on supplemental feeding and fertilization for nutrition of their fish without a scientific basis. This study compared the growth, survival, condition factor and yield performance of O.niloticus fed on mixed ingredients (MI) and rice bran alone (RB) diets reared in fertilized earthen ponds in small scale farmers’ ponds. The study also determined phytoplankton composition, biomass and abundance in the experimental ponds. Quadruplicate ponds were stocked with O. niloticus and African sharptooth catfish, Clarias gariepinus at a stocking ratio of 1:3. The initial mean weights of O. niloticus and C. gariepinus were 14.62 ± 0.61 and 20.34 ± 1.44 g respectively. The fish were fed on MI and RB diets with protein content of 184.74 and 126.06 g kg−1 respectively for 270 days. The results showed that growth performance, survival rate and condition factor of O.niloticus were not affected by either feeding with MI or RB diet (p > 0.05). Moreover, there were no significant differences obtained in phytoplankton biomass and abundance in O.niloticus ponds fed on the two diets (p > 0.05). Furthermore, feeding O.niloticus either on MI or RB diet did not affect the net and gross fish yields (p > 0.05). The study revealed that the use of either MI or RB diet does not significantly affect the performance of O.niloticus cultured in semi-intensive earthen ponds where natural food organisms are an integral part of the culture system. Rice bran could be used for semi-intensive culture of O.niloticus in fertilized ponds to boost the production based on its availability and low cost.
机译：商业饲料对半精制尼罗罗非鱼的买不起，导致尼罗罗非鱼养殖者在没有科学依据的情况下依靠补充饲料和施肥来养鱼。这项研究比较了在小规模农民池塘中以混合成分（MI）和仅米糠（RB）饮食喂养的罗非鱼的生长，存活，条件因子和产量表现。该研究还确定了实验池塘中的浮游植物组成，生物量和丰度。一式四份的池塘中放养了尼罗罗非鱼和非洲锐齿cat鱼（Clarias gariepinus），放养比例为1：3。尼罗罗非鱼（O. niloticus）和加里木梭菌（C. gariepinus）的初始平均重量分别为14.62±0.61和20.34±1.44 g。用MI和RB日粮喂养这些鱼，蛋白质含量分别为184.74和126.06 g kg -1 持续270天。结果表明，MI或RB饲喂均不影响尼罗罗非鱼的生长性能，存活率和条件因子（p> 0.05）。此外，两种饮食喂养的尼罗罗非鱼池塘的浮游植物生物量和丰度没有显着差异（p> 0.05）。此外，以MI或RB饲喂罗非鱼不能影响鱼的净产量和总产量（p> 0.05）。该研究表明，使用MI或RB饮食不会显着影响在自然食物有机体是养殖系统不可分割的一部分的半密集土池中养殖的尼罗罗非鱼的性能。米糠可用于受精池塘中的尼罗罗非鱼的半精养，以其可获得性和低成本为基础来提高产量。

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