Optimization of Phosphorus Fertilizer in Supplemental Feed-Fed Based Nile Tilapia (Oreochromis niloticus) Ponds

Abstract

An experiment was conducted in earthen ponds at the Asian Institute of Technology, Thailand to determine different phosphorus fertilizer dose effects on Nile tilapia production, water quality variables, nutrient utilization and cost-benefit under supplemental feeding. Five phosphorus fertilization rates were used as treatments e.g. 100%, 75%, 50%, 25% and 0% of 7 kg P ha week À1 . Nitrogen fertilization rate was fixed at 28 kg N ha week À1 for all the treatments. Sex-reversed Nile tilapia were stocked at 3 fish m À2 , and 30% CP floating feed fed at 50% satiation feeding rate. Nutrient budget showed higher phosphorus fertilizer input resulted in higher phosphorus sink in the sediment. Mean weight, mean weight gain, daily weight gain and net yield were not significantly different among treatments (P > 0.05). Total Kjeldahl nitrogen, total phosphorus and soluble reactive phosphorus were significantly different among treatments. Economic analysis showed phosphorus fertilization resulted in positive net returns. Though the gross income was not affected by different fertilization rates, significantly lowest cost was found in the treatment using 25% phosphorus fertilizer. It can be concluded from the research that 25% phosphorus fertilization might be used as an alternative strategy of Nile tilapia pond culture in terms of economic return and nutrient loss in sediment.

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

“…None of the parameters measured differed significantly between the ponds in which O. niloticus were fed on MI and RB diets. The water quality parameters obtained are comparable with those reported by Abdel-Tawwab et al (2007), Rukera et al (2012) and Oo et al (2014) for O. niloticus reared in earthen ponds. The water quality parameters measured in the present study were within the optimum ranges required for survival and growth of O. niloticus .…”

Effect of Different Supplementary Feeds on the Growth of Common Carp (Cyprinus Carpio)

“…The water quality parameters obtained in the current study were not affected by the types of diets used. The water quality parameters obtained are comparable with those reported by Abdel-Tawwab et al (2007), Rukera et al (2012 and Oo et al (2015) for O. niloticus reared in earthen ponds. The water quality parameters measured in the present study were within the optimum ranges required for survival and growth of C. carpio.…”

Dietary Protein Level Affects the Growth Performance of Large Male Genetically Improved Farmed Tilapia, Oreochromis niloticus, Reared in Fertilized Freshwater Cages

“…Tilapias consume plankton (Spataru ; Spataru and Zorn ) and detrital aggregate (Chapman and Fernando ), therefore raising them in fertilized ponds is a cost‐efficient culture method (Diana et al ; Turker et al ). In many Asian countries, to accelerate fish growth and increase pond yield at higher stocking densities than those receiving only fertilization, adding supplemental feed to fertilized ponds is growing in popularity, especially for semi‐intensive tilapia production (Oo et al ). It is assumed that tilapia require fewer nutrients in feed because they can obtain a substantial amount of nutrients from natural resources present in the environment.…”