Abstract
The present study investigated the effect on the growth performance derived from far eastern catfish Silurus asotus and vegetable Lactuca sativa L. cv. fidel and the change of water quality in biofloc technology (BFT) system, aquaponics system based on BFT (BFT-AP), and hydroponics system (HP) for 4 weeks. The weight gain rate (WGR), specific growth rate (SGR) and feed conversion ratio (FCR) of S. asotus was more effective in BFT-AP (136.5%, 2.72% and 1.14) than in BFT (115.6%, 2.45% and 1.34). The total weight, leaf weight, total leaf length and leaf width of L. sativa was higher (154.5±3.98 g, 118.7±2.31 g, 198.2±2.49 mm and 156.8±3.29 mm) in BFT-AP than in HP (120.8±3.94 g, 94.6±3.47 g, 148.7±4.62 mm and 117.8±1.87 mm). The context of inorganic ions in breeding water and fidel were lower in BFT-AP than in HP. We suggested that a large amount of nitrogen compounds and inorganic ions contained in BFT not only enhances the growth of cultivated fidel, but also improves the water quality, thereby creating an environment suitable for growth and feed effection of S. asotus.
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