Abstract: Aiming to explore the practical application effect ofthe combined aeration mode of microporous aeration + impellerwheel aerators in high-density culture of adult Yellow Catfish (Pelteobagrus fulvidraco). A pond experiment was conducted in 2024 at an aquaculture base of Huanggang Institute of Fisheries Science, Hubei Province in 2025. Two groups were set up: the control group (waterwheel aerators+paddlewheel aerators) and the experimental group(microporous aeration + impellerwheel aerators). Water quality indicators, growth performance of yellow catfish, and economic benefits of the two groups were systematically determined and compared under high-temperature and rainy weather conditions. The results showed that the experimental group could significantly increase the dissolved oxygen (DO) level in the bottom water. Under high-temperature weather, the bottom DO in the experimental group was about 42.3% higher than that in the control group, and the concentrations of ammonia nitrogen and nitrite in the bottom water were significantly reduced (P<0.05). In terms of growth performance, the final average body weight and survival rate of yellow catfish in the experimentalwere significantly higher than those in the control group (P<0.05). Economic benefit analysis indicated that although the equipment purchase and operation costs of the experimental group were relatively high, its net profit was 85.3% higher than that of the control group, with an input-output ratio of 1.46, showing significant economic advantages. This study confirmed that the combined mode of microporous aeration + paddlewheel aerators could effectively solve the problem of bottom hypoxia in high-density yellow catfish culture, and provide a practical technical support for the green and efficient culture of yellow catfish.

Key words: yellow catfish (Pelteobagrus fulvidraco), microporous aeration, paddlewheel aerator, water quality, growth performance, economic benefits