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Application of fertilizers for fish farming is a new topic for application and promotion in the fish industry. Practice has shown that the appropriate amount of chemical fertilizers, such as ammonium bicarbonate, urea, and superphosphate, can be used to raise fish production in fish farming waters (ponds and reservoirs). Fertilizer fish farming technology is simple and easy to operate. The specific method is: From April to October every year, when the water temperature rises above 20°C, select super-prepared calcium superphosphate and ammonium bicarbonate at noon of the eye-catching day, according to the ratio of 1:1, the two fertilizers According to the first dissolved phosphate fertilizer, after the order of dissolved nitrogen fertilizer dissolved in about 30 times the water, and then evenly spilled in the whole pool, generally per acre of fish water surface with superphosphate 7 kg plus ammonium bicarbonate 7 kg, or 2.5 kg urea plus 5 - 7.5 kg of superphosphate, applied every 7-10 days.