First, the mixed feeding method is to apply 300 kilograms of manure to each mu of water three days before the natural feed such as rotifer is cultivated in the fry pond. A few days after the fry enter the pond, put in 2 kg of soybean milk or 3 kg of cake powder per mu of water surface every day to supplement the shortage of natural feed, and then apply 1 time every three days, and apply decomposed compost 150 kg per mu of water surface every time. After feeding 1 week, if the number of macroplankton in the pond water can't meet the needs, in addition to feeding concentrated feed, more duckweed or tender grass should be added and piled in the shallow water around the pond for some herbivorous fry to eat.

Second, the cake powder feeding method grinds bean cakes, cottonseed cakes, rapeseed cakes and peanut cakes into dry powder to feed the fish. Its usage is: the dry cake powder is evenly spread on the water surface, and the dry powder floats in the pool for a long time with high utilization rate. Use 2 kilograms of dry cake powder per mu of water every day and feed it 4 times a day.