First, early stocking. The fish ponds excavated in the spring and the water surface that has not been released in the winter can be input into excellent fish species when the water temperature reaches 8 degrees Celsius. Fish seedlings are soaked with 3%~5% saline or 8ppm~10ppm bleach for 20~30 minutes.
Second, eat as early as possible. Grass, cockroach, cockroach, cockroach and eel began feeding at a water temperature of 10°C and gradually increased feed intake as the water temperature increased. Feeding the bait begins once a day, then later in the afternoon and once in the afternoon. The amount of feeding material: the concentrate is 1.2% to 2.5% of the body weight of the fish. It is advisable to eat the green material 4 to 5 hours after feeding.
Third, early water injection. In early spring, the water temperature is low, and the fish species are small. The water should be shallow when stocking begins. As the temperature rises, the fish grows and the water level deepens. The water injection is usually done once a month. It is advisable to inject 10~15 cm deep each time.
Fourth, early fertilization. In addition to applying base fertilizer before irrigation, ponds need to be topdressed when the temperature rises to cultivate more natural food. Fertilizer application amount is 50 to 100 kilograms of human fecal urine or 100 to 150 kilograms of livestock manure per hectare pond surface; if chemical fertilizer is applied, the ratio of nitrogen, phosphorus and potassium should be 2:2:1, and the total amount is 1.5 to 2.5 kilograms; Fertilization cycle 10 to 15 days.
Fifth, early prevention of disease. Adhere to "early disease-free prevention" and not feed deteriorating feed. Drug prevention: Sprinkle with 2ppm bleach or 0.7ppm copper sulfate every 15 to 20 days.
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