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1, clear pond disinfection
The ponds need to be cleared of sludge to protect the pond slopes. In the 10 to 15 days before the fish species are stocked, 1 meter of water per acre is splashed with quicklime of 125 to 150 kg of water.
2, seed stocking
The stocking density should be moderate, white adult fish can be reared every year, and fry can also be used. However, the stocking density must be appropriate. If the stocking density is too high, the weight of the flesh will not reach 150 grams or more. specification. Under general breeding conditions, 1,500 to 2,000 fish species are bred every 10 to 15 grams per acre for the end of winter and early spring, and 3000 fish fry for the year of 3 cm at the beginning of June, and 300 fish per acre at the end of the year. Kilograms with more than 2,000 fish tail weights of 10-15 grams; if 3000-4000 fish fry are cultivated per acre, 250-300 kg fish can be produced per acre. If the protein content of the feed is more than 20%, not only the tail weight can grow to more than 200 grams, but also the yield per mu can reach about 400 kg.
3, breeding methods
White plover and herbivorous fish (such as grass carp, head lice) have the best mixed culture effect. In order to give full play to the productive potential of the waters, a small amount of cockroaches, cockroaches, and codfish may also be mixed, but the total output of these fishes should not exceed 15% to 20% of the total production of fish ponds.
4, feeding
Feed and fertilizer should be sufficient. Apply base fertilizer, apply fertilizer in time, and cultivate enough natural feed for fish to feed. At the same time to feed rice bran, bran and other concentrates to meet the needs of the growth of white peony. During feeding, care should be taken to feed the fodder first and then pellet feed or powdered feed to prevent herbivorous fish from catching the concentrate.
5, daily management
(1) Patrol pool and aerator management
After the fish species are released, they will be patrolled once a day in the morning and evening to observe the changes in water quality, fish activities and feeding conditions, adjust the amount of feed to be fed in a timely manner, remove impurities in the pool, and keep the pool clean and sanitary; find dead fish and diseased fish and pick them up promptly. Buried, and fill in the records truthfully. According to the weather and the fish's activity, the aerators should be turned on at a proper time. For example, normally, the machine should be turned on for 2 hours at noon every day to keep the dissolved oxygen in the pool water above 3 mg/L.
(2) Control water quality
Maintain the water quality to meet the requirements of “fat, live, tender, and coolâ€, maintain the transparency of the pool water 25 to 30 cm, and the pH value of 7.5 to 8.3. As the season and water temperature are different, new water is added to regulate the water level. Normally, once every half month, once in high temperature season, each time you add 15-30 cm of water. If necessary, you can also change the water in the whole pool. In areas where water is scarce, it is possible to achieve a high level of water for a pool of fish by splashing micro-ecological preparations and controlling algae on the water at the right time.
(3) Disease Prevention
Adhere to the principle of “giving priority to prevention, focusing on prevention and prevention,†and “disease-free early prevention, early disease prevention and managementâ€, and do a good job in cleaning and sanitation, tool disinfection, food field disinfection, Quanchiposa drugs and baits, etc. Measures to prevent the outbreak of fish disease. About half a month during the growth period, 1 quicklime (about 15 kg per mu), 1 mg/L bleaching powder, or 0.1 mg/L of strong chlorine fines are used to rotate the whole pool to prevent hemorrhagic and sepsis viruses and bacterial fish. Disease; Parasitic fish diseases such as trichomonads, small melon worms, and myxosporidiosis are treated with insecticides.
In summer and autumn, some individuals with a tail weight of more than 100 grams should be arrested for sale (at a time when fish supplies are in off-season) to reduce the load on the pond and promote the growth and development of small-sized fish species.
White-breeding adult rearing techniques include pre-reserve preparation, stocking, bait feeding, and day-to-day management.