White-breeding adult rearing techniques include pre-reserve preparation, stocking, bait feeding, and day-to-day management.
1, clear pond disinfection
The ponds need to be cleared of sludge to protect the pond slopes. Ten to 15 days before stocking, 1 meter per acre of water uses quicklime 125-150 kg of water and is splashed by Quanchipu.
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, 1500-2000 tails of each year are placed in the weight of 10-15 grams per acre in the late winter and early spring, and 3000 fish fry in the year of the next year is added at the beginning of June, and 300 fishes per acre can be produced at the end of the year. Kilograms with more than 2,000 fish tails weighing 10-15 grams; 3000-4000 fish fry raised per acre for the current year can produce 250-300 kg of fish 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 production of these fishes should not exceed 15%-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€, keep the water clarity 25-30 cm, pH 7.5-8.3. As the season and water temperature are different, new water is added to adjust the water level, usually once every half month, once a week in the high temperature season, adding 15-30 centimeters of water each time, and if necessary, changing 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.
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