Flood avoidance fishery technology

After the disasters of inundation and flood in small lakes and ponds along the lake and river, two technical models of adult fish culture and fish species culture are usually carried out in fishery production. The main technical points are introduced as follows: a, the technical model of adult fish culture 1, the basic conditions. After the water level begins to fall in the main flood season, the water level begins to fall, and dams and pool ridges that have not been damaged or can be repaired in time should be repaired in time and keep the water depth above 1 meter. 2. Cleaning and disinfection. The lake sets up fish blocking facilities to strengthen the dyke; check the fish stock, put the adult fish up to the market specification on the market, stay and rearrange the last one, and disinfect the pond with lppm bleach. 3. Seedling release (1) stocking time: after the main flood season, the water level begins to fall and stabilizes, usually in mid-late July. (2) stocking specification: the body length of the main breeding variety is above 20Cm, and the breeding variety is above 10cm. Strive for the early sale of large-size commercial fish. (3) breed and quantity: in terms of species and quantity, make up 60% of the number of fish, promote the rapid growth of fish through appropriate sparse placement, increase the size of fish out of the pond, and raise 500 000 species of grass and late summer flowers per mu to prevent the shortage of large-sized fish species. 4. Applying bait and fertilizing. Adequate feeding and rational fertilization are the key technical measures for successful aquaculture. Breeders must increase the amount and frequency of compound feed if they want to catch 1 Murray adult fish twice on the market from September to early November. Generally, the daily feeding amount is 5% of the body weight of the fish stored in the pond, and the daily feeding times is 3 murals and 4 times. Feeding should be carried out in accordance with the principle of "four determinations", and the variety and amount of feed should be adjusted at any time according to water temperature, weather, water quality and growth stage. Pond fertilization is mainly inorganic fertilizer, supplemented by organic fertilizer, and keep the transparency within 40cm. 5. Disease control. Immediately after the flood, disinfection was carried out to kill foreign pathogens. Drug prophylaxis is carried out every 20 min 30 days, and trichlorfon, Erao hydantoin and other insecticidal and bactericidal drugs should be used alternately. Oral administration of drugs was given every 30 days. Timely diagnosis and treatment of diseased fish. 6. Daily management. Insist on patrolling the pond in the morning and evening, observe the eating and growth of fish, check the inlet and outlet facilities, salvage grass residue, and deal with problems in time. B, technical model of fish culture 1. Basic conditions. Fish culture can be carried out in the waters where a large number of fish escape from the water for a long time. Generally choose a lake or pond in which the ridge can be repaired in time and can dry the pond. 2. Clear the pond and disinfect. Put 150,000,000 kilograms of quicklime to disinfect the whole pond and kill the bacteria and wild fish in the pond. Close follow net cloth is set up at the inlet and outlet to prevent wild fish from entering. 3. Seedling stocking (1) stocking time: the seedlings can be released after 10-15 days of disinfection. (2) stocking specifications: large summer flower fry with specifications above 3cm. (3) Variety and quantity of stocking: the total amount of stocking per mu is 6000mu, with one variety as the main breed, the quantity of which is 70% of the total amount of stocking, and the quantity of mixed breed is 2% of the total quantity, and the quantity is 30% of the total amount. 4. Applying bait and fertilizing. The daily feed intake is 6% of the body weight of the fish stored in the pond, and the daily feeding times is 2 Mel 3 times. Pond fertilization is dominated by organic fertilizer, supplemented by inorganic fertilizer, and the transparency is kept within 30cm. 5. Disease control. Drug prophylaxis is carried out every 20 min for 30 days, and the insecticidal and bactericidal drugs such as copper sulfate, trichlorfon and Erao hydantoin can be used alternately. Timely diagnosis and treatment of diseased fish. 6. Daily management. Insist on patrolling the pond in the morning and evening, observe the eating and growth of fish, check the facilities of the inlet and outlet, adjust the water quality, salvage the sick and dead fish species in time, and deal with the problems in time.