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River? Mixed Chinese shrimp technology
River? Mixed Chinese shrimp technology is a precious fish, the foreign market prices are high, sales in short supply. It is the ideal new breeding breed. The river is a carnivorous fish that inhabits the sandy bottom and mainly ingests shellfish, crustaceans, small fish, shrimp, and cephalopods. The suitable water temperature is 15°C to 20°C, and the water temperature at 6°C can be overwintering for salinity. 25 to 32, the dissolved oxygen requirement is more than 4 mg/l. First, the choice of pond selection Pond culture must be based on the river and the Chinese shrimp habits of their choice of good ponds, should choose the bottom quality, good quality and pollution-free small pool, pond area of ​​10 acres to 20 acres, the average pool level 2 meters or more. Second, clearing pool disinfection First, the bottom of the sludge is completely removed, and bleaching powder, bleaching fines, quicklime, etc. are used to disinfect and sterilize according to the requirements of the breeding techniques. Third, strictly control the density of seedlings, fish and shrimp polyculture to strictly put a good seedling clearance, strict control of seedling density, enlarge seedlings, put strong seedlings, put high-quality sterile seedlings. In the river, each year, in May, 3 cm to 4 cm of aquarium will be planted with 100 to 120 fish fry. At the end of April each year, Chinese shrimp will put 3 centimeters or more of 7000 reared shrimps. Fourth, strictly control the quality of feed The main purpose of fish and shrimp polyculture is to suppress the spread of viral diseases, and the quality of good feed is an important guarantee for improving the disease resistance of shrimp itself, and it is also an important guarantee for increasing the output of fish and shrimp and increasing economic efficiency. . Heyutun mainly ingests high-quality shellfish, crustaceans, and small fish and shrimps. It should adhere to live and small fish, shrimp, and high-quality artificial synthetic feeds, and should be fed at regular time. 5. Everyday management insists on a patrol once a day. Check the quality of water, dissolved oxygen, food, fish and shrimps, and inject water every 7 days to 10 days. During the hot season, increase the amount of water injection, keep the pool water fresh and the pool water level, so that fish and shrimp have a good environment. The use of rivers and Chinese shrimps for polyculture mainly makes full use of rivers to suppress the occurrence of shrimp disease. Because the body fluid secreted by Heyutun has a certain inhibitory effect on the shrimp virus, the river can also catch diseased shrimp with weaker active capacity, cut off the source of disease, purify the water quality in the pool, and create a good water environment for the rapid growth of shrimp to achieve high yield and high efficiency. , fish and shrimp harvested. In the first year of the river, the individual body weight can reach more than half a catty. The temperature of the water drops below 8°C and it is transferred to the sea fish factory breeding center for winter. Every two springs, when the water temperature is appropriate, it will be transferred into the shrimp ponds to cultivate. At the time of harvest, the body weight was 0.6 kg to 0.75 kg, and the survival rate was 80%. The average length of Chinese prawns when they were harvested reached 11.5 cm and the survival rate reached 75%. The benefits of fish and shrimp are considerable.