The pond should have good lighting, good ventilation and convenient water intake and drainage. The pH value of the pond water should be neutral or weakly alkaline, the transparency is about 30cm, the water depth is1.5 ~ 2m, the entrance and exit are provided with escape nets, and the bottom of the pond is silt, covering an area of 2 ~ 4mu.
Second, fish species selection
In snakehead culture, large-scale and high-quality fish should be put in, the size is about 10- 15 cm, and 2,000-2,500 fish can be put in per mu, and 200-300 large-scale silver carp can be interplanted.
Third, feeding technology.
1, fresh bait: snakehead is a carnivorous fish, and it is still dominated by small miscellaneous fish, which can be used in fresh water and seawater. In the early stage of aquaculture, large wild miscellaneous fish are chopped and fed, and the daily feeding amount is generally about 5% of the total weight of fish.
2. Artificial compound feed: snakehead can also be fed with artificial compound bait, and its formula is: 70% of minced shrimp paste, 20% of bean powder, 5% of yeast powder, and the rest are multi-dimensional mineral salts, growth promoters and antibiotics. Feeding should be timed, located, qualitative and quantitative. Feed it twice a day, once in the morning and once in the afternoon. When the appetite is strong, feed it at night.
Fourth, daily management.
1, patrol the pond: patrol the pond every morning and evening, carefully observe the feeding and activities of snakehead, pay attention to the changes of water quality, and deal with problems in time when found.
2. Changing water: Once the bait is found to be excessive or the water quality is aging, new water can be injected and old water discharged to keep the pool water fresh and promote the normal growth of snakehead.
Verb (abbreviation for verb) disease control
1, fish species enter Tang Qian 10 ~ 15 days for pond cleaning and disinfection. When cleaning the disinfection pond by dry method, generally 60 ~ 75 kilograms of quicklime is used per mu; When cleaning the pond with water for disinfection, the general water depth is 1m, and the quicklime is 120- 150kg per mu.
2, disinfection of fish, such as fish bought in the market, must be disinfected before going to the pond, and the fish can be soaked in 2.5% ~ 3% salt solution 15 ~ 20 minutes.
3. Disinfect the dining table regularly and splash it with bleach solution.
4. Although snakehead has strong disease resistance, it is also prone to diseases after high-density culture, mainly hemorrhagic diseases, skin rot, scabies and so on. Treatment is carried out by combining oral administration and external use. Every half month, use100g chlorine dioxide to splash the whole pool per mu, and take enrofloxacin orally.