Fingerling cultivation of cultured carp

Summer flower fish species must be selected without disease or injury, strong physique, lively action and neat specifications. Fish breeding generally adopts the mixed culture of 2 or 3 species of fish, but mainly one species. In ponds with carp as the main fish culture, 6000 million summer flowers are released every 667m2, with 20% silver carp and grass carp or 20% bighead carp and grass carp, and the size of the pond can reach 15cm. If 8000 ~ 10,000 summer flowers are released every 667m2, the size of the pond can reach 13,16cm.

In the process of fish breeding, only relying on the natural bait in the water can not meet the growth needs of fish species, so artificial feeding and fertilization are necessary. When the fish species first went into the pond, the daily feeding amount was 1: 1.5 dry grams per 667 square meters, and then gradually increased to 2.5 kilograms. We should follow the principle of "four decisions" and vote twice a day. Feed from 9 am to 10:00 and from 4 pm to 5 pm. The quality of the bait must be guaranteed to prevent mildew and deterioration. Cast on a 1 square meter round or square bait table made of bamboo strips. The bait table is fixed in the shallow water area at the depth of 30cm and 40cm with piles, and there are two bait tables for every 667 square meters. The amount of fertilizer should be moderate to maintain the good water quality of fat and cool. 150 kilograms of manure can be applied every 667 square meters every 10 days. If organic fertilizer is too little, chemical fertilizer can be applied every 667 square meters, 1.5-2.5 kg of urea and 3-5 kg of superphosphate every 10 days. The daily management is to patrol the pond once a day to observe the water color and the activity of fish species. The bait table should be cleaned frequently to remove weeds by the pool. Disinfect the food farm with bleach every 10 to 15 days. When fish species are cultivated to August and September, different sizes of fish species should be reared in separate ponds. In order to improve the water quality of fish ponds, water is added twice a month where there is plenty of water. When the water temperature drops to about 10 ℃ in early winter, choose sunny weather and concentrate the fish species according to species and specifications in deeper ponds to survive the winter. The overwintering pool should be leeward and sunny, with a water depth of 1.5 to 2 meters. Every 667 square meters of water can put 750 thousand kilograms of fish fry. When drawing nets, screening fish, counting, crossing ponds and other operations should be careful and meticulous. Management should prevent freezing and lack of oxygen.