Management techniques of carp stocking: selection of local fish species

Carp

Cleaning and disinfection, fertilization and water cultivation should be carried out in the pond before stocking. The carp were disinfected 10-15 days before entering the pond. For dry disinfection, 60kg quicklime is used per mu; when wet disinfection, 1m water depth is 120kg-150kg quicklime per mu. For lean water ponds or newly-built ponds, apply organic fertilizer before injecting water into the ponds, applying hundreds of kilograms of fertilizer and sediment per mu. Fertile ponds and ponds that have been farmed with fish for many years have more silt at the bottom and no or less basal fertilizer. In the process of culture, with the growth of pond fish, the water color becomes lighter, generally topdressing with inorganic fertilizer.

The specification of fish species is more than 10 cm (preferably 140cm, 60g ~ 100g). The specifications of fish species are the same, no injury and no disease. Strictly disinfect before entering the pond, generally soak in 3-5% salt water for 10-15 minutes. The best source of fish species is locally produced fish species. Properly raise silver carp with large size flowers.

Stocking time and stocking density are generally better in March or April, when the water temperature of carp can be fed to ensure the physique and improve the survival rate. The water depth is 1.2 to 1.5 meters, about 50 to 60 grams per mu, 8000 to 9000 fish per mu and 80 to 100 grams to 5000 fish per mu. If the culture conditions such as water source and water depth are not very ideal, the culture density should be appropriately reduced.

Feeding artificial compound feed, the artificial compound feed formula is roughly 70% fish meal, 20% soybean meal, 5% yeast powder, and the rest are vitamins, mineral salts, growth promoters and antibiotics. However, domestication should be carried out at the beginning of feeding compound feed, and the process of domestication is to gradually increase the amount of compound feed. Feeding to achieve timing, positioning, quality, quantitative. During the peak eating season, the amount of bait is about 4% of the fish weight, and the high one can reach more than 6%. Pay attention to the adjustment of fish intake quantity and specifications in different stages according to fish size, season and water environment. The food intake of carp is very different because of the good weather, high air pressure and good water quality. In the actual breeding process, there is no feed surplus or little surplus shall prevail.