Spring fish pond "precision" technology

In the spring, with the gradual recovery of water temperature, fish activity has gradually increased. Doing a good job in the spring management of fish ponds is an important guarantee for winning the harvest of fish farming throughout the year.

Clearance of the pond must be preceded by the removal of excess silt from the pond and timely renovation of the pond. The fish should be drained 15-20 days before stocking, let the sun exposure the bottom of the pool 3-5 days, 667 square meters lime lime 150 kg, and then put the water into the pond, so that the water depth of 50-60 cm. For ponds lacking water and inconvenient drainage, you can disinfect the ponds with quicklime, rattan or special clear ponds. Under normal circumstances, the depth of water is 10-20 cm, 667 square meters is made of quick lime 70-90 kg, the fish pond is about 1 meter water depth, and 667 square meters is thoroughly sterilized with quicklime 130-150 kg.

Early stocking of fingerlings in intensive culture ponds should be based mainly on winter rations and supplemented by spring rations. Early release of fish species can make them adapt to the environment, early growth and prolong growth period. At the same time, the water temperature in the early spring is low, the fish body is strong, the scales are closely attached, the fish activity is small, the early-release fish species are not easy to be injured, and they are easy to transport and have a high survival rate. The general water temperature 8 °C -10 °C can be placed on fingerlings. When the fry was shipped back, it was mixed with 1 kg of baking soda, 1 kg of salt, and 50 kg of water. After disinfection, the pathogens on the body surface and gills were killed, and then the water in the fish ponds was put into the fry container. Allow the fry to adapt to the water in the fishpond and put it in a 50-60 cm fishpond after 1 day.

Due to the severe winters, the energy consumption of the fish will be extremely high. When the water temperature rises to 10°C, ponds that mainly feed on omnivorous or edible fish should be fed early to feed and be fed regularly at regular intervals. feed. Generally, the main ingredients are cake flour, corn flour and wheat flour. The feed should be clean, fresh and tasty. We started feeding once a day and changed to feeding once a day in the afternoon and in the afternoon. When the cold wave arrives, the temperature of the water is low, and you should stop feeding for the time being until the temperature rises and then resume feeding.

Grass ash and grass ash are alkaline fertilizers and contain many trace elements. It is a kind of high quality and quick-acting potash fertilizer, and its application effect in fish ponds is better than chemical potash fertilizer. Frequently applying grass ash to fish ponds can increase the contents of potassium, phosphorus, calcium, magnesium and other elements in the water, promote the reproduction of plankton, and provide sufficient Natural food for the growth of fish. In addition, the ash has a bactericidal effect, which can effectively kill various pathogens on the fish body. It can not only disinfect fish ponds, but also purify water quality and promote fish growth. The specific use method is: Take the hay ash from the pot, immerse in the barrel or cylinder for 4-6 hours, splash with the leachate Quanchipue, do not use dry ash directly to spread. In the application of plant ash, human and animal manure cannot be applied at the same time.

Beware of fish disease, "a disease-free prevention, early disease prevention, and prevention-based treatment." In spring, as the water temperature rises, the germ propagation speeds up, and in addition to the disinfection and prevention of disease before the ponds are stocked, it is also necessary to do well: (1) All fish species should be soaked in 4% saline for 10-15 minutes in advance of the pond. Table disinfection, this is conducive to the survival rate of high fish species pond. 2 Sprinkle once every 15-20 days with chlorine dioxide, dibromohydantoin and other drugs. 3 Regularly remove the food bait and add new water regularly to deteriorate the waterproof quality. 4 prone to hydromycosis and parasitic diseases in the early spring, after the onset of symptomatic treatment should be promptly treated. 5 For ponds where there are more pests, the insecticides can be sprayed once or twice a week in the whole pond, which can effectively kill the overwintering eggs and larvae and reduce the occurrence of parasitic diseases.

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