Early release of fry in spring solar terms

Fish fry are released in beginning of spring solar terms, and beginning of spring is the best season for stocking fish. Fish farming should be carried out in sunny days with high temperature, and it is forbidden to raise fish in rainy days, snowy days and windy days. The storage place should be protected from wind and sun. A container (pot, bucket, etc.) for fish. ) Get into the water, let them tilt slowly, and let the fry swim to the pond by themselves.

The first is the transformation of fish ponds. In winter leisure season, small ponds, shallow ponds, dead ponds and leaky ponds should be adapted, and fish ponds with better conditions should also be trimmed, drained, exposed to the sun or frozen, and excessive silt should be dug in to eradicate weeds and raise and strengthen the pond ridges.

The second is disinfection of fish ponds. Quicklime in fish ponds has good disinfection benefit and can also directly play the role of fertilization. Disinfection should be carried out in sunny days, and there are two methods: dry pond method and water fetching method.

Dry excavation method: 60-75 kg of quicklime is used per mu, and 6- 10 cm of accumulated water must be left in the pool to make the poured lime slurry evenly distributed;

Water extraction method; The water depth per mu is 1m, and lime slurry is evenly spread all over the pond with quicklime 120- 150kg. Fish can be released in 7 ~ 10 days after disinfection.

The third is fair stocking. According to the conditions of fish ponds, planned output, water treatment, etc., the stocking ratio and density shall be determined, and various kinds of polyculture shall be fair and dense. The stocking quantity of high-quality fish such as allogynogenetic crucian carp and bream shall be increased, and freshwater pomfret, California perch and other varieties shall be appropriately raised to meet the demand of money market and improve economic benefits.

Fourth, the fish species are released in advance. From winter to Sunday to early spring is the best season for stocking fish. Because of the low water temperature and tight scales during this period, it is convenient for fishing operation and transportation, which can improve the survival rate of fish. Stocked fish should be disinfected in sunny days. The stocked fish should be soaked in 1-2% salt water with the water temperature of I0- 15℃ for1-0/5 minutes to kill the bacteria on the fish.

The fifth is the quality of fish farming. Generally speaking, the size of the stocked fish is above 13cm, with strong body, complete scales and fins, lively swimming and no disease or injury. This kind of fish has strong adaptability and high survival rate.

The sixth is feeding management. Fish should be treated in time after stocking. As the weather turns hot, feeding can be started when the water temperature reaches 10℃ in March.