Fry cultivation
The nursery, cement pool, cages and ponds can be used for cultivation. The following mainly introduces the method of pond cultivation of fish fry.
The size of ponds used to cultivate splash ponds is generally 3/15 to 5/15 hectares, with a water depth of about 0.6 meters. 1 month before the fry stocking to clear the pond, disinfection, until the efficacy disappeared after the release of water about 30 centimeters, fertilizer and water, until the zooplankton feed enough fish rearing fry. After the fish fry under the pond, raise the water level every 5 to 10 centimeters until the water depth reaches 60 centimeters. After 20 to 30 days, the hatched fry can grow to 0.8 to 1 cm, after which it can be transferred to the summer flowering stage.
The size of the pond that cultivates summer flowers is not limited. Before the fry are stocked, the lime is used to clear the pond and fertilize the water. The stocking density is generally 900,000 to 1.2 million per hectare. In the initial stage of stocking, the water depth was 0.5 meters, and then gradually deepened with the growth of the fish until it reached 1.2 meters. From the second day of fry stocking, two artificial feeds were fed daily. Soymilk is available in the first week, and compounded feeds can be gradually used later. Usually about 40 days, fry can grow to 7 to 10 cm.
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