Fish fry culture mainly includes the following technologies: pond selection, pond cleaning and disinfection, water release, feeding management, water quality management, etc.

1, pond selection

Splash fry culture pond requires solid bottom beam, no water leakage, sufficient water source and convenient water injection and drainage. The fish pond should not be too big, 1-3 mu, and the water body should not be too deep, 60-80 cm in the early stage. If it is too deep, it is difficult to raise the water temperature. The area is too small and too large, the water temperature changes rapidly, and the growth conditions of splash fry are difficult to control.

2, pool cleaning and disinfection

The pond must be cleaned before the fry are released. Before the fry are released 10 days, the pond should be drained, weeds removed and excess silt dug up. There should be no residual fish and shrimp in the pond. After the pond is cleaned, it is disinfected with quicklime. Generally, fry can be released after 7 days, which is the key to ensure the survival rate of fry.

3. Release water and seedlings

It is best to add fresh water, cultivate algae in advance, and apply fertilizer before releasing seedlings to ensure that there is enough palatable natural bait for fry after entering the pool. Old water and rotten water are not suitable, and the sprayed water body should not be too deep, and 60 ~ 80 cm in the early stage is suitable. After the toxicity of water disappears, put the splashed fry into the pond, and the quality of fry directly affects the survival rate of fry. Farmers should choose healthy fry for stocking.

4. Feeding management

After the sprayed fry enter the pond, the artificial bait must be fed with water feed, and the dry material is useless, so it can be sprayed manually or mechanically with a sprayer. Generally, within a week or ten days, water is transferred with boiled egg yolk water or raw soybean milk, and "water material" is sprinkled for feeding. After feeding for seven days, feed with fine powder (such as flour). Generally, per mu 1.5-2 kg of flour is enough.

5. Water quality management

In the early stage of water spraying, the water depth should be controlled at 60 cm ~ 80 cm. After 7 days, inject 1 time every 2 ~ 4 days, and inject 10 cm ~ 15 cm each time to expand the growth space of fry. When injecting water, it should be noted that the injection time should not be too long, so as to avoid the long-term top flow of fish, consume physical strength, affect growth or cause horse racing disease.