1. Seedling raising: the stocking density is 5/m2. Before stocking, use quicklime or bleaching powder for disinfection, then apply decomposed organic fertilizer to provide food for pond bream, and then feed it to prepare feed later, and cultivate it for about 15-2 days. 2. Pond culture: 1,-15, fry are stocked in each acre of pond, and the daily feeding amount is about 8-1% of the weight of pond fish, and it is fed 2-3 times a day.

1. Culturing techniques of pond fish fry

1. Culturing fish fry

(1) Generally, cement ponds are used to cultivate fish fry, and the stocking density is 5 fish per square meter.

(2) Before going into the pond, use quicklime or bleaching powder for disinfection, then apply decomposed organic fertilizer to cultivate water quality, and provide food for the pond fish. At the later stage, feed the pond fish with fish meal and flour.

(3) culture for about 15-2 days, and when the fry grow to about 3-5cm, they are ready to be raised in the pond.

2. Pond culture

(1) Pond treatment

(1) Use 25kg of quicklime or 5kg of bleached water for disinfection in each acre of pond.

② about 7 days after disinfection, test the water, and if there is no problem, you can start planting seedlings.

(2) Stocking

① Stocking 1,-15, catfish fry per mu of pond (about 1.5m deep).

② At the initial stage of stocking, a water area (with an area of about 5-8 square meters) is enclosed by a dense net, and the fry are kept in it for about 1-15 days.

③ With the growth of seedlings, gradually deepen the water level, and then remove the dense net.

(3) Feeding

① In the early days, Daphnia, Eisenia, or compound feed made of fish meal and silkworm chrysalis were mainly fed. When the pond fish grow up, feed cooked and chopped animal viscera, miscellaneous fish, shrimp, etc.

② The daily feeding amount is about 8-1% of the weight of the pond fish, and it is fed 2-3 times a day.

2. Is the requirement for water quality high for pond fish

1. The adaptability of pond fish seedlings is worse than that of adult fish, and the requirement for water quality is higher. Generally speaking, it is required that the dissolved oxygen in water should be above 3mg/L, preferably 5-8mg/L, and the ph should be kept at about 7-8.5.

2. When they grow up, the requirements for water quality of pond fish are lower, because pond fish itself belongs to a kind of scavenged fish, which has a certain ability to resist dirty water. Just pay attention to ph and the contents of ammonia salt and sub-salt.

3. The pond fish has dendritic respiratory auxiliary organs on gills and skin respiratory function, which can directly utilize oxygen in the air, so it has strong hypoxia tolerance and can survive in sewage for a long time, which ordinary fish can't survive.