In the autumn, the fry grows to "six off"

The autumn temperature and water temperature are more appropriate, and the following six levels should be taken when cultivating the autumn fish fry.

First, clear pond. Clear frogs, snakes, fish, shrimp, insects, bacteria and other predators in the pond. The pool water can be drained. After every 667 square meters, 60 to 80 kg of quick lime or 4 to 5 kg of bleaching powder are dissolved in the water and the whole pool is splashed.

Second, scientific fertilization. Moderate and appropriate fertilization can provide abundant palatability feeds for autumn fish fry. General fish fry 6 days before the next pond into the new 60 cm deep water, 2 days after the application of organic fertilizer per 667 square meters 300 to 400 kg, after moderate fertilizer, so that the transparency of the pool to maintain at 30 to 35 cm.

Third, reasonable and thin. Dilution can provide a good ecological environment for fry and accelerate its growth. Can generally be enough to put enough fry, put every 1.2 to 15,000 per 667 square meters, of which 0.7 to 0.8 million squid, carp 0.2 to 0.3 million, grass carp 0.3 to 0.4 million.

Fourth, scientific feeding. After the fish fry under the pond, while keeping the fertilizer, it spills 1.5 to 3 kilograms of yellow soybean milk per 667 square meters of water and splashes twice a day. After 5 days, it feeds the flour and other concentrated ingredients, 2 times a day, every 667 square meters of water. Feed 2 to 4 kg and start feeding green feed. Fishes over 3 cm in diameter can be fed with duckweed, which is fed with 10 to 20 kg of water per 667 square meters of water every day; and when the length of fry reaches 7 cm, 20 to 40 kg of water is applied per 667 square meters of water. When the length of fry reaches more than 8 cm, it can be fed with water grass or dry grass. In the case where no duckweed can be used, it can also be replaced by beech pulp.

Fifth, regular water injection. The fish fry pond began to change the water in about 4 days, changing the water every 4 to 5 days, changing the water depth by 10 to 20 centimeters each time; after 20 days, changing the water once every 7 days, changing the water depth by 10 centimeters each time. Change the water should pay attention to prevent enemy invasion.

Six, prevention and treatment of fish diseases. Weed and weeds are often removed from the poolside. The food table and foodstuffs are periodically disinfected with quicklime or bleaching powder dissolved in water every ten days.

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