Site selection: build ponds in noisy places far away from residential areas, requiring convenient transportation around. Pond: The area should be 6-9 mu, the pond water should be deep, the water quality should be clean and pollution-free and have high dissolved oxygen (above 5mg/L). Equipment: prepare oxygen supply equipment, water inlet and outlet and other equipment. Disinfection and cleaning: clean the pond with quicklime before releasing the fry, and then cultivate plankton after cleaning the pond to ensure the normal growth of sturgeon.

First, how to breed sturgeon

1, preparation before breeding

(1) site selection

Ponds should be as far away from noisy places such as residential areas, factories and major roads as possible, but it is also necessary to ensure convenient transportation and communication.

(2) Pond

The area should not be less than 5 mu, preferably 6-9 mu. The water is deep, clean and pollution-free. The water level is generally about 3m, and there is a high value of dissolved oxygen in the water. It is recommended to be above 5 mg/L.

(3) Equipment

Special feed table, oxygenator or oxygen supply equipment, water inlet and outlet, etc.

(4) disinfection and cleaning

(1) half a month before the fry are released, water 15-20cm is poured into the pond, and 100- 150kg of quicklime is poured into the pond, so as to eliminate harmful organisms in the water.

(2) Soak the pond for 3-4 days, then drain the water out of the pond, and then soak the bottom of the pond with water again. The water inlet needs to be filtered with a 60-mesh sieve.

(3) Then use 15-20kg tea seed cake to clean the pond for disinfection. Before disinfection, it is necessary to break the tea seed cake and soak it in water. 1 day later, it will be spilled all over the pond, which can eliminate fish, shrimp and fish and shrimp eggs in the pond.

(4) After the pond is cleaned, the tea bran can be left in the pond as fertilizer. Before the seedlings are released 10 day, the pond is added with water to a depth of 70-80cm, and then disinfected with chlorine-containing disinfectant.

(5) culture plankton

7-8 days before seeding, 50kg dry chicken manure was used to cultivate plankton. The method was to soak the chicken manure for 2 days, disinfect it with chlorine-containing disinfectant, filter to remove impurities and sprinkle it all over the pond. After the filter is wrapped with fiber bags, it is put into the downdraft of the pond and continues to be used as fertilizer for cultivating plankton.

2. Select fry

(1) Choose healthy sturgeon fry without disease, the recommended body length is more than 20cm, and the stocking density of large-sized fry is generally 400-600 fish/mu.

(2) If the fry need to be transported, the feeding should be stopped at 1-2 days before the transportation, and 38? 82 polyethylene packaging bag, add 3/5 of water into the bag, and adjust the water temperature to 12- 15℃. Generally, each bag contains 20 fry with a body length of 20-30cm, which can be transported after packaging. If the transportation time is less than 8 hours, it can be transported by water truck, but it is necessary to pay attention to the change of water temperature and adjust it in time.

3. Stocking fry

(1) Test the water two days before releasing the fry, put 10 fry of the same specification in the cage, observe the activity of sturgeon, and release the fry if there is no abnormality.

(2) When releasing seedlings, do not open the transported seedling bag first, but put the whole bag into the pond first, so that the water temperature in the bag is close to that in the pond, and then open the bag mouth to put the seedlings into the pond.

(3) For farms with good conditions, fish can be poured into a big barrel with water to keep continuous aeration, and salt is put into the barrel, with the salinity of 2% in general. After soaking the fish body 10 minute, the seedlings can be put into the pool.

4. Feeding management

(1) In the artificial feeding environment, both the domesticated sturgeon fry and adult fish can eat artificial compound feed, with crude protein content of 40-45%, particle size of 0.6- 1mm and daily feeding rate of 6-8%.

(2) Fish meal, meat and bone meal, blood meal, feather meal, silkworm chrysalis, all kinds of oil cakes, rice bran, bran, etc. are the main feeds, and earthworms, maggots, small insects, animal viscera, etc. can also be fed.

(3) For seedlings weighing about 5g, the feed particle size is 1- 1.5mm, the weight is 10-30g, and the feed particle size is 3-3.5mm, while for large seedlings weighing 50- 100g, the feed particle size is 5-/kloc-.

(4) If the earthworm is fed, it needs to be disinfected with 2-4% salt water, and the dead fish, feces and residual bait in the pond should be removed in time to maintain the stability of the pond water environment.

5. Daily management

(1) patrol the sturgeon pond at least three times a day in the morning, noon and evening to observe the growth of sturgeon, especially at night and early morning, and observe the activities of each fish to prevent hypoxia. If there is hypoxia, it is necessary to use an aerator to increase oxygen or add new water to prevent flooding of the pond.

(2) In summer, because there are many fish and the air pressure is low, it is necessary to strengthen the patrol of the pond, and if there are any problems, they should be solved in time.

(3) According to the growth and health of sturgeon, the feeding amount and density should be adjusted appropriately.

Second, sturgeon culture conditions

1, water temperature

Sturgeon doesn't have high requirements on water temperature, and can adapt to various water temperatures quickly, and can withstand the low temperature of 0℃, with the high temperature not exceeding 35℃. The water temperature for breeding is generally 20℃, and it should be controlled at around 19℃ during production and incubation, and at around 15℃ in winter to ensure the normal appetite of sturgeon.

2. Dissolved oxygen

Sturgeon has a high demand for dissolved oxygen. Generally, it is necessary to control the dissolved oxygen in the water above 5mg and below 5mg, so that the sturgeon's appetite decreases, and when it is below 3mg, the sturgeon stops eating, appears anoxic symptoms, moves slowly, appears coma, and will die in severe cases.

3. pH value

Acipenser sturgeon is suitable for alkaline water, and the PH value of the water can generally be controlled at around 7.5. If the water is acidic, the content of carbon dioxide in the water will increase, resulting in a sharp decline in dissolved oxygen, which will affect the growth of sturgeon.

4. Lighting

The light demand of sturgeon will generally change with the change of lifestyle. When swimming vertically, sturgeon has a certain fear of light, and it will gradually disappear when it slowly enters the benthic stage. Generally, light will not affect the growth and development of sturgeon, but in high temperature environment, the water temperature will increase, which will affect the growth of sturgeon. Therefore, it is necessary to build a sunshade in high temperature season.

5. Transparency of water quality

In order to ensure the healthy growth of sturgeon, the transparency of water quality should be maintained at about 50cm. When sturgeon gradually becomes an adult, the transparency can be reduced to about 30cm, which is convenient for observing the growth of sturgeon. At ordinary times, it is necessary to clean up feces and residual bait in time to avoid reducing the transparency of water body.