How does tilapia grow fastest and how long is the breeding cycle?

1. Pond selection: Build a breeding pond where the water quality is fresh and there is no industrial pollution. The sugar area i

How does tilapia grow fastest and how long is the breeding cycle?

1. Pond selection: Build a breeding pond where the water quality is fresh and there is no industrial pollution. The sugar area in the pond is generally 5-20 mu, and the water depth is 2.5-4m. The bottom of the pond should be flat, the foundation of the pond should be firm, and there should be no tall awning around it. 2. Cleaning the whole pond: drain the water in the pond and expose it for more than 1 week, and then spray 225mg/L quicklime for disinfection. 3. Cultivation of water quality: After the drug toxicity disappears, water can be filtered with a 60-mesh screen.

1. How does tilapia grow fastest?

1. Select a pond.

(1) land selection

Generally, aquaculture ponds should be built in places with sufficient water resources, fresh water quality, no industrial pollution and convenient transportation.

(2) Pond

The area of sugar pond is generally 5-20 mu, the water depth is 2.5-4m, the bottom of the pond is flat and firm, and the water retention performance is good. It is required that the surrounding ventilation performance is good and there is no tall shade.

2, the whole pond clean pond

(1) Before stocking, the water in the pond should be drained and exposed for more than 1 week. During the exposure, the pond foundation needs to be repaired and strengthened.

(2) Generally, the dry pond can be disinfected by spraying 225mg/L quicklime on the whole pond. Note: Fresh water cannot be introduced within three days after pool cleaning, so as not to affect the pool cleaning effect.

3. Cultivate water quality

(1) Generally, the pond is cleaned for about 7 days, and after the toxicity of the drug disappears, 70-80cm of water is filtered with a 60-mesh screen, and 300-400 kg of organic fertilizer is applied per mu to cultivate plankton and provide bait for tilapia.

(2) When the water quality becomes fat, water can be gradually injected to1m.. When the seedlings enter the pond, with the increase of water temperature and the growth of fish, water can gradually fill to the maximum storage depth of the pond.

Step 4 stock fry

(1) selective seedling raising

① tilapia fry with smooth and harmless body surface, strong physique, plump fish body, neat specifications, high male fish rate and specifications of about 5cm should be selected for stocking.

② Before stocking, fish should be soaked in 5% salt solution, and then put into the fish pond.

(2) stocking fry

① After determining that the water in the pond is non-toxic, the tilapia fry can be released according to 1 tail /m3. Generally, 40-50 bighead carp (50g/ fish) and 30-40 silver carp (30g/fish) can be properly matched.

② When the specification of tilapia reaches100g/fish, 30-50 southern catfish can be properly put into each mu.

5. Feeding management

(1) Before the specification of tilapia reaches 150g, it can be cultured in rich water, that is, animal manure is poured into the pond to cultivate biological feed. Usually, apply fertilizer 1 time per week and 100- 150kg per mu each time.

(2) When the size of tilapia reaches 250g/tail, it can be fed with complete compound feed, generally twice a day at 9- 10 in the morning and 5-6 pm 1 time, and the daily dosage is 3-4% of the fish weight.

6. Water quality management

(1) Generally, every 5 mu can be equipped with 1 aerator to aerate in time to avoid tilapia floating head.

(2) Fill the pond with fresh water every 3-4 days, with 20-30cm fresh water each time.

(3) If the water quality is found to be deteriorated, it needs to be replaced immediately. Drain the pond of 1/3- 1/2 first, and then replenish fresh water until the water quality is improved.

(4) Generally, quicklime can be sprayed into the pond regularly to keep the pH value of pond water at 7.5-8.5 and the transparency at 25-30cm. The application method is to spray quicklime10-15mg/l throughout the pond.

(5) Note: When adding fresh water, it is necessary to filter the fresh water first, so as to prevent the wild miscellaneous fish from entering the pond to breed, which will affect the growth and yield of tilapia.

7. Prevention and treatment of fish diseases

Tilapia is easy to produce water mold during transportation. Generally, 200-250g chlorhexidine can be sprayed on the whole pond for control.

2. How long is the breeding cycle of tilapia?

1, breeding cycle

The breeding cycle of tilapia is generally 5-6 months, and it can be put on the market after 5-6 months. However, the culture cycle of tilapia is affected by dissolved oxygen, water level, water quality, fertility and other factors, as well as different management methods, so the specific culture cycle of tilapia needs to be determined according to the actual situation.

2. How to shorten the tilapia breeding cycle?

(1) replenish oxygen in time.

① If the water temperature is too high and the culture density is too dense, it will lead to insufficient oxygen in the water and low dissolved oxygen in the water, thus affecting the growth of tilapia. Therefore, in addition to controlling the tilapia culture density, it is necessary to start the aerator 1-2 hours after noon on sunny days to increase the dissolved oxygen in the water.

(2) For ponds with high culture density, it is also necessary to start the aerator at night to avoid hypoxia, and it is also necessary to start the aerator at the right time in rainy days.

(2) Water level

Generally, when the weather is hot, the water in the pond is easy to evaporate, which leads to the drop of water level, thus affecting the growth of tilapia. Therefore, it is necessary to increase the amount of water and raise the water level line. The water level is generally maintained at 2-3m, and fresh water should be replenished at any time to ensure the water body is clean, so as not to prolong the tilapia breeding cycle and affect the time for marketing.

(3) Water quality and fertility should be reduced in high temperature season.

Tilapia requires high water quality and fertility, and proper fertilization is beneficial to its growth. However, in high temperature season, it is necessary to control the amount of fertilization to avoid the influence of water quality exceeding the standard on oxygen content in water. When the water quality exceeds the standard, it can be diluted by injecting new water or adjusted with quicklime.

(4) Strengthen the management of fish ponds

① The season with higher temperature is generally the season with the fastest growth rate of tilapia, and it is also the season with high incidence of fish diseases. Therefore, it is necessary to strengthen the number of patrols and carefully observe the growth and water quality of fish.

② Drugs for preventing and treating fish diseases can be added to fish feed, and water bodies and fish schools can be disinfected regularly to avoid the outbreak of fish diseases.