Video of tilapia culture technology

Abstract: tilapia is native to Africa and is similar to local crucian carp, so some people call it "African crucian carp". It has the advantages of miscellaneous diet, fast growth, strong adaptability, less disease, high male rate, high population yield and good meat quality. now it has been comprehensively promoted and farmed. Let's take a look at the technical video of tilapia culture.

Tilapia is native to Africa and is similar to local crucian carp, so some people call it "African crucian carp". It has the advantages of miscellaneous diet, fast growth, strong adaptability, less disease, high male rate, high population yield, good meat quality and so on. Let's take a look at the technical video of tilapia culture.

Cage culture mode

Tilapia can be raised alone, mainly or in combination in cages. The fish species should be of large size, with a tail weight of 10 kilograms and 50 grams. When the dissolved oxygen content is above 3 milligrams per liter, the stocking density is 3 kilograms per cubic meter.

Running water culture mode

Tilapia is one of the main objects of running water high-density culture or "factory" aquaculture. The culture pond should not be too large. Generally, 30-50 square meters of fish should be cultivated, and the dissolved oxygen content of the pond water should be maintained at more than 3 milligrams per liter. Intensive culture needs to be fed with nutritious and comprehensive compound feed, and the protein content of the feed is about 30%. Feed 5 ~ 6 times a day, and the feeding amount is 2.5% ~ 3% of the fish body weight.

Pond culture mode

1. Pond conditions: the breeding site should be selected in a place with shelter from the wind and the sun, sufficient water source, fresh water quality, no pollution, quiet and convenient transportation, with a pond area of 3 mu ~ 5 mu, a water depth of 1.5 to 2 meters, and a pond sediment thickness of 20 to 30 centimeters. Each pond is equipped with a 1.5 kilowatt impeller aerator.

2. Clear the pond and fertilize: clear the pond and disinfect the fish before stocking. Generally in the first and middle of April, clear the pond with 75 kilograms of quicklime per mu, add water to 1 meter after 7 days, and then apply 300 kilograms of rotten manure per mu, which can be put into a small amount of duckweed or duckweed.

3. Fish stocking: when the water temperature rises and stabilizes at more than 15 ℃ in spring every year, winter fry will be released. The pond mainly reared 1500000 fish species per mu, while mixed culture of silver carp and bighead carp species each 40,70, in order to control water quality, and 200,500 fish per mu when mixed with other fish.

4. bait feeding: tilapia can be fed 2 ~ 3 days after entering the culture surface. Tilapia has a wide range of feeding habits. Under the condition of artificial feeding, it can be fed with all kinds of feed, such as wheat, corn, cake and so on. The protein content in the feed should start at 32%-35%, and the daily feed amount should be 3%-5% of the total weight of the fish. When the individual size is about 200 grams, the feeding amount can be adjusted to 2% of the total body weight of fish, and the protein content in the feed is guaranteed to be 27%-29%. When the individual reaches about 300 grams, tilapia enters the period of fastest growth, the daily feed intake is maintained at 1%-2% of the fish body weight, and the protein content in the feed is more than 35%. Feed twice a day at 8-9 a.m. and 3-4 p.m., respectively.

5. Daily management

① measures water temperature and air temperature in the morning, middle and evening every day, pH value and transparency twice a week. One tour of the pond in the morning and one at night.

② fish after entering the pond, to keep the pond water is brown, transparency of 25cm to 30cm. Generally, fertilizer is applied once a week, with 150 kilograms of animal manure per mu each time. When the weather is clear and the transparency of the water body is more than 30 cm, the amount of fertilizer application can be increased appropriately. When the water quality is too fertilised, fertilization should be reduced or stopped, and new water should be injected. In the hot season, the water is usually changed once or twice a week, with 20% or 30% of the pool water each time.

③ insists on healthy farming and operates according to the rules to prevent fish diseases. Wash the fish with 5% salt water or 0.1 mg potassium permanganate solution per liter for 10 minutes for 15 minutes before the seedlings are planted in the pond. Every 10-15 days, the whole pond was sprinkled with 15-20 kg of raw calcareous water per mu to adjust the pH value of the pond to be slightly alkaline, and biological agents were used to improve the microbial structure of the pond and improve the water quality. Turn on the aerator when the dissolved oxygen is low and the fish has a slight floating head.

Paddy field culture mode

1. Stocking preparation: after the completion of the rice field project, two weeks before stocking, the fish ditches and fields were disinfected with 75 kilograms of raw limed water per mu, and the ditches and fields were raked once the next day, so that the lime slurry and silt were fully mixed. One week before seedling release, fermented animal manure was applied to fertilize water, with a dosage of 200 kg per mu to cultivate natural bait in the water.

2. Stocking time: generally, about 5 days after rice transplanting, when the seedlings turn green, they are released. In some places, in order to increase the growth period of fish, the fish are raised in the ditch in the middle of May, and it is also an effective way to open the ditch and put the fish into the field after the seedlings turn green.

3. Stocking methods: fish species with strong physique, strong vitality, no injury and disease, and neat specifications should be selected. The stocking density should be reasonable. Generally, 200,300 tilapia species with specifications of 5 centimeters and 6 centimeters per mu can be stocked, with 150 fish per mu, such as grass carp and carp. The specific stocking amount can be flexibly controlled according to paddy field conditions, water quality environment, drainage and irrigation conditions and management level.

4. Stocking operation: the fish should be disinfected before entering the pond, and the fish should be bathed in 3%-5% salt water for 5 minutes for 10 minutes. The time to release fish should be in the morning or evening on a sunny day, and never release fish at noon on a rainy day or a sunny day.