1, choose a pond: in the water quality is fresh and no industrial pollution in the construction of breeding ponds, pond sugar area is generally 5-20 acres, the depth of water for 2.5-4m, the requirements of the pond bottom is flat and solid pond base, there can not be tall around the sun barrier. 2, the whole pond clearing: the pond will be drained of water and then exposed to the sun more than 1 week, and then use quicklime 225mg / L splash the whole pond disinfection. 3, cultivate the water: after the toxicity of the drug disappears, it can be filtered into the 60-mesh sieve silk screen. 3, cultivate the water quality: after the toxicity of the drug disappears, you can use 60 mesh sieve silk screen to filter the water.

A, tilapia how to culture the fastest growth

1, select pond

(1) Selection

General need to have sufficient water, water quality, no industrial pollution and convenient transportation to build breeding ponds.

(2) pond

Pond sugar area is generally 5-20 acres, water depth of 2.5-4m, flat bottom, pond base is strong and has good water retention properties, requires good ventilation around and no tall sun block.

2, the whole pond clearing

(1) before stocking, the pond should be drained, exposure to the sun for more than 1 week, in the sun during the pond, but also need to repair and strengthen the pond foundation.

(2) Generally, dry ponds can be disinfected by sprinkling quicklime 225mg/L all over the pond, and note that new water cannot be introduced three days after the pond is cleared, so as to avoid affecting the effect of pond clearing.

3, cultivate the water quality

(1) generally about 7 days after the pond, to be drug toxicity disappears, with a 60-mesh sieve silk screen filter into the water 70-80cm and mu of organic fertilizer 300-400 kg, in order to cultivate plankton, to provide bait for tilapia.

(2) When the water quality becomes fertilized, you can gradually add water to 1m, when the seedlings into the pond, with the rise in water temperature and fish growth, and gradually add water to the pond to the maximum depth of water storage.

4, stocking fry

(1) Selection of fry

① Need to select the body surface smooth and injury-free, robust, full-bodied fish, neat specifications, high male rate and specifications in the 5cm or so of the tilapia fry for stocking.

② Before stocking the fish need to be washed with 5% salt water before being released into the fish pond.

(2) stocking of fish fry

① Determine that the pond water is non-toxic, you can put tilapia fry in accordance with the 1 tail / cubic meter of water, generally per mu can be appropriate with 50g / tail of the big head of 40-50, 30g / tail of silver carp 30-40.

② When the specification of tilapia reaches 100g/tail, 30-50 southern largemouth catfish can be appropriately placed per mu.

5, feeding management

(1) in the tilapia specifications have not reached 150g, can be taken with fertilizer farming, that is, the animal manure into the pond wash, as a way to cultivate biofeeding, usually fertilization once a week, each time 100-150 kg per mu.

(2) When the specification of tilapia reaches 250g/tail, full-price feed can be used to feed tilapia, usually feeding feed 2 times a day, in the morning at 9-10 am and in the afternoon at 5-6 pm each feeding 1 time, the daily amount of 3-4% of the weight of the fish.

6, water quality management

(1) generally every 5 acres can be equipped with an oxygenator, timely oxygen, to avoid tilapia floating head phenomenon.

(2) Every 3-4 days you need to add new water to the pond, each time you inject new water 20-30cm.

(3) If you find that the water quality is getting worse, you need to change the water immediately, first drain 1/3-1/2 of the pond, then add new water until the water quality gets better and then stop.

(4) Usually, lime can be sprinkled into the pond every once in a while, so that the pH value of the water is always maintained at 7.5-8.5, and the transparency of the water is maintained at 25-30cm, and the method of use is to sprinkle lime in the whole pond at 10-15mg/L.

(5) Attention: When adding new water, you need to filter the new water first, and filter out the wild fish, so as to avoid that the fish enter into the pond and reproduce, which affects the growth of the tilapia. breeding, affecting the growth of tilapia as well as production.

7, the prevention and control of fish disease

In the process of transporting tilapia is prone to water mold disease, generally per mu of the whole pond can be splashed with chloroquine 200-250g for prevention and control.

2, tilapia farming cycle how long

1, farming cycle

tilapia farming cycle is generally 5-6 months, usually 5-6 months after the breeding can be listed for sale, but the tilapia farming cycle by the amount of dissolved oxygen, the water level, the water quality of the fertilizer, different management methods and other factors. However, tilapia culture cycle is affected by dissolved oxygen, water level, water fertility, different management methods and other factors.

2. How to shorten the culture cycle of tilapia

(1) Timely supplementation of oxygen

① Water temperature is too high, and the culture density is too dense will lead to insufficient oxygen in the water, resulting in the dissolved oxygen in the water is too low, which will affect the growth of tilapia. Therefore, in addition to the need to control the breeding density of tilapia, it is also necessary in the higher degree of the season, after noon on sunny days, open 1-2 hours of oxygenator, increase the amount of dissolved oxygen in the water.

② For the breeding density of higher ponds, in the evening also need to open the aerator, to avoid lack of oxygen, rainy days also need to open the aerator at the right time.

(2) water level

Generally in hot weather, the water in the pond is easy to evaporate, resulting in a decline in the water level, which affects the growth of tilapia, so you need to increase the volume of water to improve the water level line, the water level line is generally required to maintain 2-3m and add new water at any time to ensure that the water body is clean, to avoid prolonging the tilapia culture cycle, affecting the time of listing for sale.

(3) high temperature season need to reduce the water fertility

Tilapia for water fertility requirements are high, appropriate fertilization is conducive to its growth, but in the high temperature season need to control the amount of fertilizer, to avoid over-fertilized water to avoid the impact of the oxygen content of the water, when the water quality of over-fertilized water can be injected into the new water diluted or adjusted with quicklime.

(4) Strengthen the management of fish ponds

① The season of higher temperatures is generally the fastest growing season of tilapia, but also the season of high incidence of fish disease, so you need to strengthen the number of patrols, carefully observe the growth of the fish body and water quality conditions.

② can be added to the fish feed to prevent fish disease medicine, and regularly disinfect the water and fish, to avoid the outbreak of fish disease.