1, pond conditions: pond area of 2-3 acres, water depth of 1.8-2 meters, the substrate for the muddy sandy bottom, the whole pond sprinkled with quicklime before the release of seedlings for disinfection.

2, stocking shrimp seedlings: stocking after the desalination of shrimp species, stocking density of 40 tail / square meter, before stocking the shrimp seedlings into the bag, and then placed in the pond for 15 minutes, so that it adapts to the water temperature and environment.

3, feeding management: regular and quantitative feeding feed, baiting accounted for about 30-40% during the day, 60-70% at night or so, during the feeding period to do a good job of water regulation, oxygenation, prevention and control of disease and other work.

First, the pond conditions

1, in the water supply, clean water in the construction of ponds, pond area to reach 2-3 acres, the depth of water to reach 1.8-2 meters or so, the substrate to the bottom of the mud and sand is appropriate.

2, for the pond to configure a perfect intake and drainage system, the water inlet with a 60-purpose sieve filtration, the addition of fixed-power oxygenation equipment (installation of a power of 1.5 kilowatts of impeller-type oxygenator), in the prescribed time for the supply of oxygen to ensure that the dissolved oxygen content is sufficient.

3, stocking shrimp fry before the pond should be sterilized, in the formal stocking of shrimp fry 25 days before the pond to leave 50 cm of water, and mu 110 kg of quicklime to disinfect the whole pond.

4, after sterilization, 1 week in advance to the pond sprinkled with a certain proportion of bleaching powder, and then apply the appropriate amount of decomposed organic fertilizer, such as chicken manure, which can achieve the effect of fertilization.

Second, stocking shrimp fry

1, select shrimp fry

(1) will be desalinated shrimp varieties as the object of cultivation (try to select the market sales of shrimp fry), or according to the breeding conditions of the pond to choose the corresponding species.

(2) A few days before purchase, you can go to the nursery to observe its desalination, in order to buy assured seedlings.

(3) Before purchasing, you can also carry out non-toxicity testing of shrimp fry to ensure that all the indicators of shrimp fry meet the prescribed requirements, to prevent them from cross-infection.

2, put the seedlings into the pool

(1) for the complete desalination, body length of 2.1 cm or so of shrimp seedlings, per square meter of area can be stocked with 40, shrimp seedlings stocked 1 month after the release of 30-40 bighead carp (specifications for the 0.25 kg / tail).

(2) can also be based on the actual area of the pond to determine the stocking density, generally in the pond can be placed on a fixed grid, and in each grid stocked with a fixed number of shrimp fry, which can effectively control the number of stocking, but also to prevent the shrimp fry swimming.

(3) In order to reduce the stress of shrimp fry, to prevent the phenomenon of massive deaths of shrimp due to the lack of adaptation to the environment, before stocking the bag containing shrimp fry should be placed in the pond to soak for 15 minutes, so that the shrimp fry adapted to the water temperature and the environment, and then dismantle the bag in batches to put into the pond.

Third, feeding management

1, feeding feed

(1) feed feeding to master? Timing and quantity, fixed point and quality, a small amount of multi-casting, specific adjustments? The principle. In the pond set up 3-4 food platform, half a month after the release of seedlings fed four times a day, per 10,000 shrimp fry daily bait for 5 eggs, peanut bran 0.2 kg, 0.75 kg of small fish, 0.3 kg of shrimp material.

(2) and then after half a month, feeding 3 times a day, mainly feeding with feed, feeding amount of 30-40% of the body weight of the shrimp, and at the same time to properly supplement the natural bait.

(3) When the shrimp specifications for 1-3 cm or so, the daily feeding rate of 8-10% of body weight; specifications for 3-10 cm or so, the daily feeding rate of 5-7% of body weight; to the later stages of breeding, the daily feeding rate of 3-4% of body weight. The baiting amount is about 30-40% during the day and 60-70% at night.

(4) Feeding too much, it will cause feed waste, feeding too little, it will affect the growth of shrimp. Feeding time should correspond to the feeding habits of shrimp, which can reduce the impact of bait on the pond water quality.

2, regulate water quality

(1) after desalination of shrimp fry still have seawater habits, so before the release of seedlings to the pool with 50ppm of raw salt, and later discretionary release of raw salt.

(2) Shrimp fry stocking 1 week after the water level should be maintained at 50 cm, and then increased by 5 cm per day until the water depth reaches about 160 cm. Replace 20% of the pool water every 4-5 days and apply quicklime (12-15ppm) every 10-15 days.

(3) In order to provide a good living and growing environment for shrimp, transplant some water hyacinth half a month after the shrimp fry, the area of 20%, and fixed with moso bamboo to prevent spreading everywhere.

(4) open the oxygen pump at the right time, usually in the evening at 10:00 p.m. timed boot, the next morning at 8:00 a.m. shutdown, in case of special circumstances (sweltering heat, rainstorms before the) to boot in a timely manner.

(5) By taking a fixed frequency of water quality monitoring, timely grasp of the changes in water quality, appropriate baiting to reduce the amount of cast and other ways to effectively regulate the pond water quality.

(6) the quality of the water will directly affect the growth of shrimp, in general, to maintain the pH value of the pond water at 7.5-8.5, the transparency of the water to maintain about 30-40 centimeters.

3, regulating the amount of dissolved oxygen

(1) the lack of dissolved oxygen in the water, the oxygen pump can be used to inject oxygen into the water, and then use the dissolved oxygen content detection device to detect the dissolved oxygen content in the water is up to standard, to be the dissolved oxygen content to meet the standard can be discontinued after the oxygen supply.

(2) Dissolved oxygen content in the water is affected by the season, and the amount of dissolved oxygen can be flexibly adjusted during the breeding period.

4, prevention and control of disease

(1) After a period of breeding in the pool will appear more silt, bacteria will also be a large number of reproduction, this time, we should clean up the silt in a timely manner, and do a good job of sterilization, to prevent the deterioration of water quality, the outbreak of disease.

(2) with grid rearing can effectively isolate the virus, prevent the shrimp from infecting each other and reduce the spread of disease. According to the growth of shrimp seedlings, to determine the type of infected disease, and then the right medicine to improve the prevention and treatment of disease.

(3) South American white shrimp are prone to red leg disease and rotting eye disease, red leg disease occurs, the appendages become red, this time to add allicin to the feed, and then feed; rotting eye disease occurs, the sick shrimp will be lurking in the bottom of the pond in the watercress, the eyeballs continue to swell, and later decay, this time to feed to add antimicrobials, continuous feeding for 3-4 days can be effective.

Fourth, timely fishing

1, when there is enough food and the temperature is suitable, shrimp can reach commercial specifications after 60-90 days or so.

2, centralized fishing time is generally the end of September to the beginning of October each year, when the stocking time in March, to June can begin to rotate fishing, fishing principles for the capture of the big stay small, so that you can improve the rate of return.

3, when the water temperature drops to below 14 ℃, shrimp basically stop feeding and growth. At this time, the pool can be drained, and then the remaining adult shrimp catch all.