CATDOLL : CATDOLL: What are the management techniques for stocking and strengthening white shrimp?

1 Seedling density

In order to improve the survival rate of shrimp fry and reduce the management pressure during the grow-out period, the stocking density should be determined first. The stocking density depends on the pond size, water depth, water exchange conditions, oxygenation facilities, breeding methods, seedling size, feed supply, yield and equipment specifications, other equipment and management technology level and experience. Suggestions: For water depths of 1.3 to 1.5 meters, 60,000 to 80,000 shrimps/mu should be stocked; for water depths greater than 1.5 meters, 80,000 to 120,000 shrimps/mu should be stocked; for factory farming, 200,000 to 300,000 shrimps/mu can be stocked (not within the scope of this article). However, in the long run, stocking too many shrimps will aggravate pond aging, uneven shrimp sizes, easy to cause hypoxia, and increase the chance of disease, and the survival rate of the shrimps will also be reduced.

2. Protecting and strengthening seedlings

Protecting seedlings and preventing empty stomachs in the early stages of breeding are also the keys to successful breeding.

① Before stocking, spray with 2 mu/bag of Water Poison Cleaner and 2 mu/bag of Fish and Shrimp Guard, and use it again on the 5th day.

② Use 250g/mu·m of foxtail powder 2 days before stocking, or spray it once every 10 days after the seedlings are planted to control the number of Vibrio.

③ Before feeding, use 4g/kg of bivalent yeast, dilute with appropriate amount of clear water, mix with the feed and ferment for 3 hours, sprinkle and feed in the whole pond, 1~2 times a day, once a day in the middle and late stages; use 2g/kg of growth-promoting bubble king + 2g/kg of multivitamin to mix for 10~12 hours, mix with the feed and ferment for 2 hours, feed once a day (use once every 7 days in the middle and late stages, for 7 consecutive days); use 8g/kg of strong growth promoter to dilute with appropriate amount of water, mix with the feed and ferment for 2 hours, feed 1~2 times a day. Use 5g/kg of Kaiwei Jieduling to dilute with appropriate amount of water, mix with the feed and ferment for 2 hours, feed once a day, for three consecutive days (use once every 7 days before 40 days of age, for 3 consecutive days), and the seedling stage is 30 days.

3 Seedling management

① After stocking the shrimp fry, sprinkle Gaowen C 250g/mu・m + Kaiwei Jieduling 500g/mu・m every 7 to 8 days, and use it for 4 times (i.e. 28 days).

② When the seedlings are 28 to 30 days old, use 400 to 500 grams of Hongbaiqing per mu/m, soak in boiling water for 2 hours and then sprinkle it all over the pond. Then sprinkle it again after an interval of 15 days to prevent the occurrence of bacterial and viral diseases.

1.

Pond bottom: The bottom of the pond is where shrimp fry are most active. When breeding white shrimp, it is necessary to do a good job of maintaining the pond bottom to create a good growth environment for the shrimp fry.

2.

Feeding: When breeding white shrimp, the feed should be changed according to different environments.

3.

Water quality: Water quality is the most basic condition to ensure the growth of shrimp fry. It is necessary to disinfect the water and change the water in time to ensure that the water is clean at all times.

4. Water adjustment: Fine-tuning the water environment can effectively improve the survival rate of seedlings.

It is important to replace the water source of the model with some medicines and buffers, and also pay attention to the control of bacteria in the water source, the way of feeding, the ratio of feed, the inventory of shrimp seedlings, the model and disinfection, and the low temperature weather.

1. Test the survival rate of shrimp fry. Because the shrimps lie motionless at the bottom of the water during the day and move frequently at night. Therefore, we can also use light to observe at night. Since the shrimp fry have just been released, the water color is not very dark, so the activity of the shrimp fry in the pond can be clearly seen under the light at night. If there are few shrimp fry in the pond at night, the survival rate will not be high. 2. The feeding process after stocking should be scientifically divided into shrimp fry stage, young shrimp seedling stage and adult shrimp stage. The food intake is different in different stages. After releasing the shrimp, the general rule of thumb is to observe the growth of the shrimps for the second day after the shrimps are released, and the normal body color and good vitality.