1. Cultivation requires juvenile shrimp to leave the mother's life, usually in the young shrimp pond. After the juvenile shrimp leave the mother, the broodstock is removed and the young shrimp are left for cultivation. At this time, the average length of the young shrimp is 0.8 cm. After 15 days of cultivation, the body length can reach 2.4-3 cm for the farmers to produce shrimp. (1) The nursery pond requires that the cement pool with an area of ​​20-40m2 and water depth of 0.6-0.8m is preferred for the young shrimp ponds, and the earthen ponds can also be used. However, the new cement pools must be treated with alkali beforehand, requiring close proximity to the water source and good water quality. , Drainage is convenient, anti-escape facilities are built, and ponds are sterilized (the same method as broodstock breeding). After the disinfection, 500 kg/mu of organic fertilizer was applied, and plankton was cultivated for feeding by juvenile shrimp. At the same time set up tree roots, bamboo tube, etc., to provide young shrimp habitat, shells and hidden places. (2) Water requirements 1 Water quality Generally, river water or well water is used, and the water quality should be fresh. At the inlet, filter the influent water with a screen to prevent insects, aquatic animals (such as otters), small fish, shrimp and eggs from entering the pool. During the cultivation period, depending on the residue feed and water quality (such as ammonia nitrogen and other high levels of tri-state nitrogen), it is necessary to regularly change the water to maintain good water quality. 2 The suitable water temperature range is 27°C to 29°C, and the range of change cannot exceed 2°C. If the water temperature is lower than 20°C, the growth rate will decrease, which will seriously affect the survival rate. Therefore, the water temperature should be kept relatively stable during the entire cultivation period. 3 Dissolved Oxygen The juvenile shrimp leave the mother's body and the cultivation pool must be continuously inflated throughout the day so that the dissolved oxygen in the water is sufficient. The PH value of the 4PH cultivation water should be controlled at 7-8.5, which is alkaline. If the water quality is found to be acidic, quicklime can be used to adjust the PH value. With the tap water for the small-scale production of the breeding ground, baking soda can be used to adjust the PH value. 2, breeding technology juvenile shrimp stocking amount is generally 150 ~ 230 tail / m2, pay attention to the same specifications with the shrimp in the pool, and choose sunny morning or cloudy days. After 1 week of stocking, soybean milk can be fed for 3-4 times a day. From the 2nd week on, animal feeds such as small fish, snail meat, cockroach and silkworm cocoon are mainly fed. Paste feed, 1 shot each in the morning and evening, 40% of the daily bait amount in the morning, and 0.25-0.40kg per 10,000 juvenile shrimps in the early days of feeding, and about 10% of the shrimp weight will be fed later. During the cultivation period, change the water once every 10 days for 1/3 of each time; splash lime water once every 20 days, the concentration is about 20g/m3 to adjust the water quality. After 25-30 days of cultivation, the juveniles can grow up to 3cm in length and can be transferred into shrimp culture.
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