1. Prepare ponds and grow water.
(1) Pond conditions: The pond should be rectangular, with an area of ​​3-5 mu, suitable for water retention at the bottom, water depth of 1.3-1.8 meters, no water pollution, and easy access to the pond. The inlet should be provided with a 60-mesh sieve.绢 Filtration to prevent the entry of enemies.
(2) pond preparation: A clear pond disinfection; B added concentrated seawater or agricultural salt.
2, shrimp stocking.
(1) Quality requirements for seedlings: Shrimp seedlings require the selection of robust and lively, slender body, neat size, clean surface, sensitive to external stimuli, and obvious directional shrimp when swimming. The stocking specifications are the best. It is more than 2cm, and generally it should reach 0.8-1.0cm. The shrimp seedlings should be reduced to less than 5‰.
(2) Shrimp stocking: The stocking season is from late March to mid-April. Generally, the second quarter of farmed shrimp is released in the second quarter from late July to late August.
(3) Stocking densities of shrimp: General stocking density specifications are 0.7-1.0cm for 3-50000 tails/mu, specifications for 2.0cm stocking density is 2-30000 tails/mu.
3, aquaculture management.
(1) Water quality control: Concentrated seawater is lightly cultured. The cultured white shrimps of South America adopt a closed culture method. During the whole breeding process, the water is not changed or the water is changed little to avoid the invasion and infection of diseases in the natural sea area. According to the condition of the water, some fresh water can be added, but the salinity in the pool water must be maintained at more than 1 ,. If necessary, add some salt (after splashing the whole pond), the water quality of the pond should be kept fresh, generally 3-5 mus of pond installation. For 1-2 aerators, the aerator should be installed near the pool so that the water body can be fully rotated.
(2) Feeding: Feed the shrimp into the pond within half a month, mainly feeding on the basic bait in the pond, and assisting in cooking the minced freshwater surimi or egg yolk. Half a month later, artificial compound feeds were mainly used. Due to the habit of nourishing the white shrimp, the amount of feeding during the day is about 20%-30%, and the amount of feeding is about 70%-80% at night. Generally, before the weight reaches 10 grams, the amount of bait is the weight. 6.4%; weight 10-15 grams of feeding weight 4.6% of body weight; weight greater than 20 grams, feeding amount of 3.2% of body weight, while according to water quality, can be fed a small amount of washed minced snails and freshwater miscellaneous Fish to enhance prawn physique. However, it is forbidden to feed fresh seafood bait during the breeding process to prevent virus infection. (3) Daily management: Stick to early, middle, and evening patrol ponds, observe the changes in water quality, check the feeding conditions and growth of shrimp, adjust the amount of feeding and improve management measures. (4) Disease prevention and control: Adhere to the principle of prevention and prevention and control. Strict control of shrimp seedlings and feed should be taken to prevent the occurrence of diseases. In addition, pests in culture ponds should be promptly removed, such as leeches and leeches.
4, harvest. Penaeus vannamei began harvesting after 60-80 days of breeding up to commercial specifications (60-80/kg). The method of harvesting uses the method of “Famous Net†combined with the method of pulling nets to arrest, capture large and small, and finally catch the pond.
(1) Pond conditions: The pond should be rectangular, with an area of ​​3-5 mu, suitable for water retention at the bottom, water depth of 1.3-1.8 meters, no water pollution, and easy access to the pond. The inlet should be provided with a 60-mesh sieve.绢 Filtration to prevent the entry of enemies.
(2) pond preparation: A clear pond disinfection; B added concentrated seawater or agricultural salt.
2, shrimp stocking.
(1) Quality requirements for seedlings: Shrimp seedlings require the selection of robust and lively, slender body, neat size, clean surface, sensitive to external stimuli, and obvious directional shrimp when swimming. The stocking specifications are the best. It is more than 2cm, and generally it should reach 0.8-1.0cm. The shrimp seedlings should be reduced to less than 5‰.
(2) Shrimp stocking: The stocking season is from late March to mid-April. Generally, the second quarter of farmed shrimp is released in the second quarter from late July to late August.
(3) Stocking densities of shrimp: General stocking density specifications are 0.7-1.0cm for 3-50000 tails/mu, specifications for 2.0cm stocking density is 2-30000 tails/mu.
3, aquaculture management.
(1) Water quality control: Concentrated seawater is lightly cultured. The cultured white shrimps of South America adopt a closed culture method. During the whole breeding process, the water is not changed or the water is changed little to avoid the invasion and infection of diseases in the natural sea area. According to the condition of the water, some fresh water can be added, but the salinity in the pool water must be maintained at more than 1 ,. If necessary, add some salt (after splashing the whole pond), the water quality of the pond should be kept fresh, generally 3-5 mus of pond installation. For 1-2 aerators, the aerator should be installed near the pool so that the water body can be fully rotated.
(2) Feeding: Feed the shrimp into the pond within half a month, mainly feeding on the basic bait in the pond, and assisting in cooking the minced freshwater surimi or egg yolk. Half a month later, artificial compound feeds were mainly used. Due to the habit of nourishing the white shrimp, the amount of feeding during the day is about 20%-30%, and the amount of feeding is about 70%-80% at night. Generally, before the weight reaches 10 grams, the amount of bait is the weight. 6.4%; weight 10-15 grams of feeding weight 4.6% of body weight; weight greater than 20 grams, feeding amount of 3.2% of body weight, while according to water quality, can be fed a small amount of washed minced snails and freshwater miscellaneous Fish to enhance prawn physique. However, it is forbidden to feed fresh seafood bait during the breeding process to prevent virus infection. (3) Daily management: Stick to early, middle, and evening patrol ponds, observe the changes in water quality, check the feeding conditions and growth of shrimp, adjust the amount of feeding and improve management measures. (4) Disease prevention and control: Adhere to the principle of prevention and prevention and control. Strict control of shrimp seedlings and feed should be taken to prevent the occurrence of diseases. In addition, pests in culture ponds should be promptly removed, such as leeches and leeches.
4, harvest. Penaeus vannamei began harvesting after 60-80 days of breeding up to commercial specifications (60-80/kg). The method of harvesting uses the method of “Famous Net†combined with the method of pulling nets to arrest, capture large and small, and finally catch the pond.
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