What are the conditions of Penaeus vannamei farm?

First, the conditions of the breeding ground The breeding ground of Penaeus vannamei is similar to that of Penaeus monodon. The hatchery should be built in the sea area with low salinity. If possible, the hatchery should be built in the brackish inner bay or estuary with salinity of 10 ~ 20 ‰. If there is enough fresh water, the salinity of the shrimp pond can be adjusted as needed. If conditions permit, it can also be solved by drilling wells in the hatchery to extract fresh water. Practice has proved that when the salinity is below 1.5 ‰, the commodity specification (50 ~ 60 pieces/kg) can be reached in about 75 days. Under the same culture density, if the salinity of the culture pond is 20 ~ 30 ‰, it will take more than 100 days to reach the above specifications. It can be seen that suitable salinity can promote the growth of prawns, shorten the breeding cycle and increase economic benefits. The undercover phenomenon of Penaeus vannamei is obvious. Therefore, it is appropriate to use sand mud or sediment as the bottom material in shrimp ponds, which is beneficial to the growth of Penaeus vannamei and reduces diseases. 2. It is advisable to build a shrimp pond with an area of about 5 mu, rectangular shape, length-width ratio of about 3: 1, water depth of 1.5 ~ 2.0 m, and sandy mud bottom; The width of the pond embankment is not less than 2m, and it is best to set a bait platform along the inside of the pond embankment. In hot season, it is best to use a shrimp pond with convenient irrigation, which is about 1.5m deep and has a pot bottom. In recent years, shrimp culture in high ponds along the coast of South China has developed rapidly. Generally, the yield per mu is 400 ~ 500 kg, and 1 year can support two crops. Building a high-level shrimp pond in the high tide zone has the advantages of high yield, few diseases, little influence from bad weather such as typhoon and easy control. The high-level shrimp pond is generally 3 ~ 7 mu in area, rectangular, and 1.8 ~ 2.2m in depth. The dike is of masonry concrete structure, and the bottom of the pond is paved with sand of about 20cm. The shrimp farm is equipped with water lifting facilities and an aerator. The shrimp ponds for Penaeus vannamei culture in Taiwan Province Province generally have an area of 3-7.5 mu and a water depth of 90- 150 cm. The wall of the pond is made of masonry or concrete structure, with separate water inlet and drainage system. The water outlet can also be set in the center of the pond, and the water in the pond is rotated by the water wheel aerator to drive the residual bait and dirt in the pond to gather in the center, and then discharged from the pond through the central water outlet. Water injection is usually carried out by tidal range or water pump. In order to prevent horizontal transmission from contracting shrimp disease, Thailand has also set up a seawater sedimentation tank, and the seawater is precipitated and disinfected before entering the aquaculture pond.