Both green prawns and white shrimp are the main aquaculture economic animals. Polyculture of green prawns and white shrimp can significantly increase the utilization rate of ponds and the economic benefits of breeding. How do we mix prawns and prawns? ?
1, desalination pool construction. About 10 days before the stocking of shrimps of South American Penaeus vannamei, a small pool of about 40 square meters surrounded by plastic membranes is used to desalinate shrimps of Penaeus vannamei. The depth of the pool is about 50 cm, and water per cubic meter of water is disinfected with 0.7 g of copper sulfate. . On the day of stocking the shrimp, the salinity of the desalination tank was adjusted with the coarse salt and the salinity of the shrimp was the same when it was out of the pond. The desalination tank is equipped with a 1.5 kW air pump.
2, desalination pool basic bait cultivation. After diluting the pool water for 7 days, fertilize and cultivate the basic bait to promote the growth of phytoplankton and keep the water color yellow-green or yellow-brown.
3, shrimp cultivation. During the holding period, the water should be tested in time. If the growth of shrimps is good, some membranes can be removed to allow the shrimps to swim out of the desalination pool.
Picture: Penaeus vannamei
4, daily management. South American shrimps have large food intake and excretions, and are in hot weather in summer. The content of nitrite and ammonia nitrogen in pool water is significantly higher than that of the main shrimp pools, and aerators should be opened and used to regulate water quality. Prevent economic loss due to lack of oxygen or deterioration of water quality.
5, sales management. During the aquaculture process, the size of the main culture ponds was found to be higher than that of the polyculture ponds. Penaeus vannamei may have affected the growth of the penaeid shrimps. South American white prawns that have reached the commercial specifications should be sold in time to free water space and reduce food competition. Appropriately increase the feeding of feed, so that there is a little residual bait to meet the growth needs of the shrimp, to prevent the reduction of commercial specifications of shrimp.
Summary: The polyculture of green prawns and white prawn should pay attention to the management of water quality, allow better growth, grow in a good environment, make shrimp less susceptible to disease, and often pay attention to observe the mental state of the shrimp and find bad conditions. Should be dealt with immediately so as not to cause greater losses.
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