Penaeus vannamei is an excellent species that can be cultured in seawater, brackish water and pure fresh water. However, in recent years, the deterioration of its shrimp varieties, poor disease resistance, and high incidence have brought troubles to the monoculture mode of P. vannamei. Some farmers in the downtown area began to try grass-fish pond polyculture models and achieved better economic benefits. Now the farming experience is introduced as follows. I. Preparation before cultivation 1. Pond conditions. Choose a pond with abundant water resources and convenient transportation, with an area of ​​5-10 acres, a water depth of 1.5-2.5 meters, a flat bottom, shallow sludge, and a corresponding oxygen-increasing equipment. 2, pond cleaning and disinfection. Sludge is removed from the bottom of the pond and the depth is not more than 10 cm; the bottom of the pond is disinfected with quicklime of 100 kg/mu and the drying pond is for about 15 days. Second, seed stocking 1, stocking time. Grass carp and whitefish bloomed in February and March, and the water temperature began to rise above 12°C. In the middle of May, Penaeus vannamei seedlings began to have water temperatures above 20°C. The specific stocking time was based on the weather and seed supply time. 2, the number of stocking. Grass carp 400-800 tails/mu, with white pheasant 80 tails/mu, flower pods 30 tails/mu. Penaeus vannamei stockings of 1000-15000/mu. Third, aquaculture management 1, feed feeding. Scientific feeding, adhere to the principle of four, we must feed the fish before feeding shrimp, feed the shrimp immediately after feeding the fish. The amount of shrimp fed is based on observations of the feed table, water quality, weather, and shrimp growth. 2, water quality regulation. Treat fresh water 10 cm every 7-10 days depending on water quality, and try microbial preparation every 10-15 days. Regularly and regularly open aerators to increase dissolved oxygen in the water. 3, disease prevention and treatment. In addition to regular water changes and the use of microbial preparations to improve water quality, drug prevention is also required. Drugs with little residue and little irritation are regularly used to disinfect pool water, and some anti-stress drugs such as multi-dimensional shrimp and immune polysaccharides are used internally. Heat Herbal Sticks,Heat Stick Device,Tqs Herbal Stick,Heat Sticks KOKEN Co., Ltd , https://www.hnb-maker.com
Technical points of polyculture Penaeus vannamei in grass pond