Application of Tea Cake in Aquaculture

Tea cakes contain hemolytic tea saponins, 11%-16% crude protein, 5%-7% fat, 40% digestible sugar, 11% nitrogen, 0.37% phosphoric acid, 1.23% potassium, and a variety of essential amino acids for animals. It is widely used in aquaculture.

① medicine pond is rich in water. Tea cake is the preferred pond cleaning agent for mixed culture of fish, shrimp and crabs. The method of medicine pond is as follows: in the pond with water depth of 30~50cm, crushed tea cake is 25kg / hm3, and the pond with water depth of 1m can be increased to 50kg/hm3. The tea cake was soaked in cold water for 2 to 3 days and then sprinkled evenly throughout the pond. After 3 hours, the tea cake could kill the fish. After 10 days and 15 days, the toxicity disappeared, and the fish fry could be put into the test water.

② prevents and treats fish diseases. It was carried out one month after the seedlings were put into the pond. Stepping into the four corners and center of the pond with a piece of fresh tea cake every 10 days can effectively prevent fish disease, especially for grass carp.

③ is used to treat water quality and control shrimp and crab diseases. The filamentous bacterial disease of shrimp and crab was sprinkled with 12g/m2 tea cake extract throughout the pond; the fixed ciliosis of shrimp and crab was sprinkled with 10~15g/m2 tea cake extract and changed a large amount of water 24 hours later to promote molting (shell); "shaking disease" of river crab can be treated with 15g/m2 tea cake extract, sprinkled with raw lime water and bait with virus spirit at the same time.

④ is used as fish bait, that is, the fish are fed with virus-free tea cakes. Detoxification can be done by pit fermentation, and it takes 12 days to ferment more than 30 ℃. After the tea cake is fermented to brown and has bubbles and fragrance, take a small amount of detoxified tea cake and try to feed several small fish. if the fish still swim freely after 12 hours, it means that the fish can be fed.