In August, the temperature is relatively high and there are more thunderstorms. Freshwater aquaculture ponds are prone to flooding ponds, river crabs, black turtle skin disease, and soft-shelled turtle skin perforation diseases. Prevention and active treatment should be strengthened. In August, the pan pool has a relatively high water temperature, a large amount of feed, a large amount of organic matter in the water, and an increase in oxygen consumption. Especially in hot nights or in thunderstorms, it can easily cause the lack of oxygen in the pond. When it is predicted that a floating head may have occurred or a floating head has occurred, it shall be filled with fresh water or an aerator in time. At the same time, the fertilization shall be stopped, and the feeding amount shall be controlled. The pond with difficulty in changing the water and the pond without an aerator installed may frequently hit water at the surface of the pond. With yellow muddy water, alum water, gypsum powder water, salt water and other splashes, clarification of floating suspended solids. The poor water quality of river crabs is the main cause of the disease. The gills of the crabs are dark gray or black, and when they are severe, the gills all become dark. Preventive methods: Sprinkle lime, photosynthetic bacteria, or water improvers on a regular basis, diligently fill new water, and maintain a good water quality environment. treatment method (1) 0.2 g of dibromohydantoin solution per cubic meter of water is sprayed on the whole pool. Each 3 cubic days of water use 5 grams of photosynthetic bacteria and water to be splashed once. After 5 days, 2 grams of photosynthetic bacteria per cubic meter of water are added. Quanchiposa 1 time; (2) Each cubic meter of water shall be sprinkled with 0.3 grams of water for disinfecting and adding water to the whole pool. Every 100 kg of crabs shall be fed with 10 to 15 grams of combo for 5 to 6 days. The soft-shelled turtle perforation disease in the feeding process will be divided in time to ensure that the turtles in different sizes, to avoid excessive density caused mutual attacks and injuries. Every 3 to 10 days, 3 to 5 grams of photosynthetic bacteria per cubic meter of water should be added to the pool for 1 splash. When the turtle is caught and transported, it is best to carry water throughout the operation. The operation minimizes the possibility of injury to the surface of the turtle. For soft-shelled turtles with scratches and scratches, potassium agglutinate solution with strong astringency and fast drug properties can be used to bathe the wounds to achieve antibacterial effect. treatment method (1) Spread the affected area with vanguardomycin ointment, or use a 10 mg/L aureomycin or streptomycin solution for medicated bath; (2) Feeding with the "Qi Bi Kang" feedstuff developed by Shanghai Fisheries University, once a day, for 7 days; (3) Each kg of soft-shelled turtle is fed with 60 grams of Chinese herbal medicine such as Houttuynia cordata, Radix isatidis, honeysuckle and wild chrysanthemum. (4) Addition of drying platforms to create a good sun back environment for soft-shelled turtles, soft-shelled turtles can accelerate the growth rate through the sun back, but also to speed up the recovery of skin perforation.
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