First, put a good off 1. Strict disinfection First clear pond disinfection. All kinds of fish can be raised temporarily, and 120 kg of lime can be disinfected at a rate of 1 meter per 0.067 hectare of water, and the water can be fertilized according to conventional methods. After the disappearance of the medicine, the fish species will be returned. The second is the disinfection of fingerlings. Use salt, bleach, potassium permanganate and other substances to disinfect the drug to prevent it from entering the pool. 2. Select the appropriate temperature winter fish species should choose the water temperature between 6 ~ 10 °C sunny days. 3. Select the size of the fish species. The size of the fish is about 11 cm. The herring, grass carp, clams and clams are about 13 cm. The fish species that are too small are not suitable for winter feeding. Special pools should be used for cultivation. At the same time, the fish species to be put to the fins are non-destructive, the physique is robust, disease-free, and the scales are intact. 4. Pay attention to frequent inspections after the inspection of the fish species. Once the weather is getting colder and the temperature has dropped significantly, the water level should be deepened in a timely manner and the water temperature must be reduced. As the water temperature increases on sunny days, some fine feeds can be put in order to promote rapid growth and development of fish species. Second, put a good oxygen off 1. Determine the oxygen content of water in the fish farmers, should use the equipment every 10 to 15 days to test the water dissolved oxygen situation. When the amount of dissolved oxygen in the pool is reduced to 3 mg per liter of water, the pool water should be oxygenated in time. Fish farmers who have not tested dissolved oxygen equipment can be replaced by observation methods. If the water is dark and dark, there is foul odor, or zooplankton and fish, shrimp, etc., are found frequently at the pond, it can be judged that the pond water is bad, and oxygen must be increased. 2. There are three ways to increase oxygen and oxygen in time: one is water injection and oxygenation; the other is water-removal and oxygen-enhancement, lack of water source ponds, and most pumping water can be pumped out to make the pool water and air fully in contact with the oxygen. Dissolve in the water in the pool, then re-inject the extracted water into the pond; third, use aerator to increase oxygen. Third, a good prevention and control 1. Red skin disease found that the fish suffering from erythroderma disease, to be sprinkled bleaching powder at the side of the pond, the concentration of one millionth. At the same time, the sulfathiazole baits were administered. On the first day, 5 grams of fish were used per 50 kg of fish on 0.067 hectares, and 2.5 grams of medication was used each day for a week later. The medicine was mixed with rice bran, wheat bran, flour, etc., and fed once a day until the elimination of red skin disease. 2. The main cause of watery mildew disease is wintering and pooling. The carelessness of the operation causes the skin of the fish to be injured and the water mold invades the wound. Control methods: 1 Care should be taken when pulling nets and handling to prevent fish injuries; 2 For diseased fish ponds, 4/10000 salt and baking soda solution can be splashed on Quanchipia; gallnut can be used as a liquid, even with juice. Slag Quanchiposa; If the condition is serious, you can increase the concentration of gallnut liquid, spilled twice a day, sooner or later, so that the concentration of pool water solution is 4 parts per million. 3. Small white spots of varying sizes appear on the body surface or sacral part of the small melon worm disease, and the fins have a small white spot. Control methods: 0.1 to 0.210E-6 can be used to splash the whole pool of mercuric nitrate; or per cubic meter of water with dried chili powder 0.35 grams, 0.11 grams of ginger add water to cook, Quanchiposa, can be used twice.
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