Fish feeds and tools are easy to absorb and carry a variety of pathogens during transport, storage, and use. Therefore, in the fishery production, the feeds and tools used should be kept clean and must be sterilized and must not be ignored. Feed disinfection work.
First, feed bleaching and disinfection
1. Bleach disinfecting General plant foods, such as water plants can be soaked in 6ppm bleach solution for 20 minutes to 30 minutes (land plants can not be disinfected); snails and Other general fresh or fresh animal food can be cleaned; farm fertilizer When disinfecting, manure can be disinfected with 500kg and 120g of bleached powder and put into the pool. In addition, a small amount of oxytetracycline residue (mixed at 5% of the amount of bait) can also be added to the food bait for disinfection.
2. Food sterilized and sterilized There are often residual foods in the food field. The residual bait is corrupted and provides favorable conditions for the propagation of pathogens. Therefore, during the epidemic season where the water temperature is relatively high, every 1 week to 2 weeks after the fish eats, the bleaching powder can be used to disinfect the food field once, and the amount thereof is generally 250 grams. That is, the bleaching powder is first melted in 10 kg to 15 kg of water, and then sprinkled on the water surface of the food field for disinfection. Can also be used 250 grams of copper sulfate, plus water dissolving spilled on the edge of the pond and the surface of the food market, to prevent the parasitical diseases of summer flowers and fish, etc. have a good effect.
Second, mildew feed disinfection Summer rain, high temperatures, high humidity, fish feed (especially mixed feed) easy to mold deterioration. If mildewed feeds are used to feed fish, lighter ones may cause disease, while heavy ones may cause poisoning. Because moldy feed contains carcinogenic substances, it can also harm human health through aquatic products. Therefore, after the feed has become mildewed, the moldy feed must be detoxified before it can be used to feed fish. Detoxification methods are as follows:
1. Wash the water and disinfect moldy feed powder (if it is cake feed, it should be broken first, the same below) in the tank, add fresh water (preferably boiled water), soak the feed and stir it with a wooden stick. Once, change the water once, so you can even wash 5 to 6 times.
2. Sterilization Sterilize the moldy feed in a pot, add water to boil for 30 minutes, or steam for 1 hour, then remove the water and use it for feed.
3. Fermentation and disinfection: moldy feed powder is moistened with appropriate amount of clean water, mix well, make its moisture content up to 50% to 60% (hand-grip into a group, let go and loose), allow it to naturally ferment for 24 hours, then add 2kg of wood ash, After mixing and neutralizing for 2 hours, put it in a bag. Rinse with water, filter out the gray water of the vegetation, pour it out and then add the double amount of sugar bran, and ferment at room temperature 25°C for 7 hours. The detoxification effect can reach 90%.
4. Drug Sterilization Mouldy mildew feed powder is soaked in 0.1% potassium permanganate solution for 10 minutes and rinsed twice with water; or add 1% iron sulphate powder to moldy feed powder and mix thoroughly. Cooking for 30 minutes under the condition of °C～100°C can play the role of bacteriostasis and disinfection, increase nutrition and accelerate fish growth.
Third, the tools for purifying and disinfecting fish are often used as vectors for spreading fish diseases. Therefore, tools used in diseased fish ponds should be separated from those used in other fish ponds to avoid cross-contamination of pathogens from one fish pond to another. If the tools cannot be used because of lack of tools, the tools used in the disease pool should be disinfected before use. Generally, the net can be dipped in 10ppm copper sulfate solution for 20 minutes, dried and then used, and the wooden tool can be disinfected with 5% bleach solution, then washed in clean water before use.
First, feed bleaching and disinfection
1. Bleach disinfecting General plant foods, such as water plants can be soaked in 6ppm bleach solution for 20 minutes to 30 minutes (land plants can not be disinfected); snails and Other general fresh or fresh animal food can be cleaned; farm fertilizer When disinfecting, manure can be disinfected with 500kg and 120g of bleached powder and put into the pool. In addition, a small amount of oxytetracycline residue (mixed at 5% of the amount of bait) can also be added to the food bait for disinfection.
2. Food sterilized and sterilized There are often residual foods in the food field. The residual bait is corrupted and provides favorable conditions for the propagation of pathogens. Therefore, during the epidemic season where the water temperature is relatively high, every 1 week to 2 weeks after the fish eats, the bleaching powder can be used to disinfect the food field once, and the amount thereof is generally 250 grams. That is, the bleaching powder is first melted in 10 kg to 15 kg of water, and then sprinkled on the water surface of the food field for disinfection. Can also be used 250 grams of copper sulfate, plus water dissolving spilled on the edge of the pond and the surface of the food market, to prevent the parasitical diseases of summer flowers and fish, etc. have a good effect.
Second, mildew feed disinfection Summer rain, high temperatures, high humidity, fish feed (especially mixed feed) easy to mold deterioration. If mildewed feeds are used to feed fish, lighter ones may cause disease, while heavy ones may cause poisoning. Because moldy feed contains carcinogenic substances, it can also harm human health through aquatic products. Therefore, after the feed has become mildewed, the moldy feed must be detoxified before it can be used to feed fish. Detoxification methods are as follows:
1. Wash the water and disinfect moldy feed powder (if it is cake feed, it should be broken first, the same below) in the tank, add fresh water (preferably boiled water), soak the feed and stir it with a wooden stick. Once, change the water once, so you can even wash 5 to 6 times.
2. Sterilization Sterilize the moldy feed in a pot, add water to boil for 30 minutes, or steam for 1 hour, then remove the water and use it for feed.
3. Fermentation and disinfection: moldy feed powder is moistened with appropriate amount of clean water, mix well, make its moisture content up to 50% to 60% (hand-grip into a group, let go and loose), allow it to naturally ferment for 24 hours, then add 2kg of wood ash, After mixing and neutralizing for 2 hours, put it in a bag. Rinse with water, filter out the gray water of the vegetation, pour it out and then add the double amount of sugar bran, and ferment at room temperature 25°C for 7 hours. The detoxification effect can reach 90%.
4. Drug Sterilization Mouldy mildew feed powder is soaked in 0.1% potassium permanganate solution for 10 minutes and rinsed twice with water; or add 1% iron sulphate powder to moldy feed powder and mix thoroughly. Cooking for 30 minutes under the condition of °C～100°C can play the role of bacteriostasis and disinfection, increase nutrition and accelerate fish growth.
Third, the tools for purifying and disinfecting fish are often used as vectors for spreading fish diseases. Therefore, tools used in diseased fish ponds should be separated from those used in other fish ponds to avoid cross-contamination of pathogens from one fish pond to another. If the tools cannot be used because of lack of tools, the tools used in the disease pool should be disinfected before use. Generally, the net can be dipped in 10ppm copper sulfate solution for 20 minutes, dried and then used, and the wooden tool can be disinfected with 5% bleach solution, then washed in clean water before use.
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