In the process of breeding aquatic products, disinfection of clear ponds is one of the most important links. Many farmers today use quicklime for disinfection and clearing ponds. Because the quicklime has strong alkalinity, it can disinfect, sterilize, kill insects, kill the pathogens of various fish in the water body, and at the same time change the water quality, adjust the pH, make the water become fertilizer, etc., so it is used in the aquaculture industry. Breeding producers are widely used, but if the wrong use of quicklime will also have adverse consequences for the breeding industry, today Xiaobian talks about the precautions for quicklime clearing ponds.
1. Suitable for non-new excavation of fish pond disinfection
Quicklime is commonly used in freshwater aquaculture to kill germs and regulate water quality. However, it is not suitable to apply quicklime for newly excavated aquaculture ponds because there is no silt at the bottom of the newly excavated culture ponds. The buffer capacity is weak and the organic matter is insufficient. If quicklime is applied, It will make the limited organic matter to decompose, further reduce the fertility and increase the difficulty of fertilizing the water in the pond.
Second, should use fresh quicklime
The high calcined calcium content of the quicklime kills the pathogenic microorganisms at the bottom of the pond. Quicklime moisture absorption or adding water will become slaked lime (also known as slaked lime), and the disinfection effect is poor.
Third, the lime slurry should be used now
Immediately after the quicklime is used, it should be sprayed in time to avoid reducing the efficacy. It is generally preferred to splash the lime slurry at noon on a sunny day, and at the same time, the slag of the lime slurry should be filtered out before splashing to avoid accidental swallowing.
Fourth, only for acidic ponds
In general, quicklime is only suitable for use in acidic ponds. In alkaline ponds with a pH of 8 or more in saline-alkali ponds or ponds, it is not possible to use quicklime disinfection or clear ponds.
5. Quicklime cannot be combined with bleaching powder (chlorine-containing preparation)
Lime disinfection or clearing ponds should be used alone and should not be combined with bleaching powders and chlorine-containing preparations. The combination of quicklime and bleaching powder (chlorine-containing preparation) will reduce the disinfection effect. It should be used after five or six days of bleaching powder and other chlorine-containing preparations.
6. Only suitable for the prevention and treatment of bacterial fish diseases
Quicklime is generally only suitable for the prevention and treatment of bacterial fish diseases, and it is not effective for the control of fish parasitic and viral diseases. For the prevention and treatment of parasitic diseases, drugs such as trichlorfon, potassium permanganate, ferrous sulfate and copper sulfate should be used. Prevention of viral diseases can be carried out by adjusting the water environment to prevent or use "three yellow", allicin and other Chinese herbal medicines and fish blood stop, septicemia, povidone iodine, etc., to make a drug bait feeding and prevention.
Seven, pay attention to grasp the technical points
Two methods commonly used for quicklime clearing ponds: dry method clear pond and water clear pond, both clear pond methods should choose sunny weather, start the lime sludge clearing disinfection 10-15 days before seed stocking, and grasp the following technology Key points:
(1) Dry method
When disinfecting, the water in the pond should be drained or left at 7-10cm. Several small pits should be excavated around the bottom of the pond and in the middle. 65-75kg of quicklime per acre, put the quicklime into the small pit, and pour the pulp after the pulp. The hot pool is evenly sprinkled. After 7-8 days, after the drug power has basically disappeared, you can fill the water and raise the fish.
(2) Water clearing pond method
For ponds with poor drainage, you can use water clear ponds. In the disinfection, the pond has a water depth of 1m per mu and 120-150kg of quicklime. After the quicklime is slurried in the wooden barrel, the whole pool is evenly sprinkled. After 7-8 days, after the drug power has basically disappeared, you can fill the water and raise the fish.
Zhejiang Industrial Group Co., Ltd. , https://www.xingyeseafood.com