1. Management of open-air ponds. (1) The sun lamp cannot be used for warming at night because the light will attract fish and shrimps to the surface of the pond and suffer frostbite and freezing; try not to open the aerator to reduce convection on the pond and reduce the water temperature drop rate at the bottom of the pond to achieve antifreeze. Objectives; (2) Do not pull nets, transport, or diverting ponds during freezing or rain or snow to avoid secondary damage to the fish body due to mechanical damage; (3) Adhere to the morning, middle, and evening patrols to monitor the water temperature. , water quality, timely removal of dead individuals to prevent dead fish rot corrupted water; (4) strengthen water quality management, timely removal of pond water surface ice, choose to change the water before or after sunny noon every month 1 or 2 times, but during the cold current, do not add water, Prevent water temperature from falling; (5) After water temperature rises and stabilizes, use irritation-reducing iodine preparations to disinfect water bodies, or throw or sprinkle 15 kg of quicklime or use sediment modifier; in ponds with frostbite or dead fish, do not use disinfectant immediately. Prevent fish and shrimp from undergoing stress reaction and accelerate death; (6) According to temperature changes, take timely and appropriate multiple feedings of high-quality feed; but do not rush to feed in the early rise of water temperature. Feed to prevent fish from floating and causing frostbite. 2. Wintering shed management. (1) Clear the snow on the shed in time to repair the damaged film; check the thermal insulation equipment, supplement the fuel needed for heating, and ensure the normal operation of the greenhouse; before and after noon when the weather warms up, the two ends of the film set off 2 to 3 meters each To circulate the air, cover it before sunset. (2) Generally feed 1 time around 3 o'clock in the afternoon, feed the multi-dimensional or immuno-enhancing agent concentrate feed to enhance the fish's ability to resist cold. (3) A small amount of water is changed 1 to 2 times before and after noon on a sunny day every month, and 15 kg of quicklime is splashed regularly for 1 to 2 times. 3. Recovery after the disaster. When suffering from frost damage, take timely measures to reduce losses and resume production as soon as possible. It usually starts after the temperature rises and the pond water temperature stabilizes above the lower limit of the appropriate temperature range. (1) Grasp the repair facility. Such as frozen cultivation facilities, access to drainage channels, damaged fishing boats and diesel engines, damaged fishing nets, cages and collapsed houses. (2) Check the number of fish and adjust the density. The amount of fish stored can be determined based on the number of dead fish or fish fed on the net or ingestion. The loss is less than 50% compared with that before the disaster. The loss can be taken by adding other varieties and intensively cultivated; the loss is greater than 50%. And pond (box). (3) Unoccupied ponds (cage boxes) may be re-introduced into other fast-growing, good-quality varieties, or used in empty pools. (4) Ponds (cage) after supplementing seedlings or ponds (boxes) should be strengthened for management and scientific feeding. Use high-quality feeds to facilitate recovery of body composition of fish; reduce disturbances, avoid increasing damage and consume physical strength; observe changes in water color, detect dissolved oxygen status in water bodies, and promptly adopt measures such as replenishing water and water, using water quality improvers and probiotics. (4) Do a good job of preventing diseases and prevent epidemics. Remove dead fish (including buried mud) in time, clean the bottom of the pool with a bottom modifier such as zeolite powder or biological methods. Strengthen monitoring and report major epidemics immediately to prevent epidemics. Kn95 Protective Mask,N95 Respirator Face Mask,Kn95 4 Ply Mask,N95 Disposable Mask KUTA TECHNOLOGY INDUSTRY CO.,LIMITED , https://www.kutasureblue.com