◠Construction of wintering pool Winter crayfish wintering pool selection area of ​​3 acres -5 acres, slope ratio 1:2.5~3. The leeward sun is bright, the water source is sufficient, there is no pollution, the water depth is more than 1.5 meters. Before draining the shrimp, drain the pool water and thoroughly disinfect it with quick lime. ◠Crayfish winter food cultivation 7-10 days before putting the shrimp into the water and fertilizing, 100-150 kg of cooked manure was applied per acre to cultivate plankton. Transplanted aquatic plants in the pool of water hyacinth, water peanuts, Malai Poziko and other aquatic plants, coverage of more than 40%, the layout should be uniform. Aquatic plants can absorb excess fertilizer in the pond and, through photosynthesis, prevent pool water from becoming oxygen-deficient, while aquatic plants can breed aquatic insects and supplement crayfish animal protein. ◠timely feeding Feed more animal feed before winter to enhance your fitness and improve winter survival. During the winter, the lobsters do not feed, but when the weather is warm, the lobsters leave the cave and feed a small amount. Winter crayfish timely feed small fish, shrimp, snail meat, animal viscera and other animal foods, supplement the body nutrition. ◠adjust the water quality During the winter of crayfish winter, the pool should maintain a water level of 1.5 meters or more to maintain the pool water temperature. If the water level is too shallow, timely replenishment should be done to prevent frozen lobsters from freezing and dying. Water quality should be changed and fertilizer should be changed. Water should be kept at a concentration of more than 4kg/litre, and the transparency should be more than 40cm to prevent the death of crayfish due to lack of oxygen and suffocation. ◠regular tour pool The pool was patrolled twice a day and abnormalities were promptly taken. During the winter, every 10 days and 15 days, 20 kg of lime per acre flood the whole pool, disinfecting the body of water, adding calcium, and preventing diseases. ◠Disease prevention and treatment In winter, it is necessary to prevent and treat crayfish frostbite. Because crayfish are hypothermic animals, they will be frostbite or freeze-dried when the water temperature is below 4 degrees. When the crayfish suffered a frostbite, white muscles appeared in the abdominal muscles. As the disease progressed, the white spots increased from small to large and eventually spread to the entire body. At the beginning of the disease, the crayfish was lying in the shallow grass. When it was serious, symptoms such as paralysis and rigidity appeared. Do a good job of preventing cold and freezing, especially in the early winter. When the natural water temperature drops to 10 degrees, the pool water should be added. In autumn and winter, attention should be paid to the feeding of fatty feeds, such as bean cakes and peanut cakes, to increase the disease resistance of crayfish. During the winter, organic fertilizer or straw can be added to the pool to increase the water temperature. In the later period of shrimp rearing, fishes can be used to remove the fish that harm the crayfish and build a protective net.
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