1. The year of the waters. Ponds or farmed rice fields are generally used in two forms. Overwintering in ponds: To select rules, shelter from the sun, ponds with water depths of 1.5 meters or more and more plants. Winter in paddy fields: The holding pool must be large and deep, and the holding pool should be cleared. If the cultivated paddy fields do not grow other crops in the fall, they can fill the fields with water before wintering and leave the fields for winter. In wintering ponds, some water peanuts or willow roots should be placed to provide good insulation conditions for wintering crabs.
2. Stocking density. Wintering of broodstock: picking a healthy physique, complete appendages, standard size prawns, female size 140~500/kg, male size 140~240/kg, male/female ratio 1:1, per square Rice can be placed in a range of 30 to 60 grams of 2000 to 3000 tails per kilogram of juvenile shrimp. Juvenile Crabs Overwinter: 40 to 70 juvenile crabs of 100 to 300 baits per kilometer.
3. Daily management. During the winter, shrimps and crabs still need to eat a small amount of food in order to maintain their life and physical energy consumption. In sunny and warm weather, it is usually fed once every 2 to 3 days. The feed is small and refined. The commonly used small trash fish, silkworm cocoon powder, crushed snails, bran, etc., each feeding amount should be controlled in the weight of overwintering shrimps and crabs. Within %. At the same time, during the winter, it is necessary to stick to the patrol pond and regularly fill the water to maintain the water level, especially to prevent water rat and waterfowl from attacking. In addition, in the severe winter season, it is necessary to prevent the pool water from freezing. If the ice formation is too thick, it must be broken or holed in time to avoid the death of shrimps and crabs due to lack of oxygen.
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