I. Pond management It is ideal to use Croton seedlings to thoroughly clear ponds in stocking for 10-15 days. Method: 5 - 7.5 kg per acre pond depth, and then into the altar, add 100 grams of white wine or salt 0.75 kilograms, sealed 3-4 days later, with the pool water to dilute the whole pool with slag splashing. After the toxicity has basically disappeared, add water to a depth of 40 cm. When adding water, it should be filtered at the inlet with a 40-mesh sieve.
Second, post-stocking management
1. Feeding management Green prawns are omnivorous and have different feeding habits at different stages. Feeding plankton at the young shrimp stage. At this time, manure, compost and mixed fertilizers must be properly applied to ensure that the water quality is both fat and cool, so as to ensure the supply of natural baits rich in juvenile shrimp. After being grown up to 2 cm in length, the shrimps feed on the decayed leafy stems, animal carcasses and food baits of aquatic plants, such as rice bran, rind, bean cakes, wheat cakes, cocoons and clams. Animal food. Due to the habit of nocturnal shrimp, feeding should be selected in the evening at 5-6, depending on the amount of food that is fed every other day. In general, the daily feeding amount is 5%-6% of the whole pond shrimp weight. If feeding twice a day, it can be fed as early as 1/3 and later as 2/3. Should be fed in the shallow water around the pond or on the grass, and in the feed to add appropriate trace elements, auxin, dehulling, etc., for its rapid growth, smooth shelling.
2. During the molting period, the clams must be chaffed 13-15 times in their lifetime. The freshly minked shrimps are weak in activity and have no ability to resist predators. They are easily devoured by similar and predator creatures. Therefore, during the molting period, attention should be paid to: first, regulate water quality, lower the water level, and keep the pond grass cover rate at 25%, so as to provide a place for ducks to avoid enemies; second, change the water when the molting is not performed, otherwise, it will cause a large number of deaths; The third is to properly increase the amount of feed fed, and feed quercetin two days before the molting to make it as soon as possible to molt and prevent mutual food.
3, water quality management of shrimp is very sensitive to dissolved oxygen, dissolved oxygen is easy to occur floating head. To inject new water regularly, usually twice a week, so that the dissolved oxygen in each litre of water is not less than 2.5 mg, and maintain a transparency of more than 30 cm, the area occupied by aquatic plants in the pond should not exceed 1/4 of the surface of the water; Attention should be paid to the observation that once fresh shrimp is found ashore, new water should be injected immediately.
Third, shrimp stocking in the end of March stocking overwintering shrimp, shrimp stocking capacity of 2 - 25,000, specifications 1500 - 2000 per kg. When stocking, it should be noted that: 1) The time for the shrimp to leave the water should not exceed 5 minutes; 2) it should be stocked on a rainy day or sunny morning or early evening, and one-time stocking; 3) The shrimp should be stocked after being raised for a day.
Second, post-stocking management
1. Feeding management Green prawns are omnivorous and have different feeding habits at different stages. Feeding plankton at the young shrimp stage. At this time, manure, compost and mixed fertilizers must be properly applied to ensure that the water quality is both fat and cool, so as to ensure the supply of natural baits rich in juvenile shrimp. After being grown up to 2 cm in length, the shrimps feed on the decayed leafy stems, animal carcasses and food baits of aquatic plants, such as rice bran, rind, bean cakes, wheat cakes, cocoons and clams. Animal food. Due to the habit of nocturnal shrimp, feeding should be selected in the evening at 5-6, depending on the amount of food that is fed every other day. In general, the daily feeding amount is 5%-6% of the whole pond shrimp weight. If feeding twice a day, it can be fed as early as 1/3 and later as 2/3. Should be fed in the shallow water around the pond or on the grass, and in the feed to add appropriate trace elements, auxin, dehulling, etc., for its rapid growth, smooth shelling.
2. During the molting period, the clams must be chaffed 13-15 times in their lifetime. The freshly minked shrimps are weak in activity and have no ability to resist predators. They are easily devoured by similar and predator creatures. Therefore, during the molting period, attention should be paid to: first, regulate water quality, lower the water level, and keep the pond grass cover rate at 25%, so as to provide a place for ducks to avoid enemies; second, change the water when the molting is not performed, otherwise, it will cause a large number of deaths; The third is to properly increase the amount of feed fed, and feed quercetin two days before the molting to make it as soon as possible to molt and prevent mutual food.
3, water quality management of shrimp is very sensitive to dissolved oxygen, dissolved oxygen is easy to occur floating head. To inject new water regularly, usually twice a week, so that the dissolved oxygen in each litre of water is not less than 2.5 mg, and maintain a transparency of more than 30 cm, the area occupied by aquatic plants in the pond should not exceed 1/4 of the surface of the water; Attention should be paid to the observation that once fresh shrimp is found ashore, new water should be injected immediately.
Third, shrimp stocking in the end of March stocking overwintering shrimp, shrimp stocking capacity of 2 - 25,000, specifications 1500 - 2000 per kg. When stocking, it should be noted that: 1) The time for the shrimp to leave the water should not exceed 5 minutes; 2) it should be stocked on a rainy day or sunny morning or early evening, and one-time stocking; 3) The shrimp should be stocked after being raised for a day.
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