Green shrimp and Penaeus vannamei Rotating Technology

Green shrimp and Penaeus vannamei Rotating Technology

First, materials and methods Test ponds. The area of ​​8 acres, with a little east-west long, the water level of up to 1.6 meters, the pool slope ratio of 1:1.5, into the drainage convenient, equipped with 3 kilowatts of impeller oxygen pump two, one pump inlet, overhead duct air pump two. 2. The first shrimp. Restocking time In early spring, on January 20, 2003, 25 kg of 400 kg/mu kg of shrimp were put on the mu, which was put on the market by the end of May and the end of May. All of them received 35 kilograms of shrimp, and net income of all expenses was deducted by 400 yuan. mu. 3. The second is the white shrimp of South America. At the beginning of May, we disinfected the pond with clear ponds. To ensure safety, the salinity of the pond's water was adjusted to be the same as the salinity of the nursery 2 days before the start of planting, and was held in the holding pond on May 28. Five hundred thousand shrimp seedlings were placed inside, with an average of 750 tails/m2. After 10 days of depreciation, we opened the Daichi Pond on June 8th and placed 850 crabs (prepared to be kept in the neighboring pond) in the May 12 pond. Second, daily management Water quality management. The water level is just 50cm when the seedlings are released, and bio-fertilizers are used to cultivate enough natural palatability feed. In order to prevent insect-covered seedlings, air-suction air pumps with overhead pipes continue to increase oxygen for 24 hours, add a small amount of fresh water after 10 days, and gradually increase to the highest level afterwards. Halfway every half a month, use Xifei Li 3 tablets per mu to control the water quality. In the meantime, avoid oxygen feeding pump for 1 to 2 hours at noon during the day. At night, be alert and turn on the aeration pump as soon as possible. There is enough dissolved oxygen. 2. Feed the bait. After 3 days of seedling, mainly soybean milk was used, and gradually transferred to high-quality shrimp materials 0#, 1#, and 2#. In the middle and later stages, the 3# material of shrimp and macrobrachium material were gradually transferred to consider the economic benefits. The principle of “four principles” was adhered to, and prior Two observation tables were distributed, and it took exactly one hour to finish. 3. Disease prevention and control. The first time after stocking, the seedlings were added with fresh water combined with the disinfectant dibromohydantoin 0.3g/m 3 Quanchiposa, and then once a month, the specific time should avoid more than 7 days after the use of biological agents. Shrimp seedlings under the full moon, with a good enteritis Ling bait, mixed with food and feed for 2 days, the second month to kill a pest, with fibril must 0.7 grams / m 3. No shrimp disease occurred during the entire culture period. 4. Get caught. The prawn was reared for the last time in 50 days, and the time for the drug was expired. The shrimp cages were caught, and large cages were kept. They were listed one after another and sold off on November 20. The communist goods include 3,250 kg of shrimp, 80 kg of crab, 120 kg of green shrimp, and 100 kg of green shrimp. Mu gains net profit of 6,400 yuan.

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