The cultivation of green prawns in Pak Pak Tin can make full use of the ecological environment of the Pak Tin water body and improve economic efficiency. 1 ? Field selection Choose water retention, drainage and convenient fields, each area of ​​2-5 acres. 2? Engineering construction along the side of the field ridge 2-3 meters away from the field hoe 3-5 meters wide, 0.8-1 meters deep ring-shaped shrimp ditch. Widen and deepen one section of the shrimp ditch into a holding pool with a width of 4-8 meters and a depth of 1.5 meters. The area of ​​shrimp ditch and holding pool accounts for 10%-20% of the total area of ​​Cangbai. Built into the drainage system. The water inlet is sealed with a wire tight mesh to prevent entry of predator organisms with water; the drainage port must be compacted in addition to the wire mesh net. Twenty days before stocking, shrimp ditch was disinfected with quicklime. After the toxicity disappears, add water to make the shrimp ditch water level reach 0.6-0.8 meters. Apply 500-600 kilograms of livestock and poultry manure per acre to fertilize water quality. 3 seedlings stocked with special pool cultivation. It is also possible to use a section of shrimp ditch or temporary holding pool and to block it with a dense mesh net and put egg-bearing shrimps into the seedlings. Each mu of Daejeon is used to feed 200-250 g of 4-6 cm long egg-holding shrimp. After 1 month, 15,000 to 20,000 larvae, 1.5 cm in size, can be bred. After 7 to 10 days after transplanting, the shrimp will be stocked in the ditch. 4. Feeding and management The quality of water for fertilization, feeding, and daily management are similar to those for shrimp rearing in rice fields. The water quality management focuses on the following tasks: In the initial stage of shrimp rearing, the depth of the shrimp ditch should be maintained at 0.6-0.8 meters; after July, it should be deepened to more than 1 meter to allow the shrimp to feed on the field; the water level should be reduced to 1 meter before harvesting. Following, gradually introduce the shrimp into the ditch. During the high-temperature season from August to September, we insist on changing the water every 7-10 days, changing the water one third at a time to ensure good water quality.
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