Green prawns are favored by the market and have the biological characteristics of shallow water life. They are suitable for breeding in paddy fields and have high economic benefits. The relevant technologies are now described as follows:
I. Selection and construction of shrimp farms
(1) The paddy fields must first choose the paddy fields that have no water pollution, adequate water sources, and can maintain water and fertility; secondly, they should select the fields that are convenient for transportation.
(b) The construction of raising shrimp farms is to raise the height of the field ridges to a height of 0.7 meters and a width of 1 meter. The second is to dredge into the drainage system to ensure ease of irrigation and drainage; the third is to set a good fishing grate. The water inlet is provided with 40 mesh and 80 mesh double screens, and the water outlet is set with a single screen of 60 meshes. The fourth is to dig trenches and pools. At the distance of 1.5 to 2 meters from the field, the “field†character trench is to be dug, and the groove width is 3 meters. , 0.5 to 0.7 meters deep, "Tian" word ditch in the middle dug an area of ​​40 to 50 square meters, 0.5 to 0.7 meters deep pool, and make the ditch pool connected. Ditch pool area accounts for 40% to 50% of the area.
Second, feeding and management
(1) The rice field is cleared and sterilized with 75 to 100 kg of quicklime per acre before the shrimps and shrimps are stocked for half a month to clear the wild fish, loach, and astragalus.
(b) Seed stocking According to the requirements of the designed amount of shrimp production, 50 to 60 kg per mu of fresh shrimp can be stocked with 30,000 to 50,000 tails (1 cm) and 10 kg of shrimp (2000/kg). Can produce shrimp more than 70 kilograms.
(3) Addition of concealed objects When rice is not planted, concealed objects shall be set up, and water peanuts, water hyacinths, etc. shall be fixed in the ditch or pool with ropes or nets to form a grass belt for shrimps to inhabit and prevent enemy invasion.
(D) Water Quality Management After disinfection, the seedlings are kept for 7 days before stocking, and the water level is maintained at about 50 cm. The application of organic fertilizer is 100 kg of fertilization water per acre to prepare abundant palatable natural food for the shrimp seedlings in Shimoda. After the seed is planted in Shimoda, the water quality in the early stage of cultivation should be strong, and the water should be changed little, and the water should be replaced at a later stage. The transparency of the water should be kept at about 40 cm. In order to increase the calcium content in the water and promote the clams of the shrimp, the lime slurry is splashed every 15 to 20 days and the dosage is 5 kg/mu.
(5) Reasonably feeding feeds The special feeds for shrimps are preferred, and the particle size is fine before and after, and the quality is fine before and after. Feeding 2 times a day, in the morning at 7 to 8 hours, the amount of feeding accounted for 30% of the total amount of feeding, 5 to 6 pm, the amount of feeding accounted for 70%.
Third, the growth of shrimp during the cultivation of shrimp will often appear larger individual differences, usually should be captured large stay small, each year must be cleared once, leaving enough for the next year shrimp species, the remainder sold. This kind of shrimp grows fast, has high specifications, high yield, and good efficiency.
I. Selection and construction of shrimp farms
(1) The paddy fields must first choose the paddy fields that have no water pollution, adequate water sources, and can maintain water and fertility; secondly, they should select the fields that are convenient for transportation.
(b) The construction of raising shrimp farms is to raise the height of the field ridges to a height of 0.7 meters and a width of 1 meter. The second is to dredge into the drainage system to ensure ease of irrigation and drainage; the third is to set a good fishing grate. The water inlet is provided with 40 mesh and 80 mesh double screens, and the water outlet is set with a single screen of 60 meshes. The fourth is to dig trenches and pools. At the distance of 1.5 to 2 meters from the field, the “field†character trench is to be dug, and the groove width is 3 meters. , 0.5 to 0.7 meters deep, "Tian" word ditch in the middle dug an area of ​​40 to 50 square meters, 0.5 to 0.7 meters deep pool, and make the ditch pool connected. Ditch pool area accounts for 40% to 50% of the area.
Second, feeding and management
(1) The rice field is cleared and sterilized with 75 to 100 kg of quicklime per acre before the shrimps and shrimps are stocked for half a month to clear the wild fish, loach, and astragalus.
(b) Seed stocking According to the requirements of the designed amount of shrimp production, 50 to 60 kg per mu of fresh shrimp can be stocked with 30,000 to 50,000 tails (1 cm) and 10 kg of shrimp (2000/kg). Can produce shrimp more than 70 kilograms.
(3) Addition of concealed objects When rice is not planted, concealed objects shall be set up, and water peanuts, water hyacinths, etc. shall be fixed in the ditch or pool with ropes or nets to form a grass belt for shrimps to inhabit and prevent enemy invasion.
(D) Water Quality Management After disinfection, the seedlings are kept for 7 days before stocking, and the water level is maintained at about 50 cm. The application of organic fertilizer is 100 kg of fertilization water per acre to prepare abundant palatable natural food for the shrimp seedlings in Shimoda. After the seed is planted in Shimoda, the water quality in the early stage of cultivation should be strong, and the water should be changed little, and the water should be replaced at a later stage. The transparency of the water should be kept at about 40 cm. In order to increase the calcium content in the water and promote the clams of the shrimp, the lime slurry is splashed every 15 to 20 days and the dosage is 5 kg/mu.
(5) Reasonably feeding feeds The special feeds for shrimps are preferred, and the particle size is fine before and after, and the quality is fine before and after. Feeding 2 times a day, in the morning at 7 to 8 hours, the amount of feeding accounted for 30% of the total amount of feeding, 5 to 6 pm, the amount of feeding accounted for 70%.
Third, the growth of shrimp during the cultivation of shrimp will often appear larger individual differences, usually should be captured large stay small, each year must be cleared once, leaving enough for the next year shrimp species, the remainder sold. This kind of shrimp grows fast, has high specifications, high yield, and good efficiency.