Crayfish fresh water culturing method

Abstract

The invention discloses a method of culturing lobsterlings in fresh water, comprising: excavating an enclosed culture channel at a water inlet of a rice paddy; secondly, forming a culture region around the channel by mesh, building anti-escaping facilities at the water inlet and the water outlet of the rice paddy, for preventing external infraction and self escape of shrimps seedlings; thirdly, applying enough ground fertilizer, cultivating the parent shrimp after and before transplanting rice seedlings, sterilizing the channel before pasture, planting water weeds in the channel after one week; fourthly, culturing the parent shrimp of 10-22 kg per mou, and channel density 5-25 / m2; fifthly, catching for sale. The invention method is simple, convenient in operation, low in cost, high in production and good in quality.

Description

technical field

[0001] The invention relates to the technical field of shrimp cultivation, and more specifically relates to a method for freshwater cultivation of crayfish. Background technique

[0002] Crayfish originated in North America and are commonly known as freshwater crayfish. In terms of classification, they belong to the crustacea Arthropoda. It was introduced into China after 1929 and has spread all over the country. With the continuous improvement of people's living standards, the market consumption and export volume are increasing rapidly, but the natural wild resources are far from meeting the demand. Therefore, it is the only choice to meet the increasing demands of processing export and market consumption through artificial scientific freshwater aquaculture. At present, there are three main methods of crayfish farming: 1. The form of feeding shrimp, 2. The form of feeding shrimp, and 3. The form of raising shrimp. The first form of stocking is to stock se...

Examples

Embodiment 1

[0012] The culture method of crayfish is: 1, excavate an area to account for 2-12% of the total area of ​​the paddy field at the water inlet of the paddy field, deep 0.6-0.8 meter, wide not less than the enclosure ditch of 2.8 meters. 2. The mesh around the ditch is 0.7-1.07 cm to form a breeding area. Anti-escape facilities must be established at the water inlet and outlet of the paddy field to prevent external invasion and self-escape of shrimp seedlings. 3. Apply sufficient base fertilizer, preferably 500-800 kg of organic fertilizer per mu. Broodstock shrimp can be stocked before and after transplanting seedlings. Before stocking, the ditch must be disinfected, and quicklime can be used for disinfection. After a week, Elodea For aquatic plants such as bitter grass or water peanuts, the coverage rate should not be lower than 50% of the water surface. When stocking the broodstock shrimps, they should also be disinfected. They can be soaked in a solution of 1 / 10,000 potassiu...

Embodiment 2

[0014] The method of cultivating crayfish in rice fields is: use the original ring ditch in the paddy field, but the ring ditch must be no shallower than 0.6-0.8 meters and the width is no less than 2.5 meters. A breeding area is surrounded by asbestos tiles at the water inlet. Accounting for 2-12% of the total paddy field area, the bottom end of the asbestos tile is inserted into the mud to ensure the firmness and applicability of the enclosure. The paddy fields outside the ditch are normally plowed and planted according to the rice cultivation requirements. For the needs of breeding, anti-escape facilities are also established at the water inlet and outlet of the paddy field to prevent predators and shrimp seedlings from escaping. Broodstock shrimp can be stocked before and after transplanting seedlings. Before stocking, the ditch is advanced with water, the depth is not less than 25 cm, and the water is disinfected with quicklime. A week later, aquatic plants are also plant...

Embodiment 3

[0016] The rice field culture method of crayfish is: excavate at the water inlet end of the rice field to form an enclosure ditch with an area of ​​4-12% of the paddy field area, a depth of 0.6-0.8 meters, and a width of not less than 5 meters. The plastic sheet forms a breeding area. The plastic sheet is 80 cm higher than the rice field, and 20 cm of it is inserted into the mud. The 20 cm range of the high rice field is covered with 0.8-1.4 cm seedling holes. Plant bitter grass and water peanuts in the ditch, and the rice field outside the ditch is cultivated as usual, and anti-escape facilities are also established at the water inlet and drainage of the rice field to prevent external invasion and shrimp larvae from escaping. Proportionally excavate several furrows in the paddy field whose length is not less than 80% of the length or width of the paddy field, 10-15 cm wide, and 10-25 cm deep, and apply 500-800 kg of organic fertilizer per mu as the base fertilizer. Parent shri...

technical field

[0001] The invention relates to the technical field of shrimp cultivation, and more specifically relates to a method for freshwater cultivation of crayfish. Background technique

[0002] Crayfish originated in North America and are commonly known as freshwater crayfish. In terms of classification, they belong to the crustacea Arthropoda. It was introduced into China after 1929 and has spread all over the country. With the continuous improvement of people's living standards, the market consumption and export volume are increasing rapidly, but the natural wild resources are far from meeting the demand. Therefore, it is the only choice to meet the increasing demands of processing export and market consumption through artificial scientific freshwater aquaculture. At present, there are three main methods of crayfish farming: 1. The form of feeding shrimp, 2. The form of feeding shrimp, and 3. The form of raising shrimp. The first form of stocking is to stock se...

Examples

Embodiment 1

[0012] The culture method of crayfish is: 1, excavate an area to account for 2-12% of the total area of ​​the paddy field at the water inlet of the paddy field, deep 0.6-0.8 meter, wide not less than the enclosure ditch of 2.8 meters. 2. The mesh around the ditch is 0.7-1.07 cm to form a breeding area. Anti-escape facilities must be established at the water inlet and outlet of the paddy field to prevent external invasion and self-escape of shrimp seedlings. 3. Apply sufficient base fertilizer, preferably 500-800 kg of organic fertilizer per mu. Broodstock shrimp can be stocked before and after transplanting seedlings. Before stocking, the ditch must be disinfected, and quicklime can be used for disinfection. After a week, Elodea For aquatic plants such as bitter grass or water peanuts, the coverage rate should not be lower than 50% of the water surface. When stocking the broodstock shrimps, they should also be disinfected. They can be soaked in a solution of 1 / 10,000 potassiu...

Embodiment 2

[0014] The method of cultivating crayfish in rice fields is: use the original ring ditch in the paddy field, but the ring ditch must be no shallower than 0.6-0.8 meters and the width is no less than 2.5 meters. A breeding area is surrounded by asbestos tiles at the water inlet. Accounting for 2-12% of the total paddy field area, the bottom end of the asbestos tile is inserted into the mud to ensure the firmness and applicability of the enclosure. The paddy fields outside the ditch are normally plowed and planted according to the rice cultivation requirements. For the needs of breeding, anti-escape facilities are also established at the water inlet and outlet of the paddy field to prevent predators and shrimp seedlings from escaping. Broodstock shrimp can be stocked before and after transplanting seedlings. Before stocking, the ditch is advanced with water, the depth is not less than 25 cm, and the water is disinfected with quicklime. A week later, aquatic plants are also plant...

Embodiment 3

[0016] The rice field culture method of crayfish is: excavate at the water inlet end of the rice field to form an enclosure ditch with an area of ​​4-12% of the paddy field area, a depth of 0.6-0.8 meters, and a width of not less than 5 meters. The plastic sheet forms a breeding area. The plastic sheet is 80 cm higher than the rice field, and 20 cm of it is inserted into the mud. The 20 cm range of the high rice field is covered with 0.8-1.4 cm seedling holes. Plant bitter grass and water peanuts in the ditch, and the rice field outside the ditch is cultivated as usual, and anti-escape facilities are also established at the water inlet and drainage of the rice field to prevent external invasion and shrimp larvae from escaping. Proportionally excavate several furrows in the paddy field whose length is not less than 80% of the length or width of the paddy field, 10-15 cm wide, and 10-25 cm deep, and apply 500-800 kg of organic fertilizer per mu as the base fertilizer. Parent shri...