The new amount of shrimp is commonly known as “base shrimpâ€. Its shell body is thin and the meat is delicious and refreshing, which is better than Chinese shrimp. The domestic and foreign markets are very popular. It is a wide temperature, salty shrimp. The temperature range is 10°C-35°C. The autumn water temperature can be reduced to 6°C-7°C. The best growth temperature is 17°C-32°C. It can adapt to the salinity range 0°C to 35°C. It is more tolerant to hypoxia than prawns. , can be in PH7. O-9.0 normal life in water. Its feeding habit is omnivorous animal feeding. The larvae have the same feeding habits as prawn. During the prawn feeding period, they mainly eat copepods and polychaetes. They also feed on artificial diets and other organic detritus and benthic organisms. The habits lurk in the bottom silt and water grass. According to the new prawns test conducted by the North China Fisheries Development Corporation of Yingkou City, Liaoning Province in 2000, the yield per mu can reach 50-70kg; the rice yield is 550kg, and the economic benefit is about 2,500 yuan. The new amount of shrimp will now be described as follows:
I. Rice field selection
The paddy field requires close proximity to the upper and lower channels, sufficient water supply, good water quality, smooth drainage and irrigation, and convenient transportation. Specific requirements are as follows.
1. Conditions: The shrimp-raising rice fields are basically similar to the crab-reared area, with 2-5 acres being the best, and the largest being less than 10 acres.
2. Field Project: Digging of “mouth†and “king†type gutters around the paddy field where the shrimp is established, with a ditch depth of 0.8-1 m and a width of 1-1.5 m, and raising shrimp ditch to account for 15% of the paddy field area. Borrow from the trenches to widen and raise the surrounding embankments, and the double-layer anti-escape nets are installed at the entrance and exit of rice fields.
Second, prepare before transplanting
1. Qing Tian: For the cultivated fields, 50-75 kg of lime per acre was used to kill the wild fish and bacteria in Tanaka.
2. Cultivate basic bait: After 7-8 days in Qingtian, the paddy field water level is stable at 5-10cm. Choose 200-300kg organic fertilizer in the sunny morning; urea 3kg, superphosphate 5kg, Quanchiposa to cultivate the biological food in the field.
3. Rice planting: Liaoyan, a high-yielding, high-quality, lodging-resistant and disease-resistant rice variety.
On May 20th, the transplanting and transplanting method was the same as that of ordinary paddy fields, and the number of holes per acre was not less than 15,000. On May 30, the seedlings had returned to green. From June 1 to June 5, shrimp seedlings were started.
Third, seed delivery
1. Shrimp desalination: At present, most of artificially-cultured shrimps are produced in factories, and the proportion of seawater in hatchery seedlings is generally 1.015-1.020. To be transferred to freshwater, first of all, the aquaculture should be diluted, and the cultured shrimp should be diluted to 1.002-1. . The following O03 can be transplanted into paddy fields for breeding.
2, seed quality: shrimp body length 0.7-0.8cm, physical fitness, body surface brown and clean and tidy. When the seedlings are fed, the water temperature in the pool is similar to the outside temperature, and the temperature difference does not exceed 2°C to 3°C.
3. Shrimp stocking rate and stocking time: 30,400 to 40,000 seedlings per mu of paddy field, with no more than 50,000 tails.
Time for release: The stocking time in the northern region is generally at the beginning of June each year.
Fourth, feeding and management
1. Feeding: After one month of the shrimp pond, the main intake of plankton in the paddy field is one month later, it grows to 2-3cm, and is fed with fine artificial diet pellets (prawn feed), and the daily feeding amount is 5 % to 6%; if the water temperature reaches 24°C to 30°C, the shrimp around the base will inevitably feed and the daily feed will increase to 8% to 10%. 3-4 times a day, once in the evening, more than 40% of the whole day's bait feed, and where conditions permit, plankton and wild fish are harvested from external waste pits or paddy fields as auxiliary feed. It is advisable to eat shrimp for 2-3 hours each time.
2. Water level control and water quality management: The early feeding water level of shrimps is kept at about 5cm, and the water level of rice seedlings gradually deepens. The medium water level must not be less than 10cm. The water quality is fresh and the fatness is moderate. The transparency of shrimp farming is 35-40 cm, and the water color is light green. Lime once every 20-25 days, 7.5-10kg per mu.
Fresh water quality and relatively stable physical and chemical factors are important guarantees for the growth of shrimp moltings. Compared to fish, shrimps require higher water quality than fish, and they are more sensitive to water pollution. It is known that when the water-soluble oxygen per litre is in the range of 8-9 mg, the growth of the shrimp around the base can be promoted, and when it is lower than 3-4 mg, it is not conducive to growth. The pH value of the shrimp around the base is between 7 and 9. When it is less than 7 or less, it is not conducive to molting. Change the water every 2-3 days in the hot season. The amount of water to be changed is 1/2 of the paddy field, especially in the rainy season, the amount of exchanged water should reach 1/3 or more, and the lack of oxygen should be strictly prevented.
3. Disease prevention and control: adhere to the principle of prevention, prevention and treatment. During the whole breeding period, the lime was regularly splashed 5 times, each time in an amount of 10-15ppm, to kill bacteria and drive off the enemy. At the same time, the timely addition of calcium is beneficial to the growth of shrimp molting.
4. Do a good job in recording: Establish records and management systems from seedlings to fishing. Daily records of temperature, water temperature, water change and water injection, shrimp growth rate, and feeding conditions were found and problems were solved in time.
Fifth, arrest
The time of collection of the shrimp around the base: It mainly depends on the growth of the shrimp and the market demand. Generally in the paddy field cultivation 90 to 110 days can be grown to 8-10cm commercial shrimp. During the rice ripening season. At this time, the shrimp can be harvested and harvested after the shrimp is harvested. The common collection methods are as follows.
1. Collect cages in cages: In the evening, place cages under the shrimp-grooves in the paddy fields, and harvest cages the next morning. 5-1kg, 25-30 cages per acre field.
2. Pull nets to catch shrimp: Put the paddy field water into the side ditch, and then use a small pull net to pull the net in the paddy field ditch. General continuous pull 3-4 network. The arrest rate reached 40% to 50%, and the network deployment time was in the evening.
3. Dry field water collection shrimp: When the water temperature at 10 °C 15 °C when the shrimp stop feeding and growth, then the rice field through the above two methods of arrest, the remaining number is not much, can be dry trunk ditch water dry law collection.
Sixth, experience
1. Kiwi shrimp is a new breed with very promising development of sea shrimp. Its production period coincides with the rice planting period. At the same time, paddy fields also provide a good living environment for the growth, development and inhabitation of shrimps. Therefore, shrimp farming in rice fields is an efficient model for adjusting the structure of rural industrialization.
2. The girth shrimps are highly technically cultivated in paddy fields. Therefore, the risk of aquaculture is greater, mainly due to seed dilution, which is the key to the success and failure of shrimp farming. Therefore, nursery plants must strictly follow the operating procedures to produce, when purchasing seedlings must be selected for desalination of seed, or can not be purchased, so as not to affect shrimp quality and survival rate.
3. The quality of water quality is one of the important factors affecting the production and recovery rate of adult shrimp. Freshwater quality should be maintained in the gigantic shrimp aquaculture process, so that the water temperature, dissolved oxygen, pH, transparency, etc., of the paddy fields should be good. Freshwater wells should be used wherever possible, and natural waters and groundwater should be used to cultivate shrimp in the middle and late stages of rice paddy management. The water exchange amount is 1/3-1/2. Constantly adding new water, this can promote better growth of shrimp.
4. In the field of shrimp farming, a certain amount of whitefish can be used to adjust the water quality. Put 3—5cm per acre 500-600 tail summer or spring fish, specifications in 200-300 grams put 40-50 tail. But do not eat and eat fish to avoid competition.
5. Shrimp seedlings are raised. Due to the small number of shrimps purchased, the average is about 0.5cm. It is not suitable to invest in large areas of paddy fields and is raised to 2-3 cm in the cultivated fields. Then, as individuals increase the water temperature, they are put into the rice fields, which can improve the survival rate.
6. Strictly regulate the prohibition of barley and wild fish entering the field. After the early stage of the shrimp enters the field, the individuals are small and have poor resistance. If frogs and wild fish will eat juvenile shrimp, the frogs should be promptly removed. The upper and lower water outlets should be firmly clamped with a sieve, and wild fish or fish eggs should not be allowed to enter the field, so as to avoid competition for small fish and shrimp, affecting the increase in yield per unit area.
I. Rice field selection
The paddy field requires close proximity to the upper and lower channels, sufficient water supply, good water quality, smooth drainage and irrigation, and convenient transportation. Specific requirements are as follows.
1. Conditions: The shrimp-raising rice fields are basically similar to the crab-reared area, with 2-5 acres being the best, and the largest being less than 10 acres.
2. Field Project: Digging of “mouth†and “king†type gutters around the paddy field where the shrimp is established, with a ditch depth of 0.8-1 m and a width of 1-1.5 m, and raising shrimp ditch to account for 15% of the paddy field area. Borrow from the trenches to widen and raise the surrounding embankments, and the double-layer anti-escape nets are installed at the entrance and exit of rice fields.
Second, prepare before transplanting
1. Qing Tian: For the cultivated fields, 50-75 kg of lime per acre was used to kill the wild fish and bacteria in Tanaka.
2. Cultivate basic bait: After 7-8 days in Qingtian, the paddy field water level is stable at 5-10cm. Choose 200-300kg organic fertilizer in the sunny morning; urea 3kg, superphosphate 5kg, Quanchiposa to cultivate the biological food in the field.
3. Rice planting: Liaoyan, a high-yielding, high-quality, lodging-resistant and disease-resistant rice variety.
On May 20th, the transplanting and transplanting method was the same as that of ordinary paddy fields, and the number of holes per acre was not less than 15,000. On May 30, the seedlings had returned to green. From June 1 to June 5, shrimp seedlings were started.
Third, seed delivery
1. Shrimp desalination: At present, most of artificially-cultured shrimps are produced in factories, and the proportion of seawater in hatchery seedlings is generally 1.015-1.020. To be transferred to freshwater, first of all, the aquaculture should be diluted, and the cultured shrimp should be diluted to 1.002-1. . The following O03 can be transplanted into paddy fields for breeding.
2, seed quality: shrimp body length 0.7-0.8cm, physical fitness, body surface brown and clean and tidy. When the seedlings are fed, the water temperature in the pool is similar to the outside temperature, and the temperature difference does not exceed 2°C to 3°C.
3. Shrimp stocking rate and stocking time: 30,400 to 40,000 seedlings per mu of paddy field, with no more than 50,000 tails.
Time for release: The stocking time in the northern region is generally at the beginning of June each year.
Fourth, feeding and management
1. Feeding: After one month of the shrimp pond, the main intake of plankton in the paddy field is one month later, it grows to 2-3cm, and is fed with fine artificial diet pellets (prawn feed), and the daily feeding amount is 5 % to 6%; if the water temperature reaches 24°C to 30°C, the shrimp around the base will inevitably feed and the daily feed will increase to 8% to 10%. 3-4 times a day, once in the evening, more than 40% of the whole day's bait feed, and where conditions permit, plankton and wild fish are harvested from external waste pits or paddy fields as auxiliary feed. It is advisable to eat shrimp for 2-3 hours each time.
2. Water level control and water quality management: The early feeding water level of shrimps is kept at about 5cm, and the water level of rice seedlings gradually deepens. The medium water level must not be less than 10cm. The water quality is fresh and the fatness is moderate. The transparency of shrimp farming is 35-40 cm, and the water color is light green. Lime once every 20-25 days, 7.5-10kg per mu.
Fresh water quality and relatively stable physical and chemical factors are important guarantees for the growth of shrimp moltings. Compared to fish, shrimps require higher water quality than fish, and they are more sensitive to water pollution. It is known that when the water-soluble oxygen per litre is in the range of 8-9 mg, the growth of the shrimp around the base can be promoted, and when it is lower than 3-4 mg, it is not conducive to growth. The pH value of the shrimp around the base is between 7 and 9. When it is less than 7 or less, it is not conducive to molting. Change the water every 2-3 days in the hot season. The amount of water to be changed is 1/2 of the paddy field, especially in the rainy season, the amount of exchanged water should reach 1/3 or more, and the lack of oxygen should be strictly prevented.
3. Disease prevention and control: adhere to the principle of prevention, prevention and treatment. During the whole breeding period, the lime was regularly splashed 5 times, each time in an amount of 10-15ppm, to kill bacteria and drive off the enemy. At the same time, the timely addition of calcium is beneficial to the growth of shrimp molting.
4. Do a good job in recording: Establish records and management systems from seedlings to fishing. Daily records of temperature, water temperature, water change and water injection, shrimp growth rate, and feeding conditions were found and problems were solved in time.
Fifth, arrest
The time of collection of the shrimp around the base: It mainly depends on the growth of the shrimp and the market demand. Generally in the paddy field cultivation 90 to 110 days can be grown to 8-10cm commercial shrimp. During the rice ripening season. At this time, the shrimp can be harvested and harvested after the shrimp is harvested. The common collection methods are as follows.
1. Collect cages in cages: In the evening, place cages under the shrimp-grooves in the paddy fields, and harvest cages the next morning. 5-1kg, 25-30 cages per acre field.
2. Pull nets to catch shrimp: Put the paddy field water into the side ditch, and then use a small pull net to pull the net in the paddy field ditch. General continuous pull 3-4 network. The arrest rate reached 40% to 50%, and the network deployment time was in the evening.
3. Dry field water collection shrimp: When the water temperature at 10 °C 15 °C when the shrimp stop feeding and growth, then the rice field through the above two methods of arrest, the remaining number is not much, can be dry trunk ditch water dry law collection.
Sixth, experience
1. Kiwi shrimp is a new breed with very promising development of sea shrimp. Its production period coincides with the rice planting period. At the same time, paddy fields also provide a good living environment for the growth, development and inhabitation of shrimps. Therefore, shrimp farming in rice fields is an efficient model for adjusting the structure of rural industrialization.
2. The girth shrimps are highly technically cultivated in paddy fields. Therefore, the risk of aquaculture is greater, mainly due to seed dilution, which is the key to the success and failure of shrimp farming. Therefore, nursery plants must strictly follow the operating procedures to produce, when purchasing seedlings must be selected for desalination of seed, or can not be purchased, so as not to affect shrimp quality and survival rate.
3. The quality of water quality is one of the important factors affecting the production and recovery rate of adult shrimp. Freshwater quality should be maintained in the gigantic shrimp aquaculture process, so that the water temperature, dissolved oxygen, pH, transparency, etc., of the paddy fields should be good. Freshwater wells should be used wherever possible, and natural waters and groundwater should be used to cultivate shrimp in the middle and late stages of rice paddy management. The water exchange amount is 1/3-1/2. Constantly adding new water, this can promote better growth of shrimp.
4. In the field of shrimp farming, a certain amount of whitefish can be used to adjust the water quality. Put 3—5cm per acre 500-600 tail summer or spring fish, specifications in 200-300 grams put 40-50 tail. But do not eat and eat fish to avoid competition.
5. Shrimp seedlings are raised. Due to the small number of shrimps purchased, the average is about 0.5cm. It is not suitable to invest in large areas of paddy fields and is raised to 2-3 cm in the cultivated fields. Then, as individuals increase the water temperature, they are put into the rice fields, which can improve the survival rate.
6. Strictly regulate the prohibition of barley and wild fish entering the field. After the early stage of the shrimp enters the field, the individuals are small and have poor resistance. If frogs and wild fish will eat juvenile shrimp, the frogs should be promptly removed. The upper and lower water outlets should be firmly clamped with a sieve, and wild fish or fish eggs should not be allowed to enter the field, so as to avoid competition for small fish and shrimp, affecting the increase in yield per unit area.
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