In 2004, the main cultivated area of ​​Qingzhou shrimp in Chuzhou District of Huai'an City was 6,000 mu, and the mixed raising of 20,000 mu and the average yield of the main raising reached 75 kg/mu. A group of typical high-yield and high-efficiency products emerged. The development of double-season rearing Models in the ponds with a wide variety of fresh shrimps can reduce production costs, increase the size of fresh shrimps, and increase the income of fish farmers. Therefore, this farming model has been widely used in our district and has achieved very good results. Significant, the relevant technologies are summarized below.
First, pond preparation
1. The pond selection area is generally 3 to 5 mu, and the depth of water is 1 to 1.2 meters. It is convenient for water intake and drainage, and has sufficient water resources and no pollution.
2. Pond disinfection According to the requirements of spring and autumn oysters (December to April and May to November), the ponds should be treated with 200-250 kg/mu of lime before the end of December and before mid-May of the following year respectively. Full disinfection, such as the depth of the bottom of the pool can also increase the amount of appropriate. Disinfect the pool to maintain a water level of 10 to 15 cm to improve the clear pond effect.
3. After planting clear ponds, 7-8 days, plants such as Elodea and Hydrilla verticillata are planted. The planting area generally accounts for 1/4 of the pond area, and the planting location is about 1 meter from the pond's shallow water slope. The water temperature is lower when the first prawn is cultured, and the plants can be postponed until February of the following year.
4. Fertilizer Water Quality The first shrimp manure water is generally taken after the clear pond, and usually 200 kg of organic fertilizer is applied per acre to fertilize the water quality, which is beneficial to the damage of moss and other algae during the overwintering period of the shrimp; The method of fertilizing the shrimp is to breed the shrimp in the cage set in the shrimp culture pond after the grass is cultivated in the clear pond. After the larvae have hatched and grow to a film length of about 1 cm, fertilize the shrimp in appropriate amount (or advance to The larvae will be fertilized during the larval rearing period, and the fertilization amount will be half of the spring rate).
5. Set two large and small cages per acre of water for the cages. The small cages are placed in large cages. The large cages are made of 30 mesh nylon mesh, and the area is about 10 square meters. 9 ~ 10 mesh made of polyethylene mesh, generally about 2 square meters, the box sinks 40 cm into the water. A small amount of water peanuts (about 15% of the area of ​​the box) was placed in a small cage to be used as a cover for broodstock to reduce cannibalism.
Second, seed delivery
1. The first squid stocking stocking first squid larvae in December, the shrimp larvae that were selected could not reach the market-standard larvae at the end of last year. (The remaining saplings in the original pool are better, which will improve the survival rate. Rate), specifications about 3 cm, acre stocking capacity of 5 to 10 kg.
2. Second oyster shrimp seed breeding and stocking The second oyster shrimp is marketed in the fall, the breeding cycle is longer, so the required seedlings can be solved through self-breeding and self-cultivation. The method for cultivating shrimps is to put 1 kg of egg-holding shrimp with a size of 5 cm or more from a lake or inland river in a small cage in late May, and feed about 150 grams of bean cake, fish gills, and egg shrimp every day. 10 to 15 days after hatching larvae can hatch. After the hatching of shrimps, small cages can be taken and postpartum broodstock can be sold, leaving only hatched young larvae to be intensively cultivated in large cages. The newly hatched larvae have poor feeding capacity and need to splash 0.5 to 1 kilograms of soya milk into the large cage every day. They can feed the fish larvae at the late stage of nursery, and they can grow into 1-1.5 cm larvae after 20-30 days of cultivation. In this case, the shrimp can be directly put into the pond from the large cage and transferred to normal production management. The shrimps cultivated by this method are of uniform specifications, robust physique and high survival rate, and can also increase the utilization rate of ponds.
Third, aquaculture management
1. The bait feed is generally fed once or twice a day. The first prawn firstly listed in spring begins to feed at the end of March. In April, it feeds once a day only in the evening. After May, it is fed twice a day and once in the evening. Around the point, the feeding amount accounts for 70% of the total feeding amount of the whole day, and the other time before 5 o'clock in the morning, the feeding amount accounts for 30% of the total feeding amount of the whole day. In the fall, the second prawn, which is listed in the fall, can be stopped feeding during the lower water temperature in the first half of November. The rest of the day's bait feed is controlled at 8% to 10% of the pond's total prawn amount. Feeding should adhere to the principles of "four orders" and "four visits." The bait is mainly based on bean cake, wheat bran, snail meat and miscellaneous fish. If the use of full-price feed for the shrimp is more effective.
2. Water quality control Change water once every month in April, change water once in about 5 to 6 months, change water in 2 to 3 days in high temperature season, change water 15 to 20 centimeters each time, in case of rainy or hot days Should increase the amount of water. At the same time, every 3-5 mu of water is equipped with a 0.75-kilowatt waterwheel type aerator to keep the flow of the pool water and sufficient dissolved oxygen.
The release of plankton in the ponds of flowering whitefish is beneficial to the ecological balance of the waters and the improvement of the breeding efficiency. Generally, the stocking size per acre of 16 to 20 tails/kilograms of 100 flowers and white tails is 100; Such biological agents play an important role in reducing the content of harmful components such as ammonia nitrogen and nitrous acid in pool water.
3. Disease control First shrimp breeding period In winter and spring, shrimp disease is less. During the summer and autumn, the incidence of the second shrimp was higher than that of the first. The common shrimp disease is ciliate disease, black lice and carapace ulcers. The prevention method is: every 15 days in July, August and September, splash the limestone emulsion in the whole pond once, and each time the dosage of water depth is 10 to 15 kg/mu. Every 20 days with bacteria or a chlorhydric acid Chrysanthemum Quanchiposa, each dosage of 0.2 grams / cubic meter. From a few years of practice, as long as we adhere to the above points, the disease of shrimp ponds can be effectively controlled.
4. Reasonable catching of green shrimp The main method of capture is the combination of cage trapping and dry pond catching. The catch rate for cage trapping is about 80%, and the rest is caught in dry ponds. However, it is appropriate to adopt round-fishing for the cultivation of green prawn and pay attention to catching large and small broilers to increase production and aquaculture efficiency. If one-off phasing at the end of the year is followed by centralized listing, not only the output is low, but also the economic efficiency is poor.
Author: Jiangsu Province Huai'an Chuzhou District Aquatic Technology Promotion Station
First, pond preparation
1. The pond selection area is generally 3 to 5 mu, and the depth of water is 1 to 1.2 meters. It is convenient for water intake and drainage, and has sufficient water resources and no pollution.
2. Pond disinfection According to the requirements of spring and autumn oysters (December to April and May to November), the ponds should be treated with 200-250 kg/mu of lime before the end of December and before mid-May of the following year respectively. Full disinfection, such as the depth of the bottom of the pool can also increase the amount of appropriate. Disinfect the pool to maintain a water level of 10 to 15 cm to improve the clear pond effect.
3. After planting clear ponds, 7-8 days, plants such as Elodea and Hydrilla verticillata are planted. The planting area generally accounts for 1/4 of the pond area, and the planting location is about 1 meter from the pond's shallow water slope. The water temperature is lower when the first prawn is cultured, and the plants can be postponed until February of the following year.
4. Fertilizer Water Quality The first shrimp manure water is generally taken after the clear pond, and usually 200 kg of organic fertilizer is applied per acre to fertilize the water quality, which is beneficial to the damage of moss and other algae during the overwintering period of the shrimp; The method of fertilizing the shrimp is to breed the shrimp in the cage set in the shrimp culture pond after the grass is cultivated in the clear pond. After the larvae have hatched and grow to a film length of about 1 cm, fertilize the shrimp in appropriate amount (or advance to The larvae will be fertilized during the larval rearing period, and the fertilization amount will be half of the spring rate).
5. Set two large and small cages per acre of water for the cages. The small cages are placed in large cages. The large cages are made of 30 mesh nylon mesh, and the area is about 10 square meters. 9 ~ 10 mesh made of polyethylene mesh, generally about 2 square meters, the box sinks 40 cm into the water. A small amount of water peanuts (about 15% of the area of ​​the box) was placed in a small cage to be used as a cover for broodstock to reduce cannibalism.
Second, seed delivery
1. The first squid stocking stocking first squid larvae in December, the shrimp larvae that were selected could not reach the market-standard larvae at the end of last year. (The remaining saplings in the original pool are better, which will improve the survival rate. Rate), specifications about 3 cm, acre stocking capacity of 5 to 10 kg.
2. Second oyster shrimp seed breeding and stocking The second oyster shrimp is marketed in the fall, the breeding cycle is longer, so the required seedlings can be solved through self-breeding and self-cultivation. The method for cultivating shrimps is to put 1 kg of egg-holding shrimp with a size of 5 cm or more from a lake or inland river in a small cage in late May, and feed about 150 grams of bean cake, fish gills, and egg shrimp every day. 10 to 15 days after hatching larvae can hatch. After the hatching of shrimps, small cages can be taken and postpartum broodstock can be sold, leaving only hatched young larvae to be intensively cultivated in large cages. The newly hatched larvae have poor feeding capacity and need to splash 0.5 to 1 kilograms of soya milk into the large cage every day. They can feed the fish larvae at the late stage of nursery, and they can grow into 1-1.5 cm larvae after 20-30 days of cultivation. In this case, the shrimp can be directly put into the pond from the large cage and transferred to normal production management. The shrimps cultivated by this method are of uniform specifications, robust physique and high survival rate, and can also increase the utilization rate of ponds.
Third, aquaculture management
1. The bait feed is generally fed once or twice a day. The first prawn firstly listed in spring begins to feed at the end of March. In April, it feeds once a day only in the evening. After May, it is fed twice a day and once in the evening. Around the point, the feeding amount accounts for 70% of the total feeding amount of the whole day, and the other time before 5 o'clock in the morning, the feeding amount accounts for 30% of the total feeding amount of the whole day. In the fall, the second prawn, which is listed in the fall, can be stopped feeding during the lower water temperature in the first half of November. The rest of the day's bait feed is controlled at 8% to 10% of the pond's total prawn amount. Feeding should adhere to the principles of "four orders" and "four visits." The bait is mainly based on bean cake, wheat bran, snail meat and miscellaneous fish. If the use of full-price feed for the shrimp is more effective.
2. Water quality control Change water once every month in April, change water once in about 5 to 6 months, change water in 2 to 3 days in high temperature season, change water 15 to 20 centimeters each time, in case of rainy or hot days Should increase the amount of water. At the same time, every 3-5 mu of water is equipped with a 0.75-kilowatt waterwheel type aerator to keep the flow of the pool water and sufficient dissolved oxygen.
The release of plankton in the ponds of flowering whitefish is beneficial to the ecological balance of the waters and the improvement of the breeding efficiency. Generally, the stocking size per acre of 16 to 20 tails/kilograms of 100 flowers and white tails is 100; Such biological agents play an important role in reducing the content of harmful components such as ammonia nitrogen and nitrous acid in pool water.
3. Disease control First shrimp breeding period In winter and spring, shrimp disease is less. During the summer and autumn, the incidence of the second shrimp was higher than that of the first. The common shrimp disease is ciliate disease, black lice and carapace ulcers. The prevention method is: every 15 days in July, August and September, splash the limestone emulsion in the whole pond once, and each time the dosage of water depth is 10 to 15 kg/mu. Every 20 days with bacteria or a chlorhydric acid Chrysanthemum Quanchiposa, each dosage of 0.2 grams / cubic meter. From a few years of practice, as long as we adhere to the above points, the disease of shrimp ponds can be effectively controlled.
4. Reasonable catching of green shrimp The main method of capture is the combination of cage trapping and dry pond catching. The catch rate for cage trapping is about 80%, and the rest is caught in dry ponds. However, it is appropriate to adopt round-fishing for the cultivation of green prawn and pay attention to catching large and small broilers to increase production and aquaculture efficiency. If one-off phasing at the end of the year is followed by centralized listing, not only the output is low, but also the economic efficiency is poor.
Author: Jiangsu Province Huai'an Chuzhou District Aquatic Technology Promotion Station
Our Rubber & Plastic Products is good in quality and competitive in price. We are manufacturer and supplier Rubber & Plastic Products following your specific requirement. We are looking forward to your E-mail and establishing cooperative relationship with you! We would provide professional Rubber & Plastic with good services for you!
Breast Reliever, Hot Water Bag with Cover, Ear Syringe Ball, Hot Water Bags
Ningbo Cland Medical Instruments Co., Ltd. , http://www.cland-med.com