In recent years, Yandu District, Yancheng City, Jiangsu Province has innovated the new mode of healthy breeding of white shrimps in the implementation of the Fisheries Science and Technology Demonstration Project, and achieved good economic and social benefits. The output of this model is stable at about 350kg, and the net profit is up to 5,000 yuan. No chemical drugs are used in the breeding process. The produced shrimp has passed the inspection to achieve the “pollution-free aquatic product†standard. Now its experience is described as follows:
I. Pond conditions and preparation
1, shrimp pond construction. The use of low-lying farmland to build a "high foot pond" shrimp ponds, the open area, generally more than 10 acres, 50 acres or less is appropriate. The excavated earthwork is used to raise and reinforce concrete pools around the excavation area with a width of 5m, a width of 1m and a depth of 1.2m. During the cultivation period, water is pumped into the pool from the river. The maximum water level in the shrimp pond can reach 1.6m. Sufficient water, water quality in line with NY5051-2001 standards.
2, supporting facilities. The shrimp pond is equipped with 1 to 2 electric submersible pumps, 1 cement boat, and 1 aerator per 5 mu of water. In the ring ditch, a temporary culvert is built to build a large shed, a small pool is opened in the pool, and a plastic film is laid to serve as a holding pool for the rotation of the shrimp seedlings.
3, Qingchi disinfection. After the shrimp is harvested, the pool water is drained to remove the silt in the surface layer and allow it to be frozen in the sun. In early April of the following year, the whole pool is uniformly sprinkled with quicklime of 100kg/mu. After the next day, 50kg of tea seed cake soaked in the whole area is poured. After 2 to 3 days, disinfectant water is discharged, and the sun bath is used for 3 to 5 days.
4, prepare seedlings. For the first time before putting seedlings for 3 to 5 days, the greenhouse holding tank is filled with 60cm of water, 2kg of crude salt per m3 of water is added, trace elements are added at the same time, and then the “high-efficiency live bacteria fertilizer water king†is added with “Yizhuibao†fertilizer water. ) To cultivate zooplankton such as rotifers as puffs for young prawns.
Second, seed stocking
l, buy shrimp. Choose a healthy quarantine shrimp seedlings, the length of the body is O. 8 ~ 1.2cm. Visual observation: body surface clean, no attachments; long figure appearance, back bow when swimming; head black and white, thick and obvious intestinal; responsive; nursery pool water is golden yellow, no floating seedlings, pH value of 7. Between 8 and 8.4; the difference between the water temperature and the pond water temperature is less than 3°C.
2, batches of stocked shrimp. The seedlings were planted four times in mid-April, mid-May, early June and mid-June. Each time, 25,000 seedlings were released per acre. The first group of shrimps were raised in the greenhouse for 20 days, and then the greenhouses were dismantled and slowly added to the ponds for feeding. The second to fourth groups of shrimps were raised in the holding pond of Datang for 12 to 15 days, and the temporary raising seedlings were introduced into Datang in batches by means of flushing. After the last batch of seedlings was raised, the stocking pond was removed.
3, put fish, crabs. In the end of May, about 15 grams of squid were weighed around 100g per acre, and 40g of bigeye larvae were stocked in each acre.
Third, daily feeding and management
1. Holding management. Feeding: Adhere to a small number of times in order to reduce the waste of bait sinking and polluting pool water. Feed every 4 to 6 times. After the juveniles are stocked, they are fed with 3 to 5 days of shrimp slices, then they are fed with 0#, 01#, and 02# materials. At the same time, attention should be paid to the acclimatization of rejuvenation. Pipe water: According to the water temperature and water quality of the pool water, change the water 1/5 or so per day, and keep the pool water with a certain amount of fat, and at the same time, turn on the oxygen regularly. Prevent disease: regularly add allicin and vc and other drugs in the feed to improve the disease resistance of shrimp seedlings.
2, adjust the water quality. The first 10 days with a biological agent water transfer, sharing 3 to 4 times, then use once every 3 ~ 5d, the principle is less, more than times. One species accounted for 50% of the total, 2 to 3 species were mixed and used; after breeding for 40 to 50 days, depending on the status of the shrimp pond bottom, the bottom reform, pond detoxification treasure, etc. were used, usually 10 days.
3, feed feeding. The quality feed produced by regular manufacturers was used, and the feed amount accounted for 2.5% to 4% of the body weight of shrimps. It was necessary to control the food on rainy days and reduce the amount of feeding by 30% when shrimps were heavily shelled. Feed 4 times a day, divided into 5:00 to 6:00, 11:00 to 12:00, 16:00 to 17:00, and 2l:00 to 22:00. To set the bait station, observe it.
4, use aerator. From 30 to 40 days after release of seedlings, sunny days start every afternoon for 2 to 3 hours, after 50 days, increase the boot time, encountered special circumstances such as floating shrimp head, bad weather, etc. at any time.
Fourth, shrimp fishing sales
From late June, except for inclement weather and abnormal shrimp and shrimp, the company insists on selling shrimps for sale on a daily basis. The catch will be determined according to the market, and generally it will capture 30-80 kg per day. In the early days, 140 shrimps/kg of shrimp were caught on the ground cage made with 9# net. From August, the net cage made of 10# net was used to catch 80 shrimp/kg or so. Swim yourself out of the cage. From the "Chong Yang" Festival, every night, the river crabs on the shore are captured by hand and listed. By the beginning of November, all the fish, crabs and crabs at Tang Pond will be captured.
V. Benefit Analysis
A model household has 12 acres of shrimp ponds, and the benefits in 2008 are as follows:
1, output. A total of 4600kg of shrimp was harvested, 383kg of Muping, and the sales revenue was 128,800 yuan (32 shrimp/kg in June, 28 yuan/kg in July, and 24~26 yuan/kg in August); Crab 215kg, sales income 0.35 million yuan; squid sales income 0.43 million yuan, total output 136,500 yuan, Muping 11,375 yuan.
2, input. Seed 9420 yuan, pond rent 2400 yuan, 39100 yuan for feed, electricity 4,000 yuan, 3,000 yuan for drugs, wages 15,000 yuan, depreciation and other 2200 yuan, a total investment of 7.512 million yuan, 6260 yuan per mu.
3, benefits. The net income was 61,380,000 yuan and the Muping was 5,115 yuan. Input-output ratio 1:1.82.
6. Summary and discussion
1, summary. This mode changes the traditional one-time release of seedlings to release the seedlings several times, avoiding the high biological load in the ponds and easily causing adverse effects such as lack of oxygen and diseases. Through round catching, the shrimp ponds always maintain a reasonable density. Biological agents are used to regulate the water quality during the cultivation. The shrimps do not cause diseases and chemical drugs are not needed, which ensures the quality and safety of commercial shrimps. Adopting uninterrupted shrimp catching avoids concentrating on the 8-10 peak period listing. The price is high, the profit margin is large, and the capital turnover can be accelerated.
2, shrimp pool nest raising crabs. Putting a small amount of big-eyed larvae in the shrimp pond has two main functions. First, it can eat a small amount of dead shrimp at the bottom to prevent the spread of shrimp diseases; Second, it can be used as a “barometer†for the quality of shrimp ponds, and the water quality of shrimp ponds changes. At that time, the crabs first landed and crawled, and at this time, water quality should be regulated immediately.
3, shrimp cultivation. In this model, shrimps are stocked in 4 batches. Each time the shrimps are introduced into Datang, they must be raised for more than 12 days. Otherwise, shrimps will eat shrimp. The temperature during the holding period of the early seedlings is low, and the water temperature should be controlled during the holding period to prevent the shrimps from being stressed when the temperature difference is too large. It is recommended to build another water storage shed for water quality training and warm-up, which will have better results. During the post-seedling period, the weather is hotter during the holding period. Cooling measures such as adding water and changing water are adopted.
4, to prevent the moss. Water quality is too thin and easy to grow moss, shrimp growth is extremely unfavorable, so the shrimp ponds always maintain a certain degree of fat, conditional per acre shrimp ponds can be stocked with 3 to 5 head head carp species, can control the growth of moss.
I. Pond conditions and preparation
1, shrimp pond construction. The use of low-lying farmland to build a "high foot pond" shrimp ponds, the open area, generally more than 10 acres, 50 acres or less is appropriate. The excavated earthwork is used to raise and reinforce concrete pools around the excavation area with a width of 5m, a width of 1m and a depth of 1.2m. During the cultivation period, water is pumped into the pool from the river. The maximum water level in the shrimp pond can reach 1.6m. Sufficient water, water quality in line with NY5051-2001 standards.
2, supporting facilities. The shrimp pond is equipped with 1 to 2 electric submersible pumps, 1 cement boat, and 1 aerator per 5 mu of water. In the ring ditch, a temporary culvert is built to build a large shed, a small pool is opened in the pool, and a plastic film is laid to serve as a holding pool for the rotation of the shrimp seedlings.
3, Qingchi disinfection. After the shrimp is harvested, the pool water is drained to remove the silt in the surface layer and allow it to be frozen in the sun. In early April of the following year, the whole pool is uniformly sprinkled with quicklime of 100kg/mu. After the next day, 50kg of tea seed cake soaked in the whole area is poured. After 2 to 3 days, disinfectant water is discharged, and the sun bath is used for 3 to 5 days.
4, prepare seedlings. For the first time before putting seedlings for 3 to 5 days, the greenhouse holding tank is filled with 60cm of water, 2kg of crude salt per m3 of water is added, trace elements are added at the same time, and then the “high-efficiency live bacteria fertilizer water king†is added with “Yizhuibao†fertilizer water. ) To cultivate zooplankton such as rotifers as puffs for young prawns.
Second, seed stocking
l, buy shrimp. Choose a healthy quarantine shrimp seedlings, the length of the body is O. 8 ~ 1.2cm. Visual observation: body surface clean, no attachments; long figure appearance, back bow when swimming; head black and white, thick and obvious intestinal; responsive; nursery pool water is golden yellow, no floating seedlings, pH value of 7. Between 8 and 8.4; the difference between the water temperature and the pond water temperature is less than 3°C.
2, batches of stocked shrimp. The seedlings were planted four times in mid-April, mid-May, early June and mid-June. Each time, 25,000 seedlings were released per acre. The first group of shrimps were raised in the greenhouse for 20 days, and then the greenhouses were dismantled and slowly added to the ponds for feeding. The second to fourth groups of shrimps were raised in the holding pond of Datang for 12 to 15 days, and the temporary raising seedlings were introduced into Datang in batches by means of flushing. After the last batch of seedlings was raised, the stocking pond was removed.
3, put fish, crabs. In the end of May, about 15 grams of squid were weighed around 100g per acre, and 40g of bigeye larvae were stocked in each acre.
Third, daily feeding and management
1. Holding management. Feeding: Adhere to a small number of times in order to reduce the waste of bait sinking and polluting pool water. Feed every 4 to 6 times. After the juveniles are stocked, they are fed with 3 to 5 days of shrimp slices, then they are fed with 0#, 01#, and 02# materials. At the same time, attention should be paid to the acclimatization of rejuvenation. Pipe water: According to the water temperature and water quality of the pool water, change the water 1/5 or so per day, and keep the pool water with a certain amount of fat, and at the same time, turn on the oxygen regularly. Prevent disease: regularly add allicin and vc and other drugs in the feed to improve the disease resistance of shrimp seedlings.
2, adjust the water quality. The first 10 days with a biological agent water transfer, sharing 3 to 4 times, then use once every 3 ~ 5d, the principle is less, more than times. One species accounted for 50% of the total, 2 to 3 species were mixed and used; after breeding for 40 to 50 days, depending on the status of the shrimp pond bottom, the bottom reform, pond detoxification treasure, etc. were used, usually 10 days.
3, feed feeding. The quality feed produced by regular manufacturers was used, and the feed amount accounted for 2.5% to 4% of the body weight of shrimps. It was necessary to control the food on rainy days and reduce the amount of feeding by 30% when shrimps were heavily shelled. Feed 4 times a day, divided into 5:00 to 6:00, 11:00 to 12:00, 16:00 to 17:00, and 2l:00 to 22:00. To set the bait station, observe it.
4, use aerator. From 30 to 40 days after release of seedlings, sunny days start every afternoon for 2 to 3 hours, after 50 days, increase the boot time, encountered special circumstances such as floating shrimp head, bad weather, etc. at any time.
Fourth, shrimp fishing sales
From late June, except for inclement weather and abnormal shrimp and shrimp, the company insists on selling shrimps for sale on a daily basis. The catch will be determined according to the market, and generally it will capture 30-80 kg per day. In the early days, 140 shrimps/kg of shrimp were caught on the ground cage made with 9# net. From August, the net cage made of 10# net was used to catch 80 shrimp/kg or so. Swim yourself out of the cage. From the "Chong Yang" Festival, every night, the river crabs on the shore are captured by hand and listed. By the beginning of November, all the fish, crabs and crabs at Tang Pond will be captured.
V. Benefit Analysis
A model household has 12 acres of shrimp ponds, and the benefits in 2008 are as follows:
1, output. A total of 4600kg of shrimp was harvested, 383kg of Muping, and the sales revenue was 128,800 yuan (32 shrimp/kg in June, 28 yuan/kg in July, and 24~26 yuan/kg in August); Crab 215kg, sales income 0.35 million yuan; squid sales income 0.43 million yuan, total output 136,500 yuan, Muping 11,375 yuan.
2, input. Seed 9420 yuan, pond rent 2400 yuan, 39100 yuan for feed, electricity 4,000 yuan, 3,000 yuan for drugs, wages 15,000 yuan, depreciation and other 2200 yuan, a total investment of 7.512 million yuan, 6260 yuan per mu.
3, benefits. The net income was 61,380,000 yuan and the Muping was 5,115 yuan. Input-output ratio 1:1.82.
6. Summary and discussion
1, summary. This mode changes the traditional one-time release of seedlings to release the seedlings several times, avoiding the high biological load in the ponds and easily causing adverse effects such as lack of oxygen and diseases. Through round catching, the shrimp ponds always maintain a reasonable density. Biological agents are used to regulate the water quality during the cultivation. The shrimps do not cause diseases and chemical drugs are not needed, which ensures the quality and safety of commercial shrimps. Adopting uninterrupted shrimp catching avoids concentrating on the 8-10 peak period listing. The price is high, the profit margin is large, and the capital turnover can be accelerated.
2, shrimp pool nest raising crabs. Putting a small amount of big-eyed larvae in the shrimp pond has two main functions. First, it can eat a small amount of dead shrimp at the bottom to prevent the spread of shrimp diseases; Second, it can be used as a “barometer†for the quality of shrimp ponds, and the water quality of shrimp ponds changes. At that time, the crabs first landed and crawled, and at this time, water quality should be regulated immediately.
3, shrimp cultivation. In this model, shrimps are stocked in 4 batches. Each time the shrimps are introduced into Datang, they must be raised for more than 12 days. Otherwise, shrimps will eat shrimp. The temperature during the holding period of the early seedlings is low, and the water temperature should be controlled during the holding period to prevent the shrimps from being stressed when the temperature difference is too large. It is recommended to build another water storage shed for water quality training and warm-up, which will have better results. During the post-seedling period, the weather is hotter during the holding period. Cooling measures such as adding water and changing water are adopted.
4, to prevent the moss. Water quality is too thin and easy to grow moss, shrimp growth is extremely unfavorable, so the shrimp ponds always maintain a certain degree of fat, conditional per acre shrimp ponds can be stocked with 3 to 5 head head carp species, can control the growth of moss.
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