"Autumn plover" refers to the squid hatched in the fall. Since it is not produced in the natural breeding season, fry breeding is different from other domestic fish. The following matters should be noted:
I. Disinfection of fish ponds in due course Due to the high temperature in autumn, early or late disinfection of ponds will affect the survival rate of fry. Prematurely, the enemy suffers more, such as blisters, blisters, pine algae and other natural reproduction very quickly, and eat young fish fry; too late pond water toxins have not disappeared (ie, the water is not awake), after the fish flower pond will be poisoned Dead, so generally in the 4-6 days before the fish flower ponds disinfection is appropriate. When Qingtang is used, tea bran, quicklime or bleaching powder (strong chlorine) may be used in one or a combination of the following ways: 1 It is better to use tea bran in the thin pond or Xintang, and each mus (only 20 centimeters deep in the pond bottom) 20 jins About crushed and then soaked for 1-2 days, even the slag with the whole pool evenly spilled, about half an hour later with a net in the pond to pull it again, so that the whole pool drug properties. This method can kill miscellaneous fish, frog eggs, cockroaches, snails, cockroaches, and can also play a role in fertilizer and water. 2 fertilizer pond or old pond is best to use quicklime. If the pond is capable of draining water, the whole pond will be splashed with 100 pounds of lime per acre after the dry pond, and will be filled with water the next day. If dry ponds are not available, use 200-300 kg of lime per metre of water per acre. After the water is dissolved, the whole pool will be spilled. Put the fish into the pond after 4-5 days. Quicklime can kill bacteria, parasites, miscellaneous fish, aquatic insects, blue mud moss, etc., and has a positive effect on the prevention of bacterial fish disease and water quality regulation. 3 If the time is tight or shallow water with bleach (or strong chlorine) can also have the desired effect. The bleaching powder contains 30% of available chlorine as the standard. After each mu of water is 1 meter, 30 kg of water is dissolved, Quanchip is splashed (for strong chlorine, only 6-8 kg is required). The next day, the fish pond can be drained. 3- After 4 days, the fish flower was used, and the effect was almost the same as quick lime.
Second, the good water off the high temperature season, miscellaneous fish, frogs breed quickly, the previous disinfection of the fish ponds, when the water must be packed with a dense filter cloth inlet, to avoid miscellaneous fish flowers or eggs into the fry cultivation pool. Clean the filter cloth every 1-2 hours to prevent clogging. In front of fish ponds, the water level should be controlled between 80-100 cm. If the water level is too shallow, and the water temperature is high (more than 34°C) during the high temperature season, the fish flower will easily become violent; if it is too deep, the water quality will be difficult to control.
Third, before cultivating the water quality, the water quality needs to be clear, cool, tender, and green bean color. The transparency should be 20 cm. If the pond is crystal clear after poison ponds, it is advisable to vote for gantadine or perishable turfgrass to increase the plankton's purpose and ensure that there are enough natural feeds after the pond falls. If the pond water is too fat, the living water can be properly increased to raise the water level. Fourth, the daily feeding and management of fish after falling pool (generally 3-4 days after the emergence, and then fall into the cultivation pool), the second day began to feed the egg yolk or soy milk, 10,000 fish fry with 2 egg yolks or 300 grams of soybean mash, Feed it every day and twice in the afternoon. The egg yolks should be sprayed with nylon filter cloth in the pan and then sprayed evenly. After 3-4 days of feeding, the mixture was changed to 30% soybean, 15% wheat bran, 15% corn, and 40% peanut bran. After fully mixing, pulverize with a pulverizer. Use 2-3 kg of dry powder for every 10,000 fish fry. After the water is dissolved, it should be sprayed evenly on the pool every two times. In addition, due to the high feed temperature, the fry grows fast and after a week of feeding, the fry may float. If this situation is not handled properly, it will cause all suffocation to die, especially in the hot weather before the storm. Prevention measures are as follows: 1 The rotten grassy residue in the fry pool should be removed in time. 2 In the early morning, you should take a tour of the pond early. If there is any abnormality, flush the water immediately or take other oxygenation measures. V. Disease prevention and control The biggest natural enemies of autumn cod seedlings are blisters and blisters, and countless young fry are eaten daily. This is one of the main reasons for the low survival rate of young cod fish. The following preventive measures can be taken: In addition to the clear pond, the water should be strictly shut off, and the fish and ponds should be treated with trichlorfon and kerosene two days before the ponds are dissolved. Quanchiposa should be used. Each mu of water depth is 1 meter with 0.5 kg of trichlorfon with 0.5 kg. Kerosene, then mixed with 2 pounds of fine sand, the entire pool spilled evenly, up to the purpose of killing the enemy.
After the fry have been cultivated for 8-10 days, they can grow to 5-6, and trichodiasis may occur at this time. Symptoms are: slow movement, white mouth or lid swelling. If measures are not taken in time, the survival rate of the fry will be significantly reduced, even only 10%-20%. Therefore, when it reaches the age of 6-7, when the copper sulfate and ferrous sulphate mixture is used, 0.5:0.2 ppm of water dissolves and the whole pool is splashed once, which can prevent disease. If fish ponds are found to be onset, they should be sprayed with the drug twice a day (once a day), or 3-4 days after the fish flowering pool, and the buckwheat leaves (1 meter deep) can be bundled with 30-40 kilograms. Water, placed in the corners of the pond, can also be used to prevent disease.
The cultivation of the autumn eel fry should grasp the above-mentioned links, and generally, after about 20 days of feeding and management, it can reach the market specifications of 7-8 North.
I. Disinfection of fish ponds in due course Due to the high temperature in autumn, early or late disinfection of ponds will affect the survival rate of fry. Prematurely, the enemy suffers more, such as blisters, blisters, pine algae and other natural reproduction very quickly, and eat young fish fry; too late pond water toxins have not disappeared (ie, the water is not awake), after the fish flower pond will be poisoned Dead, so generally in the 4-6 days before the fish flower ponds disinfection is appropriate. When Qingtang is used, tea bran, quicklime or bleaching powder (strong chlorine) may be used in one or a combination of the following ways: 1 It is better to use tea bran in the thin pond or Xintang, and each mus (only 20 centimeters deep in the pond bottom) 20 jins About crushed and then soaked for 1-2 days, even the slag with the whole pool evenly spilled, about half an hour later with a net in the pond to pull it again, so that the whole pool drug properties. This method can kill miscellaneous fish, frog eggs, cockroaches, snails, cockroaches, and can also play a role in fertilizer and water. 2 fertilizer pond or old pond is best to use quicklime. If the pond is capable of draining water, the whole pond will be splashed with 100 pounds of lime per acre after the dry pond, and will be filled with water the next day. If dry ponds are not available, use 200-300 kg of lime per metre of water per acre. After the water is dissolved, the whole pool will be spilled. Put the fish into the pond after 4-5 days. Quicklime can kill bacteria, parasites, miscellaneous fish, aquatic insects, blue mud moss, etc., and has a positive effect on the prevention of bacterial fish disease and water quality regulation. 3 If the time is tight or shallow water with bleach (or strong chlorine) can also have the desired effect. The bleaching powder contains 30% of available chlorine as the standard. After each mu of water is 1 meter, 30 kg of water is dissolved, Quanchip is splashed (for strong chlorine, only 6-8 kg is required). The next day, the fish pond can be drained. 3- After 4 days, the fish flower was used, and the effect was almost the same as quick lime.
Second, the good water off the high temperature season, miscellaneous fish, frogs breed quickly, the previous disinfection of the fish ponds, when the water must be packed with a dense filter cloth inlet, to avoid miscellaneous fish flowers or eggs into the fry cultivation pool. Clean the filter cloth every 1-2 hours to prevent clogging. In front of fish ponds, the water level should be controlled between 80-100 cm. If the water level is too shallow, and the water temperature is high (more than 34°C) during the high temperature season, the fish flower will easily become violent; if it is too deep, the water quality will be difficult to control.
Third, before cultivating the water quality, the water quality needs to be clear, cool, tender, and green bean color. The transparency should be 20 cm. If the pond is crystal clear after poison ponds, it is advisable to vote for gantadine or perishable turfgrass to increase the plankton's purpose and ensure that there are enough natural feeds after the pond falls. If the pond water is too fat, the living water can be properly increased to raise the water level. Fourth, the daily feeding and management of fish after falling pool (generally 3-4 days after the emergence, and then fall into the cultivation pool), the second day began to feed the egg yolk or soy milk, 10,000 fish fry with 2 egg yolks or 300 grams of soybean mash, Feed it every day and twice in the afternoon. The egg yolks should be sprayed with nylon filter cloth in the pan and then sprayed evenly. After 3-4 days of feeding, the mixture was changed to 30% soybean, 15% wheat bran, 15% corn, and 40% peanut bran. After fully mixing, pulverize with a pulverizer. Use 2-3 kg of dry powder for every 10,000 fish fry. After the water is dissolved, it should be sprayed evenly on the pool every two times. In addition, due to the high feed temperature, the fry grows fast and after a week of feeding, the fry may float. If this situation is not handled properly, it will cause all suffocation to die, especially in the hot weather before the storm. Prevention measures are as follows: 1 The rotten grassy residue in the fry pool should be removed in time. 2 In the early morning, you should take a tour of the pond early. If there is any abnormality, flush the water immediately or take other oxygenation measures. V. Disease prevention and control The biggest natural enemies of autumn cod seedlings are blisters and blisters, and countless young fry are eaten daily. This is one of the main reasons for the low survival rate of young cod fish. The following preventive measures can be taken: In addition to the clear pond, the water should be strictly shut off, and the fish and ponds should be treated with trichlorfon and kerosene two days before the ponds are dissolved. Quanchiposa should be used. Each mu of water depth is 1 meter with 0.5 kg of trichlorfon with 0.5 kg. Kerosene, then mixed with 2 pounds of fine sand, the entire pool spilled evenly, up to the purpose of killing the enemy.
After the fry have been cultivated for 8-10 days, they can grow to 5-6, and trichodiasis may occur at this time. Symptoms are: slow movement, white mouth or lid swelling. If measures are not taken in time, the survival rate of the fry will be significantly reduced, even only 10%-20%. Therefore, when it reaches the age of 6-7, when the copper sulfate and ferrous sulphate mixture is used, 0.5:0.2 ppm of water dissolves and the whole pool is splashed once, which can prevent disease. If fish ponds are found to be onset, they should be sprayed with the drug twice a day (once a day), or 3-4 days after the fish flowering pool, and the buckwheat leaves (1 meter deep) can be bundled with 30-40 kilograms. Water, placed in the corners of the pond, can also be used to prevent disease.
The cultivation of the autumn eel fry should grasp the above-mentioned links, and generally, after about 20 days of feeding and management, it can reach the market specifications of 7-8 North.