To do a good job of safe wintering management of pond fish culture can effectively prevent the occurrence of fish disease and “drowning pond†phenomenon, reduce unnecessary losses, and increase the economic benefits of breeding. The safe wintering technology for pond fish is introduced as follows:
1, strengthen feeding. In the late autumn and early winter, continue feeding of wintering fish, such as wheat bran, rice bran, bean cake, etc., supplemented with vegetables, tender grass, etc., and appropriate fertilization, so that the pool water to maintain a medium weight, so that fish can enhance the physical accumulation of nutrition to meet Winter needs to improve the ability to keep out the cold.
2. Prepare the pond. The size of the overwintering pool, where the sheltered winds are sunny, the water quality is good, and the water and electricity is convenient, can be determined according to the number of stocking, the heating method and the management level. The old cement pool is cleaned with clean water before use and used for every cubic meter of water. 20 grams of bleach disinfection. The disinfection method of Xinchi Lake is to control the water depth of the fish pond to 1.5 meters or so, and use 75 kg of quick lime per acre to water the whole pond for disinfection. In addition, it should be equipped with heating equipment.
3, reasonable stocking. When the water temperature dropped to 16°C, stocks of healthy broodstock and fish were selected for stocking. Since the broodstock had a body weight of 150 g, the male-female ratio was 3:1, and the fish species were 3-5 cm long. Generally, 150-200 grams of broodstock will be reared for 30-50 fish per cubic metre of water, and 300-500 fish of 3-5 centimeters in length. With microfluidic conditions, stocking capacity may be appropriately increased. Before stocking, bathe the fish with 3%-4% saline for 30 minutes.
4, control the water temperature. During winter, the water temperature should be maintained at 16-20 °C. If the water temperature exceeds 20 °C, the fish will have a strong food intake, the activities will increase, the oxygen consumption will be high, and the water quality will be deteriorated. At this time, timely flushing and other methods should be used to reduce the temperature. If the water temperature is too low, the fish The food intake is weakened, the fish body is thin, and it is easy to get sick. At this time, heating equipment should be used to keep the water temperature relatively stable.
5, adjust the water quality. During the winter, the stocking density of fish is greater, and attention should be paid to regulating the water quality to keep the water fresh and tender, and the dissolved oxygen should be more than 4 milligrams per litre. If the water quality deteriorates and causes the fish to float, oxygen may be properly increased. Change the water about 30% every 7-10 days. Timely remove residual baits.
6, reasonable feeding. Feeding should be based on the weather, water temperature, fish activity, and feeding conditions.
7, pest control. 1 hydromycosis. The body of the fish was covered with greyish water hyphae, and the diseased fish was slow in movement and loss of appetite, and they died one after another. Control methods: 2 mg/L gallnut liquid Quanchiposa, or 3% -4% saline soak 5 to 10 minutes, can also be wounded broodstock directly on the wound smear gentian violet. 2 Third generation worms. The disease was born on the skin, rays and stern of the fish. The diseased fish had more mucus, and the body surface was covered with a grayish mucous membrane. The original luster was lost and the sick fish were uneasy. 90% crystal trichlorfon was used to inject water once or twice a day. The concentration of water in the pond was 0.3-0.5 mg/l. 3 Trichinosis. The disease is caused by the infestation of the skin and tendon of the fish body by the trichoderma worm. The prevention and control method is to disinfect the limestone pond before stocking, and use a concentration of 0.7 mg/L copper sulfate and ferrous sulfate mixture (5:2) to spray the whole pond. .
1, strengthen feeding. In the late autumn and early winter, continue feeding of wintering fish, such as wheat bran, rice bran, bean cake, etc., supplemented with vegetables, tender grass, etc., and appropriate fertilization, so that the pool water to maintain a medium weight, so that fish can enhance the physical accumulation of nutrition to meet Winter needs to improve the ability to keep out the cold.
2. Prepare the pond. The size of the overwintering pool, where the sheltered winds are sunny, the water quality is good, and the water and electricity is convenient, can be determined according to the number of stocking, the heating method and the management level. The old cement pool is cleaned with clean water before use and used for every cubic meter of water. 20 grams of bleach disinfection. The disinfection method of Xinchi Lake is to control the water depth of the fish pond to 1.5 meters or so, and use 75 kg of quick lime per acre to water the whole pond for disinfection. In addition, it should be equipped with heating equipment.
3, reasonable stocking. When the water temperature dropped to 16°C, stocks of healthy broodstock and fish were selected for stocking. Since the broodstock had a body weight of 150 g, the male-female ratio was 3:1, and the fish species were 3-5 cm long. Generally, 150-200 grams of broodstock will be reared for 30-50 fish per cubic metre of water, and 300-500 fish of 3-5 centimeters in length. With microfluidic conditions, stocking capacity may be appropriately increased. Before stocking, bathe the fish with 3%-4% saline for 30 minutes.
4, control the water temperature. During winter, the water temperature should be maintained at 16-20 °C. If the water temperature exceeds 20 °C, the fish will have a strong food intake, the activities will increase, the oxygen consumption will be high, and the water quality will be deteriorated. At this time, timely flushing and other methods should be used to reduce the temperature. If the water temperature is too low, the fish The food intake is weakened, the fish body is thin, and it is easy to get sick. At this time, heating equipment should be used to keep the water temperature relatively stable.
5, adjust the water quality. During the winter, the stocking density of fish is greater, and attention should be paid to regulating the water quality to keep the water fresh and tender, and the dissolved oxygen should be more than 4 milligrams per litre. If the water quality deteriorates and causes the fish to float, oxygen may be properly increased. Change the water about 30% every 7-10 days. Timely remove residual baits.
6, reasonable feeding. Feeding should be based on the weather, water temperature, fish activity, and feeding conditions.
7, pest control. 1 hydromycosis. The body of the fish was covered with greyish water hyphae, and the diseased fish was slow in movement and loss of appetite, and they died one after another. Control methods: 2 mg/L gallnut liquid Quanchiposa, or 3% -4% saline soak 5 to 10 minutes, can also be wounded broodstock directly on the wound smear gentian violet. 2 Third generation worms. The disease was born on the skin, rays and stern of the fish. The diseased fish had more mucus, and the body surface was covered with a grayish mucous membrane. The original luster was lost and the sick fish were uneasy. 90% crystal trichlorfon was used to inject water once or twice a day. The concentration of water in the pond was 0.3-0.5 mg/l. 3 Trichinosis. The disease is caused by the infestation of the skin and tendon of the fish body by the trichoderma worm. The prevention and control method is to disinfect the limestone pond before stocking, and use a concentration of 0.7 mg/L copper sulfate and ferrous sulfate mixture (5:2) to spray the whole pond. .