Grass carp cages quickly breed new technology, which has a short cycle, high efficiency, and easy promotion. 0.2 kg to 0.3 kg of fingerlings, intensively reared in cages for 4 to 5 months, with tail weights of up to 1.5 kg to 0.25 kg, and a cage (30 m2) producing 750 kg of fresh fish, with an output value of 8200~ 8500 yuan, profit of 4500 to 5200 yuan.
1, aquaculture technology
(1) Water area selection. Should choose reservoirs, dams, large ponds above 1667 square meters. The cages are located in sheltered areas with sunny water, clean water, micro-flowing water, and water depth of 2.5 to 3 meters. When selecting a river dam, the cage should be set in a slow flow area, avoiding rapids.
(2) Feeding of fish species. Take grass carp as the main ingredient, with a small amount of earthworms, earthworms, blues, earthworms, squid and so on. The cages are set 10 days before the start of the fish species, so that the algae attached to them will be lubricated without damaging the fish body. 1 cage is used to put 600 to 800 large-scale grass carp species from 0.25 to 0.3 kg, with 20 to 30 species of fish such as cockroaches, cockroaches, blues, cockroaches, and cockroaches. (The eel is vulnerable to startle must be robust, disease-free, and free Injury, uniform in size, soaked with 30-40 g/L of salt for 5-15 minutes before delivery, disinfect the fish, and inject the grass carp hemorrhagic disease vaccine.
(3) feed feeding. To feed grasses such as ryegrass and sudangrass, if the water temperature is lower, the fish should be fed boiled sweet potato mixed rice bran, wheat bran, etc., or feed pelleted fish feed. When the water temperature is normal, it is necessary to ensure adequate supply of fodder every day, and regularly feed a small amount of alfalfa, wheat bran, glutinous rice cake, etc. When the fodder is insufficient, some fresh leaves or sugar cane leaves can also be fed. Feed feeding should be done at regular intervals (8 am, 2 to 3 pm) (1.2 to 1.5 times the fish weight) and positioning (fixed in the bamboo stalk frame).
(4) Daily management. Before and after the fish species goes down the box, pay attention to check whether there is any hole in the cage and prevent the fish species from fleeing; remove the attachments of the trench coat frequently to avoid plugging of the mesh; clear the leftover residual food out of the box before feeding; The weeds are fully wetted and spread evenly over the water, and they cannot be put in piles. With the increase of feed, the feeding frame should be increased. In the hot season, put a pergola on the feeding frame to facilitate grass carp eating.
2, supporting measures
(1) Reasonably set up the cages. A cage is suitable for 30 square meters and the mesh is 2 to 3 centimeters. The upper four corners are fixed on the wooden posts or bamboo box racks. Each corner of the box has a large stone to make the cage fully open into four squares. The box cover is 30 to 40 centimeters above the water surface. Multi-cage breeding, cage spacing 3.5 meters, more than 6 meters offshore to avoid the harm of rats, snakes. In order to facilitate patrols on dry, medium and late waters, small vessels should be deployed.
(2) Equipped with intensive fish fry pool. A fry intensive pool should be provided to breed fish species on their own, which can reduce investment and avoid the purchase of sick fish and dead fish. A cage needs to be equipped with 30 to 35 square meters of fry ponds, and stocks of 40 to 50 fish fry "spring flowers" or "summer flowers" are stocked per square meter. Before fry stocking, the water quality will be used to make plankton breeding. Raising the fry to more than 0.2 kg can be transferred to cage culture.
(3) Establish feed land. Grass carp cages are rapidly cultured, requiring 35 kg of high-quality forage for every kilogram of growth. Ensuring adequate supply of high-quality forage is the key to rapid, high-yielding production of grass carp cages. Each cage should be equipped with 260 to 330 square meters of feed, planting ryegrass or Sudan grass, etc., and applying topdressing urea once after mowing to promote early growth of grass.
(4) Prevent and treat fish diseases. In addition to doing fish disinfection and immunization when the fishes are under the box, they usually need to be treated early and have no disease. In the summer and autumn fish disease epidemic seasons, the whole box should be spilled with bleaching liquid and lime slurry on a regular basis. Use bamboo straws or cloth bags with strong chlorine, bleaching powder, copper sulfate, trichlorfon, etc. Fish disease. In the event of a fish disease, in addition to the above-mentioned preventive measures, medicine baits can also be taken orally.
1, aquaculture technology
(1) Water area selection. Should choose reservoirs, dams, large ponds above 1667 square meters. The cages are located in sheltered areas with sunny water, clean water, micro-flowing water, and water depth of 2.5 to 3 meters. When selecting a river dam, the cage should be set in a slow flow area, avoiding rapids.
(2) Feeding of fish species. Take grass carp as the main ingredient, with a small amount of earthworms, earthworms, blues, earthworms, squid and so on. The cages are set 10 days before the start of the fish species, so that the algae attached to them will be lubricated without damaging the fish body. 1 cage is used to put 600 to 800 large-scale grass carp species from 0.25 to 0.3 kg, with 20 to 30 species of fish such as cockroaches, cockroaches, blues, cockroaches, and cockroaches. (The eel is vulnerable to startle must be robust, disease-free, and free Injury, uniform in size, soaked with 30-40 g/L of salt for 5-15 minutes before delivery, disinfect the fish, and inject the grass carp hemorrhagic disease vaccine.
(3) feed feeding. To feed grasses such as ryegrass and sudangrass, if the water temperature is lower, the fish should be fed boiled sweet potato mixed rice bran, wheat bran, etc., or feed pelleted fish feed. When the water temperature is normal, it is necessary to ensure adequate supply of fodder every day, and regularly feed a small amount of alfalfa, wheat bran, glutinous rice cake, etc. When the fodder is insufficient, some fresh leaves or sugar cane leaves can also be fed. Feed feeding should be done at regular intervals (8 am, 2 to 3 pm) (1.2 to 1.5 times the fish weight) and positioning (fixed in the bamboo stalk frame).
(4) Daily management. Before and after the fish species goes down the box, pay attention to check whether there is any hole in the cage and prevent the fish species from fleeing; remove the attachments of the trench coat frequently to avoid plugging of the mesh; clear the leftover residual food out of the box before feeding; The weeds are fully wetted and spread evenly over the water, and they cannot be put in piles. With the increase of feed, the feeding frame should be increased. In the hot season, put a pergola on the feeding frame to facilitate grass carp eating.
2, supporting measures
(1) Reasonably set up the cages. A cage is suitable for 30 square meters and the mesh is 2 to 3 centimeters. The upper four corners are fixed on the wooden posts or bamboo box racks. Each corner of the box has a large stone to make the cage fully open into four squares. The box cover is 30 to 40 centimeters above the water surface. Multi-cage breeding, cage spacing 3.5 meters, more than 6 meters offshore to avoid the harm of rats, snakes. In order to facilitate patrols on dry, medium and late waters, small vessels should be deployed.
(2) Equipped with intensive fish fry pool. A fry intensive pool should be provided to breed fish species on their own, which can reduce investment and avoid the purchase of sick fish and dead fish. A cage needs to be equipped with 30 to 35 square meters of fry ponds, and stocks of 40 to 50 fish fry "spring flowers" or "summer flowers" are stocked per square meter. Before fry stocking, the water quality will be used to make plankton breeding. Raising the fry to more than 0.2 kg can be transferred to cage culture.
(3) Establish feed land. Grass carp cages are rapidly cultured, requiring 35 kg of high-quality forage for every kilogram of growth. Ensuring adequate supply of high-quality forage is the key to rapid, high-yielding production of grass carp cages. Each cage should be equipped with 260 to 330 square meters of feed, planting ryegrass or Sudan grass, etc., and applying topdressing urea once after mowing to promote early growth of grass.
(4) Prevent and treat fish diseases. In addition to doing fish disinfection and immunization when the fishes are under the box, they usually need to be treated early and have no disease. In the summer and autumn fish disease epidemic seasons, the whole box should be spilled with bleaching liquid and lime slurry on a regular basis. Use bamboo straws or cloth bags with strong chlorine, bleaching powder, copper sulfate, trichlorfon, etc. Fish disease. In the event of a fish disease, in addition to the above-mentioned preventive measures, medicine baits can also be taken orally.