Technical points of management of carp cage culture

1. The choice of the location of the cage: the water where the cage is placed should be of fertile water quality, sheltered from the wind to the sun, flat at the bottom, moderate in depth (4 to 7 meters all the year round), no pollution, suitable water temperature, no flood, close to the village or the reservoir bay with a large farming area. 2. The structure of the cage and the structure of the ⑴ cage: the cage is usually sewn into a closed or open box with 6 pieces of mesh, which is rectangular or square in shape, and is fixed on a frame tied up with metal or square wood strips. The net cage of fish culture is 1 cm and the size is 20 to 30 square meters. Fish cage, mesh 2cm, generally about 60 square meters. Placement of ⑵ cages: there are several forms of cages, such as closed floating type, open floating type and open fixed type. Open floating cages must be blocked around to prevent escaping fish. The open fixed cage must be about 0.8 meters above the water surface, and all cages should be firmly placed. 3. Intensive cultivation of cage fish species ⑴ summer flower fingerling: carp are raised to black larvae in separate ponds, and quickly cultivated into 4cm in pond, which is suitable for cage culture. Screening and disinfection of ⑵ fingerling: large-sized summer flower fry should be trained first, then counted in bundles, raised in boxes according to specifications, and released at one time. ⑶ fish into the box: before entering the box, the fish should be disinfected and washed with 3%-4% salt water for 5 minutes, or with 5% salt water and 0.5% baking soda solution, depending on the tolerance of the fish species. The size of the free-range carp is 4cm and weighs about 3g. The stocking density is 800 × 900 tails / square meter. ⑷ cage culture fish: cage culture of carp adult fish, the ideal specification for stocking fish species is 50 grams per tail, generally 30 grams per tail, and a stocking density of 5 kilograms / square meter. Feeding and management of carp raised in ⑸ cage: carp raised in cage depended on artificial feed, mainly compound feed, and began to be domesticated as soon as the fish was put into the box, and should be fed for a few times. The pellet size of the feed should be matched with the size of the fish species to ensure both reasonable and complete nutrients and palatable size.