3. Cage culture Cage culture can be carried out in ponds, lakes, reservoirs and other bodies of water. In areas where the water is shallow, such as lakes, reservoirs, etc. can be cultured in a fishbowl. In places where the water is deep, such as lakes and reservoirs, cages can be used for breeding. A. The mode of fishing net cages: The specifications of the cages are (2m to 4m) (1.5m to 3m) (1m to 1.5m), open, double-layered, and the outer layer is 32mm mesh. Mesh 20 = 1.5 cm and the inner layer is 20 mesh nylon screen cloth. At the bottom of each carp cage, a "+" shaped frame made of bamboo straw is bundled, the size of which is the same as that of the bottom net. In the cages, weeds of A. philoxeroides or water hyacinths are used as shelters, and the coverage rate should be above 90%. Among them, some calamus can be stocked for disease prevention. At the same time, a feeding point is set for every 3 to 5 square meters of cage area. The aquaculture area should be selected where the water flow is not urgent, micro-flow, no industrial wastewater is discharged, and the water quality is good. B. Fixed cage culture method for transplanting: Compared with conventional cement pools, small earthen ponds and other feeding methods, the cage-free culture of amberjack has the advantages of less equipment investment, light labor intensity, easy management and operation, and flexible and simple catching and catching. Astragalus ingest concentration, rapid growth, high yield characteristics. The material of the cage is sewn with high-quality polyethylene screen mesh. The mesh with good quality looks bright. The diameter of the upper and lower wire ropes of the cage is 0.2 mm. The size of the cage is generally determined by the size of the water body. Common is 5 meters to 8 meters long, 2 meters to 4 meters wide, 1.5 meters to 2.0 meters deep, each cage 10 square meters to 15 square meters. The cage is filled with 0.8 to 1.2 meters of water, and 0.5 to 0.8 meters of water is exposed. The distance between the bottom of the tank and the bottom of the tank is preferably 0.5 to 0.8 meters. As for the number of cages, it should be determined according to the specific circumstances. If the water body is large, the water exchange is convenient, the operation is convenient, and the whole pool is full, but if the water body is small and the exchange is difficult, it cannot be put too much. Because the water is in an anoxic state for a long time, the water quality is easily deteriorated, which affects the growth and even the onset of carp. It is advisable that each row of cages be separated by 0.5 m to 1 m in order to facilitate the passage of bait vessels and the movement and exchange of water bodies and to avoid the lack of oxygen in water bodies. The area of ​​the cage is preferably 1/3 to 2/3 of the area of ​​the water body. The cages should be stocked with aquatic plants, such as water peanuts, oil grass, and water hyacinth. The water plants must be put in more water. It is better to cover the entire surface of the cage after survival. Too much water and grass should be removed in time and in appropriate amounts. At the same time, it is necessary to pay attention to the cultivation of oilseeds when entering the month of October, because in the winter, peanuts and water hyacinth will die. Aquatic plants mainly have the following functions: 1 The habitat of the catfish is to avoid the aggregation of catfish at the bottom of the cage. 2 Absorb nutrients inside the box to reduce pollution. 3 Avoid direct sunlight, stabilize the water temperature, reduce the temperature difference between day and night, shading the shad in the summer. Note that in the aquatic plants, 3 to 4 holes larger than the plate should be left depending on the condition of the cage surface. However, all aquatic weeds should not be removed. Some grass stems should be left to prevent the mixed group of feed and fish from sinking into the bottom. The eel feeds, reduces eel activity and increases feed conversion. The cages must be soaked for 7 days to 15 days before they are put into use. Because the carp is fish without scales, it is very vulnerable to injury. This will prevent secondary infections caused by carp abrasions. The specifications for feeding catfish are generally 30g to 50g/bar, and the specifications are better. Because this type of carp is at the beginning of the peak of growth, it is easy to feed and has a high survival rate. At the same time, this quail relative to the larger size squid, the unit weight of the seedlings will be more, thereby reducing the cost of buying seedlings. Due to the fact that artificially propagated squid technology is not yet mature and the amount of spawning of Astragalus is limited, the cultured scutellaria species generally come from natural fishing. Alfalfa seedlings are released from April to August. When the temperature is higher than 15°C, the seedlings are best released. Therefore, when the temperature is stable, the food intake of sturgeon is relatively stable, and it is easier to tame and is not susceptible to disease. There are also farmers who released seedlings in October. One thing that needs to be reminded is that at this time, seedlings must be paid attention to timely fertilizer and safe wintering, otherwise it will cause unnecessary economic losses. The density of seedlings is generally controlled at 500 g/sq.m. Before stocking, it must be soaked with 3%-5% saline or 20g/m3 potassium permanganate for 5 minutes to 10 minutes. (To be continued)