In recent years, Aphrodite has been rapidly promoted as a rare freshwater aquaculture variety. Practice has proved that in the pond or large water surface, the main and mixed breed Aphrodisiac has a higher economic value, and the current supply of large-scale species of fish is the bottleneck of commercial fish breeding. According to the author's practice, the key techniques for cultivating the large white fingerling species of Aphrodisiac are now summarized as follows. I. Conditions and Preparations for Fish Breeding Ponds 1. Pond Conditions The fish ponds are required to be close to the water source, have good water quality, and have convenient drainage and drainage; the bottom of the pool is flat and the sludge is less; the pool ridges are firm and do not leak. Each pond has an area of ​​about 2,000 square meters and a water depth of 1.5 meters to 1.8 meters. 2. Clearing pond disinfection Generally, the pool water is drained in early May. Excessive silt is excavated, so that the bottom of the pool is exposed to sunlight for about 20 days, and then the water is 10 centimeters in diameter. Lime 150 kg/mu of water is used to disperse the whole pool after dissolving the slurry. . 3. Fertilizer bait Summer flowering 10 days before stocking, filtered water injection to a water depth of 1.2 to 1.3 meters, application of fermented organic fertilizer (manure, cake fertilizer can be, depending on the amount of pond sediment, generally 50 kg/mu ~ 100 kg/mu) to cultivate natural food organisms in the pool. 4. Other facilities Each pond needs to be equipped with a 1.5 kW or 2.5 kW aerator and equipped with a pump pump. Around the pond, 1 to 2 feed stands were constructed using materials such as lugs. The pond can be planted with about 10% of the total pond area of ​​aquatic plants. Second, the selection and stocking of summer fish species 1. Purchase time In early July, purchase the summer fish from the regular seed market. The broodstock is required to be captured from natural waters or have a distant kinship. Breeding fry are cultivated from 20 days to 25 days, and their body length is more than 2.5 cm. The specifications are the same, and there is no disease or injury. 2. Perform 3 to 4 pull-net exercises before transporting. Fishing should be carried out when the water temperature is low in the morning or in the evening. 30 cm in length, 30 cm in 40 cm nylon bag, 3 to 4 liters of water in each bag, 1,500 to 3,000 in summer, and can be transported for 12 to 18 hours. Summer fishing and packing should be carried out with water. In order to prevent the nylon bag from being damaged during transportation, it can be packed in a special cardboard box, and then tied with a rope to make it ready for shipment. During transportation, if the time is longer, you can change the water in the middle. 3. After the summer flowering and summer flowers are transported, the oxygen bag containing the fish is first immersed in the pool water for about 20 minutes. After the measured temperature difference is within 2°C, the fry is put into the pool. In order to make the cultivated species reach 13 cm to 15 cm, the amount of stocking should be controlled within 10,000/mu. Third, the feeding and management of fish species 1. Feed the early feed to the use of natural food cultivated in the pond as the main, appropriate feed powder feed, later use pellets or extruded feed (fish meal, silkworm meal, soybean meal, bran Etc.) Appropriate supplementation of fish fry or summer flower as live bait is normally conducted twice a day, and the amount fed is 5% to 6% of the body weight of the fish. 2. Water quality control During the entire feeding period, the water quality should be in accordance with the requirements of fertilizer, live, tender and cool. If necessary, new water can be added. It is best to use uninterrupted circulating water, or to turn on the oxygen aerator regularly to ensure the water quality. Not turbid, clear and colored, dissolved oxygen is sufficient, and the transparency is more than 30 cm. 3. Day-to-day management Insist on the Xuntang 3 times in the morning and evening to observe the feeding, activity and survival rate of the seedlings, and regularly check the types of floating organisms in the water to determine the number and quantity of feeding, fertilizing and water injection. 4. Fish Disease Control Summer fish species are to be disinfected by a medicinal bath before transporting them on the breeding ground. During the cultivation period, pesticides with small side effects or splashed lime can be periodically selected for insecticidal disinfection. Microbiological preparations can also be used to improve the immunity of Aphrodisiac. Fourth, fingerlings for catching and transporting fish should be caught in warm and sunny weather from November to April next year. At least 2 pull-net exercises must be performed before catching. They need to stop for 2 days and flush with water for 3 hours. Oxygen shipments using nylon bags do not normally exceed 0.5 kg per pack of fish. If fish fingerlings are packed with fish gills, the inner wall of the gills should be smooth and can be lined with dense mesh or plastic film. The shipping density is about 30 kg/m3 of water body, and pure oxygen is used in the fish gills.
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