Main Breeding Techniques for Xiangyun Carp and Common Carp
The Xiangyun carp, scientifically known as *C. yunnanensis*, is a triploid fish produced through artificial hybridization between a tetraploid parent and a diploid carp. This species is highly valued for its delicious meat and fast growth. In pond culture, it can reach market size of 0.5 kg within 7 months, and the largest individuals can grow up to 1.5 kg in two years. It is well-received in the market due to its strong resistance to low temperatures, low oxygen levels, and diseases. It grows faster than its parents, has a high survival rate, and is easy to transport. Additionally, it is less likely to lose scales and is suitable for farming in various regions. The Xiangyun carp is now widely promoted across China, especially in Guangdong. In Zengcheng, Guangdong, farmers have developed effective techniques for raising this species. First, fry breeding ponds should be 3 to 5 acres in size with a water depth of 1.5 to 2 meters. The ponds must be leak-proof, with convenient irrigation and drainage. Before stocking, excess silt should be removed, and the pond should be disinfected using quicklime, tea bran, and bleaching powder to eliminate wild fish, pathogens, and parasites. A few days before introducing fry, farmers apply 500 kg of human and animal manure water to enrich the pond, making the water appear oil-green. The stocking density depends on water quality and temperature, typically around 80,000 to 100,000 fry per acre. After one week, the fry primarily feed on plankton and are supplemented with artificial feed such as corn, wheat bran, soybean cake, and peanut meal. After 20 to 30 days of rearing, the fry grow to about 3 cm in length. At this stage, they should be transferred to another pond to reduce density, promote growth, and improve the uniformity of the fish when they are ready for market. Second, coarse fish breeding management involves raising Xiangyun carp to larger sizes. These fish grow rapidly and can be sold as commercial fish within a year or used as fingerlings for further cultivation. For coarse breeding, the pond should be 5 to 8 acres with a water depth of 1.5 to 2 meters. Before releasing the fish, the pond must be thoroughly disinfected. Typically, 3.6 to 10,000 fish per acre are stocked, with 10% of the space occupied by grass carp and 5% by silver carp to balance the ecosystem. If there's a pig farm nearby, aerators and artificial feed can be used to enhance growth. Under these conditions, fish can reach 5 to 8 cm in length, producing about 400 kg of fish per acre, along with 100 kg of other species. Alternatively, 800 to 1000 Xiangyun carp fingerlings can be raised per acre, achieving a survival rate of over 90%. Cages can also be used for coarse breeding. These should be placed in large bodies of water that are sheltered from waves and deep enough (at least 2 meters from the bottom). Small to medium-sized cages are ideal, with mesh sizes matching the fish size. Each square meter can hold 600 to 800 fish. Feeding should follow the "Four-Point Method" and occur 4 to 6 times daily. Disease prevention is essential, and each square meter can yield 30 to 40 kg of fish. Using hot spring water for cultivation also yields excellent results. Third, adult fish (commercial fish) breeding involves polyculture with Xiangyun carp. However, it should not be mixed with other carp species like tilapia or bream, as they share similar feeding habits and may compete for food, affecting growth and market specifications. Stocking should occur early, with large-sized fry and appropriate density. Wintering seedlings can be grown before the Spring Festival, while summer fry are introduced in mid-May. The recommended size for wintering fish is 5 to 8 cm, and summer fry should be 4 to 5 cm. The density in polyculture is generally 300 to 500 per mu, depending on water quality and pond depth. A main pond can hold 2,000 to 3,000 fish per acre, along with 150 tadpoles and 80 to 100 frogs to help control algae and prevent eutrophication. Xiangyun carp can eat a variety of feeds, including plant and animal matter, organic debris, and phytoplankton. It thrives in fertilized water, so if no poultry farm is available, 200 to 300 kg of fermented organic fertilizer or 2.5 kg urea and 5 kg superphosphate should be applied every 10 to 15 days. Artificial compound feed with at least 33% protein should also be used. Since Xiangyun carp do not have a true stomach, they should be fed multiple small meals throughout the day. Feeding frequency varies: 4 to 6 times per day from April to June, 8 times from June to September, 4 to 5 times in October, and 2 to 3 times in other months. During summer and autumn, feed intake should be 5 to 8% of body weight, while in winter and spring, it should be 2 to 3%. Due to their tendency to escape during heavy rains, extra precautions must be taken during summer and autumn. Fourth, disease prevention is crucial. Although Xiangyun carp are generally resistant to disease, they can be affected if other fish in the pond are infected, especially with viral or bacterial diseases such as hemorrhagic septicemia or enteritis. Maintaining clean water is essential. Regular water changes and the addition of fresh water are necessary, especially in hot weather. Lime should be applied monthly at 20 kg per acre to improve water quality, neutralize acidity, increase pH, and release nutrients. Bleach (1 ppm) can be used for disinfection, often combined with lime. Regular use of “Fish Bikang†and “Chenjie†in feed helps strengthen fish immunity, promote growth, and increase yield. For more information, please contact: **Unicom: Hunan Xiangyun Biotechnology Co., Ltd.** **Zhang Bing** **Tel:** 0736-7301999 / 13973661742 **QQ:** [Not provided]d mannose,mannose plus cranberry,cranberry plus d mannose
Jiangxi Chengzhi Bioengineering Co., Ltd , https://www.chengzhi-bio.com