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Linxia Aquatic Technology Promotion Station actively introduced new varieties and conducted bold experiments to study the successful propagation of the artificial propagation and fry cultivation techniques of the koi fish. In mid-April, 2002, the station successfully transferred 86 pigs of Koi species from the field to the specialized household pond in Dachuan Village, Yongjing County. Then it began to be promoted in the whole province, solved the problem of adjusting seeds from other places for many years, and brought considerable economic benefits to the people. At present, 40% of the farmers in the state are breeding koi, and their growth is gratifying. The techniques and methods adopted are summarized as follows: 1. Broodstock breeding. The broodstock was cultivated from Dachuan Village (Linxia State New Variety Test Base) in Yongjing County in 2002. The cultivation process was carried out in the form of nesting, and the wild fish in the commercial fish pond and the puffer fish were used as the bait source. After the Koi seedlings are released, the water temperature is maintained above 20°C depending on the temperature change. Generally, two flushing stimuli are selected in early April, and spawning starts on April 11-12 and the oviposition rate of male and female 11 groups reaches 60. %the above. Second, hybrid breeds. For the hybrid breeds cultivated by the Koi, we have used various methods and varieties for hybridization after several tests. Finally we selected the third-instar Koi carp hybrids with the Hoh-Gold Oyster to cultivate the famous Koi carp which is large, robust, and shiny. Excellent variety. The broodstock of the female broodstock is swollen and soft, the contour of the ovary is obvious and has certain fluidity; the male broodstock is slightly stiffer in the abdomen, does not inflate, and is slightly narrower in the abdomen than in the female. Third, spawning and emergence time. According to the individual size of male and female new fish, they are placed in the spawning pool one after another. The temperature of the water is kept above 20°C. After the male and female are gradually adapted to the water temperature, the chase phenomenon begins to appear gradually. Some female and male fish pairs around the fish nest. Swimming, then began to spawn and fertilize. Generally 7 days after the start of emergence on May 19, can be all in 19-20 days out of Qi, if the water temperature is below 20 °C, directly affect the emergence rate and time delay. Fourth, the daily management of seed cultivation, summer flower cultivation. Koi fry were hatched within 4-6 days after hatching, and their yolk sac was used as a nutrient source. At this stage, the fins were not fully differentiated and only intermittent vertical swimming was allowed. This time began to splash soybean milk into the hatching pool, first soaked with warm water for 8-10 hours, soaked to soy beans full, gently knead the valve is appropriate, and then ground into milk, grinding beans while adding water, each grinding Soybean 10 kg, soy milk boiled Quanchiposa, spilled 2 times a day, 1 on the afternoon, every time when the sprinkling extended sprinkling time to ensure that the milk particles in the water layer have a longer residence time, thereby increasing the fry Feeding opportunities. During the cultivation period, the changes in water quality and the composition and quantity of zooplankton were closely observed. The color of the water remained yellow-brown. Zooplankton and rotifers were the dominant species in zooplankton. 2, fish species cultivation. With the continuous growth of Koi summer flowers, gradually increase the amount of milk, Quanchiposa 4 times a day, while top dressing (cow, pig manure and other organic fertilizers), 15 days after the milk feed, start feeding granular feed 7% (by fish The calculation of the catty number means that 0.5 kg of fish is fed 0.35 kg of feed, 100 pigs/2.5 kg (20 pigs) = 0.18 kg of feed per day, and 50 kg of fish (3.5 kg feed per day). After 15 days of feeding, the pelleted feed increased to 15%. After 15 days of continuous feeding, the pelleted feed increased to 20%, and at the same time, the feeding management and disease prevention and control were strengthened. By the end of September, when the nets were pulled out of the pond, the average weight was about 0.05-0.1 kg, and 120,000 emerged. The emergence rate reached more than 60%. V. Economic Benefits 1. After the experiment has been successfully promoted, the economic benefits are very considerable. The benefits of the fish are 1.5 times higher than those of the ordinary fish, and 0.01-0.02 yuan per carp of the summer carp, and 0.15-0.25 per carp of the summer carp. 2, the economic value of the species, mainly engaged in fishing industry and watch, but also edible. With the continuous development of society, people’s material living standards and spiritual and cultural needs have been increasing year by year. People are increasingly interested in fishing and ornamental fisheries, and they pay attention to physical and mental health, beautify their homes and the environment.