Koi carp is a carp, it has a bright and colorful color, changing patterns, is a large ornamental fish, enjoy the "live gems in the water" in the world. Koi originated from China, and its seed production was improved in Japan. After many years of crossbreeding, Koi has become a very systematic feature. Koi farming has received much attention because of its considerable economic benefits. Since the introduction of Japan’s Koi to China in the 1980s, it has been developing in the past 20 years, especially in recent years, as people’s consumer demand has increased and the level of appreciation has increased, and now it has become larger in the country, especially in the Pearl River Delta. The scale of Koi breeding, and become a very effective export products. The Koi pond culture techniques are now described as follows: I. Selection of Ponds Koi, as an ornamental fish, in addition to considering its growth rate in the breeding process, also emphasizes the cultivation of image beauty. Aquaculture products require a beautiful body and beautiful posture. In addition, the environment has a direct impact on the body's color. The best selection of ponds is humus soil, where the terrain is leeward, the grass is cultivated in water, and the purpose of improving the koi is achieved by artificially improving its living environment. It is best to have spring water, so that a variety of mineral elements and other ingredients in the water can increase the fish pigment, make the body brighter and more beautiful, and there is sufficient dissolved oxygen. Second, the breeding of Koi breeding Koi breeding age is generally between 3 and 10 years of age, weighing more than 1.5 kg. Choose a healthy, harmless, pest-free brood, and practice sex and sex breeding one month before the breeding season. The reproduction time of Koi is generally around May of each year. When the water temperature is stable above 16°C, the male and female Koi can be singled out in a ratio of 1:3 and placed in a prepared pool. Fish nest. Let it spawn on its own, observe the spawning of the broodstock immediately after its spawning, the fish nests are left in the pool for hatching, and the fry hatches after 5-7 days. Third, stocking feeding in the courtyard, the hotel directly for the purpose of viewing for the breeding of cement can be built ponds, the pool should not be too deep, with 0.6 to 0.8 meters is appropriate, easy to watch. This kind of rearing is monoculture, and the density can be slightly larger, and 3 to 5 koi carps can be stocked per square meter. A large area of ​​cement pond breeding, stocking density of 1 to 3 per square meter of water is appropriate, can be appropriate with grass, alfalfa, alfalfa, etc. for polyculture. Feeding adopts "Four Sets", and it is usually administered twice a day, morning and evening. After sunrise in the morning and before sunset in the afternoon, the daily feeding amount is 2% to 10% of the fish's body weight, and it takes 20 to 30 minutes to finish. Well, the types of feeds to be fed should be varied. At the same time, it is required that the bait be free from pollution and spoilage. Fourth, management and disease prevention should strengthen daily inspections. The Koi culture pond used for viewing should be kept clean and clean so as not to affect the ornamental effect. New water is added periodically or microfluidic aquaculture is used. The aquarium raiser pays attention to changing water and dipping water to keep the water fresh and suitable. Ponds require that the water quality be “fatâ€, “liveâ€, “tenderâ€, and “cool†to facilitate the growth of koi carps. In the hot and rainy weather, it is necessary to pay attention to the oxygen in the pond to prevent the occurrence of pans. Koi generally has strong vitality and rarely develops disease, but it is necessary to pay attention to disinfection of culture ponds and fish. Aquarium tanks can be rinsed with 3% saline solution for a short time when combined with water changes. Regular administration of quicklime, trichlorfon and other drugs and the feeding of furan-type baits are required for feeding in ponds, and timely diagnosis and treatment should be taken in ponds with severe conditions. At the same time, attention should be paid to preventing the harm and destruction of waterbirds, snakes, rats, and humans and avoiding unnecessary economic losses.
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