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Muddy earthworm is a kind of small-scale fish with very wide temperature distribution. It has strong vitality, adaptability to the environment, resistance to hypoxia and omnivorism, and is convenient for feeding and management. The meat is delicate, delicious, and has a high nutritional and medicinal value. People call it "water ginseng." The cultivation of loach in paddy fields has low cost and quick results, and has a promising market prospect. 1. The choice of rice fields. The paddy fields used for raising loach should meet the following conditions: 1 The sunshine is sufficient and the environment is quiet, away from waste water and pollution sources. 2 With plenty of water, irrigation and drainage are convenient, and the ridges are solid and watertight. 3 The terrain is low, the soil is fertile and the texture is soft. It can maintain a certain water level all year round. 2. Reconstruction of rice fields. 1 Heighten and widen the field ridges, so that the field ridge forms a trapezoid with a width of 50cm at the base, a width of 40cm at the top, and a height of 50cm. 2 Spread a thicker layer of plastic film or a denser nylon net over the field ridge to prevent escape. Membrane or net is 20cm above the ground and buried 10cm underground. 3 After the paddy fields are ploughed, dig 30 cm deep and 50 cm wide at a distance of 50 cm from the inside of the field plough, and then open a “wellâ€-shaped fish ditch in the field with a groove width of 30 cm and a depth of 25 cm. 4 In the inlet and outlet, use barbed wire or nylon mesh to prevent escape from the mud. 3. The cultivation of rice fields. 1 The rice planted should be dwarf, lodging resistant and disease resistant varieties. Paddy fields have 5 rows of rice for each row. 2 Reapply the base fertilizer before sowing and apply 250kg of fermented and decomposed livestock and poultry manure per 667 square meters to breed natural food and promote the growth of loach. After transplanting rice till mid-August, chickens and pig manure 25kg were applied every 15 days. In addition, according to the growth conditions of rice and alfalfa, it is also possible to appropriately apply the quick-acting fertilizer, and it is appropriate to apply 10 kg of urea per 667 square meters. 3 When diseases occur in rice, high-efficiency and low-toxicity pesticides should be used for prevention and control. Such as dimethoate, etc., and the use of conventional doses, should not increase the amount. Before the application, keep the water depth in the field at 6-9cm. Powder pesticides should be applied in the morning with dew, and water-based pesticides should be sprayed after sunny dew, and should be sprayed on rice leaves as much as possible to avoid direct spray into the water. 4. Stocking of seedlings. Loach seedlings are sourced from wild species or introduced. Loach generally starts stocking 10 days after rice is transplanted. Seed size specifications for body length 4 ~ 8cm is good, with an average of 60 ~ 80kg per 667 square meters. 5. Feeding management. 1 After the stocks are stocked, the water depth of the rice fields is maintained at 5 cm or more. In the hot season, the water depth should be kept above 10cm. At the same time to keep the field fresh water, if found muddy floating head, should immediately change the water. 2 In addition to applying base fertilizer and top dressing, you should also feed bait. According to the weight of the fish, 1% to 1.5% in the early stage, 3% in the middle stage, and 3% to 5% in the later stage. The main bait is wheat bran and rice bran. It's best to feed in the night and make a full investment. Cloudy weather and low atmospheric pressure should reduce the amount of feeding. 6. Disease prevention and control. In the first 10 days of stocking, seedlings made of lime 20 kg per 667 square meters were sprayed and sterilized throughout the field. The bleaching powder 1 mg/kg was sprinkled once every other month during the breeding process. If the loach appears to have rot, erythroderma, and enteritis, use 0.5kg of soot per 667m2 of paddy field to place it on the corners of the paddy field, press it with stones, soak it in paddy field water, or use the ant nest on the tea tree 1～ Two, fired ash mix feed. If there is a bubble, immediately after the new water is added, the water is splashed with 4 to 6 kg of salt per 667 square meters of water. 7. Fishing. Mudworms are generally farmed for 4 months and their body length reaches 10cm. When the body weight reaches 12g, they can be harvested and sold. Fishing is usually used bait hunting method, that is, in the fish into the loach to eat food like bait, such as fried wheat bran, rice bran, animal organs, red clams, etc., to be a large number of loach when you enter the cocoon can be chopped. Author: College of Animal Science and Technology, Hunan Agricultural University