Campanulaceae is a traditional Chinese traditional Chinese herbal medicine, mainly produced in Hebei, Anhui, Hubei, Zhejiang and other places. In recent years, in addition to being one of the country’s 40 largest traditional Chinese herbal medicines sold, China’s largest market is exporting more bulk vegetables to countries such as South Korea. Exports have increased year after year. Products are in short supply, prices have risen sharply, and market prospects are improving. . Its cultivation techniques are as follows: 1. Site preparation and soil preparation. The Platycodon grandiflorum is a deep-rooted plant. It is appropriate to choose a deep, loose, fertile, well-drained humus or sandy loam. After selecting the land, apply 2500 kilograms of compost or manure per acre, add 20 kg of superphosphate, throw it into the ground, deepen it over 30 centimeters, make it smooth, and make it 1.5 meters wide. 2, timely sowing. With seeds, breeding, generally using live, spring, autumn, winter can be, with autumn broadcast as well. The growth period of autumn sowing is long, and the yield and quality are significantly higher than that of spring sowing. Seeding with warm water for 24 hours before sowing can increase the germination rate. Insert the best, in the entire surface of a good line by 18-21 cm spacing ditch, deep 3 cm or so. Cover fine soil 1-2 cm after sowing. From March to April the following year, the seedlings emerged. The amount per mu is 1.5 kg. 3, field management. 1 reasonably close planting. Line spacing 18-21 cm, spacing 4-6 cm, basic seedlings per acre 70,000-80,000. Proper close planting is the key to increasing production. 2 weeding and weeding. The early growth of Platycodon grandiflorum grows slowly and it is easy to breed weeds. It should be removed in a timely manner. The planting ground should be firstly irrigated, and when the wet and dry conditions are suitable, the soil should be loosened once, so as to avoid the dry cracking of the ground and cause dead seedlings. 3 top dressing. Seedlings need to be applied to thin human urine 1-2 times to promote seedling growth. At the end of June, additional flowering fertilizers were used, mainly phosphorus and potassium fertilizers. After winter, winter fertilizers were applied and soil fertilization was carried out in combination with fertilization. When the plant height is about 1 meter in the spring of the following year, the amount of nitrogen fertilizer should be appropriately controlled, and topdressing phosphorus and potash fertilizers should be used to grow the stem thickly to prevent or reduce lodging. 4 Drainage. The Campanulaceae planting density is high. In the summer rainy season with high temperature and humidity, drainage drainage work should be done in time to prevent the accumulation of water and rot, resulting in reduced production. (5) The main diseases and pests are root rot and rust. Root rot can be controlled with 50% thiophanate 1000-times pouring; rust is cured with 97% dichlorine 400 times. 4, harvest processing. Plug in the year or the second year of excavation, generally in the autumn mining, the time should not be too early to start, so as not to affect the production; too late, difficult to scratch the root skin, not easy to dry. From the end of September to the middle of October, the excavation period is appropriate. After digging, go to net stems, leaves, and soil, and use a blade or glass sheet to scrape the skin and dry it. The color is white or slightly yellowish and the pattern of chrysanthemum is preferred. About 300 kilograms of dried product per mu, the dry rate is 30%.
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