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High-yield cultivation techniques of Bupleurum chinense
Bupleurum prefers warm, moist environment, strong adaptability, able to resist drought, afraid of blisters, strong cold resistance. It grows best on fertile, loose sandy lands. Saline-alkali soils and places with poor viscous drainage are not suitable for planting. First, cultivation management The site selection site will be loose and fertile, well-drained sandy soil or sandy loam soil. Plunge the soil more than 30 centimeters deeper, break up the clods, and smooth the soil. Apply 1500 kg of spent manure per 667 square meters and turn it into the soil as base fertilizer. Make a sorghum width of about 1.3 meters, open the sulcus width 40 cm. 2. Propagation method 1 Live winter sowing in November, spring sowing 3-5 months, summer sowing in July-August, according to the soil temperature and rain conditions in various places to determine, with winter sowing is better, the seeds can be processed without direct seeding. Spring sowing and summer sowing must be treated with sand. The spacing of drills is about 20 centimeters, the hole spacing for hole sowing is 15-20 centimeters, and the seeding depth is 2-3 centimeters. 500-750 grams of seed per 667 square meters, mix well with the fire ash, evenly sprinkled in the ditch or hole, slightly suppressed after sowing. Spring sowing or winter sowing can be covered with plastic film after watering, and then sowing the film after sowing, or sowing straw and leaves after sowing. 2 Nursery transplanting should be carried out in early March and late April in spring. After the seeds are treated with sand, they are laid on a thin bed with a spacing of 10 centimeters and open shallow channels. The depth of the ditch is 1-1.5 centimeters. Spread the seeds evenly into the ditch, cover the soil, and after a slight repression, use a watering can to sprinkling water and cover the plastic film curtains. About 15-20 days after the seed germination, seedlings, timely removal of cover, until the seedling height of 4 cm, you can transfer soil with Daejeon. 3. Field management 1 Wet and moist weeds should be maintained before weeding and top dressing. After emergence, weeding often weeding, when the seedling height 3-6 cm when the thinning, until the seedling height of 10 cm or more, combined with loose soil by 6-10 cm from the Dingmiao, topdressing 15 kg of urea per 667 square meters. When the height of seedlings is 33 cm or more, 50 kg of rapeseed cake is applied per 667 square meters after weeding and weeding. In the second year after sowing, 10-15 kg of superphosphate and 5-7 kg of ammonium sulfate are applied per 667 square meters. Promote root hypertrophy. 2 Drainage Chaihu is afraid of leeches. During the rainy season in summer, it is necessary to pay attention to the drainage of the ditch, otherwise it may cause root rot and drastically reduce production. 4. Pest control 1 root rot is susceptible to high temperature and rainy season. Control method: Avoid continuous cropping; when transplanting, remove weak seedlings from diseased plants strictly; seedling roots are soaked with 50% thiophanate-methyl 1000 times solution for 5 minutes; increase application of phosphorus and potassium fertilizers before harvest; actively control underground pests and nematodes; attention during rainy season drain. 2 rust hazards stalk, control methods: the incidence of 20% Triadimefon 1000 times early spraying control. 3 leaf blotch damage leaves, control methods: rotation; early onset of the use of 1:12:20 Bordeaux mixture or 50% eutectic 1000 times spray control. 4 powdery mildew hazard stalk, control methods: reasonable thinning, clearance of hybrid seedlings to ventilate light; early onset with 20% Triadimefon 1000 times spray control. 5 Ascarids were often damaged at the seedling stage and early spring, and control methods: spraying with 10% imidacloprid 3000 times solution. Second, after harvesting and sowing, the second year after sowing, the crops will be harvested after shriveling in the second year of the plant. After excavation, the soil will be shaken to remove the stems and leaves, cut hairy, lateral and residual stems, and reeds, and stay within 1 cm. Then, they were sold in bundles of three or more grades of 0.6 cm or more, 0.4-0.6 cm, or 0.4 cm or less.