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Cultivation Technique of Platycodon grandiflorum
(1) Collecting seed Platycodon grandiflorum can be harvested from green to yellow. After harvesting, the pods should be dried in a ventilated and sunny place. After the pods are dried (for shaking the seeds, there is a crash sound), and then the tools are used to pull the seeds out. After the seeds are sprayed, they are allowed to air for 2-3 days. When the moisture content of the seed is less than 10%, collect it and plant it for the coming year. (2) Select the land to do the hi-foot beaming, hi loose soil, deep flat land or mountains. 1 Mountain selection. On Yangpo Mountain, the soil layer is not less than 40cm long. Eradicate weeds, remove roots and stones, and make ridges in Yokoyama. The ridge width is 30cm, and the ridge width is 20cm. The ridge distance is 20-25cm. 2 flat ground. Flat land to choose deep soil, deep plowing after bed. The bed is 40 cm high and 100 cm wide. 3 fertilization. The wild Campanulaceae grows more in the humus-rich zone, plus the thick roots and large plants, require sufficient fertility to meet the growth needs. Before making beds and ridges, he applied 45,000-60,000 kilograms of manure, then mixed with 300 kilograms of diammonium phosphate and turned it 20 centimeters underground. (3) After sowing temperature stabilizes in spring, it can be sown. Cross bed ditching and sowing, row spacing 30 cm, and strive to sow uniform; ridge hole sowing sowing 3-5 seeds per hole, buried depth 2 cm, with wooden clogs to suppress. Plant spacing 20 cm, spacing 30 cm is appropriate. (4) Field management 1 seedling. After the seedlings of Campanulaceae go out, the first seedlings were planted. According to the predetermined plant spacing, one vigorously growing plant (stem size, leaf size, and color density) was selected as reserved seedlings, and then one similar plant was selected or grown slightly in the vicinity. Poor plants serve as seedlings. All other seedlings are removed. Edible. The second seedling was carried out 10 days after the first seedling. That is, in the case of a normal reserve seedling growth, remove the reserve seedlings, such as reserved seedlings are not as good as reserve seedlings, then leave the reserve seedlings. The seedlings of Platycodon grandiflorum are crucial for the later development of the root system. Can not be more than one strain, in order to ensure that the root system has enough nutrients to promote post-autumn production. 2 irrigation. After the Platycodon grandiflorum seedlings are out, we must keep the soil moist, which is also determined by its habits. You can use the watering can to spray water, pay attention to the morning and evening. In case of spring drought or high temperature, furrowing should be carried out for ridge sowing, and large amount of water should be sprayed on the bed. 3 loose soil weeding. Because the root of Platycodon grandiflorum grows rapidly under the conditions of loose soil. Every 10 days and a half months of cultivating loose soil once, in order to increase the permeability of the land, to facilitate the development of the root system. Ground weeds are removed throughout the life cycle, creating a non-competitive environment around the bellflower.