Practical planting techniques of Platycodon grandiflorum

First, cultivation methods: sowing in spring or late autumn, applying sufficient base fertilizer, and making beds after ploughing. Draw a small trench with a depth of about 1.5 cm according to the row spacing of 18-20 cm, push it flat with a big hoe after sowing the seeds, gently suppress it, if it is dry, do not water it temporarily if the border surface is moist, under normal circumstances, germinate in 6-7 days and emerge in 10-12 days. After emergence, pay attention to ploughing and weeding, do not plough too deep, mainly to cut the land.

Second, field management: in the middle of June, we should apply appropriate amount of fertilizer, use 10 kg urea or diammonium per mu, expand the roots after the beginning of the autumn festival, apply human feces and urine or three elements of nitrogen, phosphorus and potassium, and then water them. If powdery mildew is found, it can be treated with trimethoprim or carbendazim. Land that has not been planted with Platycodon grandiflorum is generally disease-free. Pay attention to drainage during the rainy season, and too much water in the bed for too long will cause rotten roots.

Third, harvest processing: grow for 1 year or 2 years, some areas can grow for many years, dig out at the end of autumn or spring, remove the soil, scrape off the skin and dry it as medicinal materials. Measures to increase production: spray an appropriate amount of potassium dihydrogen phosphate or rhizome dilatation during the growth period, and it is best to bury the fertilizer with soil during fertilization to increase the fertilizer efficiency.