Field management experience of Platycodon grandiflorum

First, the seedlings are fixed: when the height of the seedlings is 3 cm and 5 cm, the seedlings are fixed twice, and when the height of the seedlings is 10 cm and 12 cm, the seedlings are fixed according to the spacing of 6 cm to 8 cm.

Second, weeding in the middle ploughing: weeding and loosening the soil at the seedling stage, it is best to pull out weeds by hand when seedlings are young, and weeding should be combined with weeding each time. After planting, shallow ploughing and weeding should be done in time to keep the soil loose and free of weeds. In the second year of planting, the plant was weeded for 1 or 2 times before the ridge was closed, and after the plant grew up and closed the ridge, it was no longer suitable to carry out intertillage weeding.

3. Topdressing: generally topdressing 5-6 times. After setting the seedlings, one rotten ring fertilizer or urea should be applied in time, and the amount of urea should be 2.2 ~ 3 kg per mu. When the height of the seedlings is about 15 cm and when the plants bloom from June to July, the plants can be withered in the winter. It can be combined with clear ditch soil plus plant ash or soil miscellaneous fertilizer; after the seedlings start in spring in the second year, rare human and animal manure water should be applied once to accelerate the green growth of the plant. Before flowering from June to July, human and animal manure water was applied once, and 25 kg of calcium superphosphate was added.

Fourth, irrigation and drainage: watering the seedlings timely according to the growth of the plants, pay attention to drainage in the rainy season to avoid stagnant water in the field and cause rotten roots.

Fifth, clear the ditch to cultivate the soil: Platycodon grandiflorum planted for one year should be combined with fertilization to cultivate the soil after winter, and the amount of nitrogen fertilizer should be properly controlled in the following spring to increase the application of phosphorus and potassium fertilizer to make the stem grow stout so as to prevent Platycodon grandiflorum from lodging before flowering.

Sixth, flower and fruit thinning: Platycodon grandiflorum blossom and fruit to consume a lot of nutrients, affecting root growth, it is necessary to carry out appropriate flower and fruit thinning.