Platycodon grandiflorum cultivation

I. form

Platycodon grandiflorum is a perennial herb, 30-100cm tall, the whole plant is smooth and glabrous, the root is fleshy, the outer skin is yellow-brown or grayish brown, the stem is erect, leaf blade ovate to lanceolate, long 2~7cm, broad 0.5~3cm, apex acuminate, margin sharply serrate, base cuneate. The flowering period is from July to September and the fruiting period is from August to October.

Second, the growth environment

Platycodon grandiflorum likes cool, moist, light and cold resistance. The suitable temperature range for growth is 10 ℃ ~ 20 ℃, the optimum temperature is 20 ℃, and it can bear the low temperature of minus 20 ℃. The plant grows well in humus soil or sandy loam with deep, loose and fertile soil and good drainage. Afraid of stagnant water, soil stagnant water is easy to cause root rot.

III. Planting techniques

1. Platycodon grandiflorum for land preparation is a deep-rooted plant, and humus soil or sandy soil with deep, loose and fertile soil and good drainage should be selected. After selecting the land, apply compost 2500 kg per mu, add 20 kg superphosphate, sprinkle it into the ground, turn more than 30 cm deep, level off and rake fine.

2, timely sowing Platycodon grandiflorum is mainly propagated by seeds, spring sowing, autumn sowing or winter sowing, 2 kg per mu. Can also raise seedlings and transplant, because the direct seeding yield is higher than transplanting, and the root straight bifurcation is less, easy to scrape processing, good quality, multi-use in production. Attention should be paid to using seeds to propagate with new seeds produced in the same year, the new seeds germinate quickly, the germination rate is high, and the seedlings are uniform, robust and beneficial to management. the germination rate of the old seeds in the next year is low or even can not germinate.

In order to improve the germination rate of seeds, the seeds can be treated first. Soaking the seeds in warm water for 12 hours before sowing, mixing well with appropriate amount of wet sand, stacking for a few days and then planting can obviously improve the germination rate. The strip sowing method was used to trench the finished border surface according to the row spacing of 18-21 cm, the depth was about 2 cm, and the soil cover was 1 cm after sowing. Or adopt the more advanced wide strip sowing method, that is, the width of the trench is 10 cm, the line spacing does not change, cover the soil after sowing, wide strip sowing method has many advantages, such as simple management, good quality of finished products, and so on. The temperature is suitable and the seedlings can emerge in about 15 days.