The latest course of seed sowing techniques and methods of Platycodon grandiflorum

Platycodon grandiflorum usually uses seeds to propagate, high-yielding plants should be selected to keep seeds, and the inflorescences on lateral branches should be removed in late August, so that nutrients can be concentrated on the development of fruits in the upper and middle parts, so as to promote the fullness of seeds and improve the quality of seeds. Autumn sowing is the best. Let's take a look at Platycodon grandiflorum seed propagation techniques.

Selection method of Platycodon grandiflorum

Platycodon grandiflorum seeds should be more than 2 years old non-aging seeds (seeds accumulated for one year, the germination rate should be reduced by more than 70%), and germination tests should be carried out before planting to ensure that the seed germination rate is more than 70%.

Seed treatment of Platycodon grandiflorum

Soaking seeds with warm water for 24 hours before sowing, or soaking seeds with 0.3% potassium permanganate for 12 hours, can also be treated with ultrasonic wave, which can significantly improve the germination rate of seeds, and the germination rate of treated seeds is 25.5% higher than that after treatment.

Sowing techniques of Platycodon grandiflorum

Platycodon grandiflorum can be sowed in spring, summer and autumn, and autumn sowing is the best from late October to early November. there are two sowing methods: warm scalding soaking and dry sowing. It is recommended to sow seeds after warm scalding soaking seeds so that seedlings can emerge early.

1. Warm hot soaking method: put the Platycodon grandiflorum seeds in warm water, then stir until the water is cool, soak for another 8 hours, cover the seeds with wet cloth, cover them with wet sacks, rinse them with warm water every morning and evening, about 5 days, and sow when the seeds germinate. Sowing the seeds evenly in the ditch, because the seeds are small, you can use fine sand and seeds to mix well before sowing, cover the soil or ash after sowing, and water and moisturize after sowing in arid areas. The seed consumption is 500,750g per mu. During seedling emergence, attention should be paid to loosening the soil and weeding. When the seedling height is about 2 cm, the seedlings should be kept strong according to the distance between the plants. If the seedlings are sparse or broken, the seedlings should be replenished on a cloudy day. After applying rare human and animal dung water, cover it after application, apply it again and cultivate the soil to prevent lodging. Cover it after giving it. In addition, we should often loosen the soil and weed, water it in time in the morning, and harvest it at the end of autumn or before sprouting in early spring.

2. Dry sowing method: it takes about 25 days for dry Platycodon grandiflorum seeds to emerge, and it takes about 10 days for seeds to be sown. After the seedlings are unearthed, weeds should be removed in time, and the seedlings should be thinned if the seedlings are too dense. It is appropriate to keep 12 seedlings per 100 square centimeters and keep one seedling at an interval of 5 centimeters (about 60,000 plants per mu). In addition, Platycodon grandiflorum has a long flowering period and consumes a lot of nutrients. In order to affect the root growth, it is necessary to improve the root yield and quality by thinning flowers and fruits in time.