The key points of Fangfeng planting technology, root propagation, harvest in the same year, seed sowing and harvest in 2 years.

Environment: it is suitable to plant in warm and humid areas, and select sandy soil with deep soil layer, good drainage and irrigation conditions and loose and fertile soil. Planting method: raise seedlings after the beginning of spring, plant upright into holes, and water them after planting. Direct broadcast: the sowing rate is about 1.5 kg per mu, and autumn sowing is more neat than spring sowing. Management: keep the soil moist after emergence, weed and loosen the soil regularly, do not lose stalks during weeding and topdressing, otherwise the yield will be affected.

I. planting environment

1. The root of Fangfeng is thick and long, which is suitable for growing in warm and humid areas, so it is appropriate to choose sandy soil with deep soil layer, good drainage and irrigation conditions and loose and fertile sandy soil.

2. After selecting the land, apply 5000 kg of soil and miscellaneous fertilizer or ring fertilizer, mash it and scatter it evenly, and make a flat bed of about 1 meter.

II. Planting methods

1. Root cuttage seedling raising

(1) after the beginning of spring, from the beginning of March to the middle of March, dig a fish fry pond with a depth of about 35 cm and a width of about 1.3 m in the leeward direction.

(2) mix the sand, furnace ash and fertile soil well, pour it into the pool, about 20 cm deep, dig out the Fangfeng field that needs to be harvested at the beginning of spring or the seed field left last year, pick out the sturdy, uniform and robust roots, sort them into small handfuls, and transport them to the edge of the pool.

(3) cut into small segments of about 5cm in order, and insert the upper end upward, vertically or slightly tilted into the pool, leaving a little space between them.

(4) after all the insertions are finished, the soil is leveled and covered shallowly. Pour it into the pool with about 40 ℃ of warm water, pour it thoroughly at once, put a few bamboo poles on the surface of the pool, and then cover it with plastic film. If the temperature is too low at night, you can cover the film with a layer of grass curtain and fix it with wet mud around the film.

(5) wait for the weather to warm up, remove the grass curtain, sweep the grass powder, shoot off the water droplets in the film, and let the sunlight into the pool as much as possible, which can increase the temperature in the pool. In the early and middle of April, adventitious buds will sprout at the upper end of the root segment and can be transplanted.

2. Root cuttage and field planting.

(1) before planting, first pour water into the nursery pond, dig it out with a small shovel, and never pull it out with your hands.

(2) after moving the seedlings in the field, dig holes according to the spacing between plants and rows of about 25 cm, plant them vertically into the field and cover the soil shallowly.

(3) pay attention to planting upright into the hole when planting, otherwise there are more lateral roots, which is easy to affect the quality of medicinal materials.

(4) watering should be carried out after planting, and then watered again after 3 days. After a period of time, seedlings will grow out.

3. Live broadcast

(1) it is not dry in spring. North China is around April and the Northeast is sown in the middle of May.

(2) first of all, trench is carried out according to the distance between rows of about 20 cm, and the depth is about 1.5 cm. Spread the seeds evenly, cover the soil with about 1 cm of soil, water and compact them, and keep the soil moist at any time to facilitate the emergence of seeds.

(3) the sowing rate is about 1.5 kg per mu, and autumn sowing is generally more neat than spring sowing.

4. Raising seedlings

(1) to make a flat bed of about 0.9 meters in Xiangyang area and sow seeds at the end of March and the end of April, strip sowing or sowing can be used.

(2) the row spacing of strip sowing is about 10 cm, open a shallow trench, spread the seeds evenly into the ditch, cover the soil and compact, and then spray water.

(3) or pour water through the sunny border before sowing, and sow seeds after all the water is absorbed.

5. Sowing

The main results are as follows: (1) after sowing, a thin layer of soil is covered with a sieve, and then covered with plastic film or straw curtain, which helps to keep warm and wet and improve the germination speed of the seeds.

(2) wait for the seedling to grow to about 6 cm, dig into the field together with the soil, and water it in time so that it can survive.

(3) when the seedlings produce new roots or leaves, the soil can be loosened and the yield can be increased.

III. Post-management

1. Keep the soil moist after the emergence of direct seeding, weed and loosen the soil regularly, water a small amount after finishing the seedlings, and hoe regularly so that the roots can be deeply rooted.

2. wait until the seedling height is about 6 centimeters, and when the seedling grows to about 10 centimeters, you can combine with ploughing and weeding, and fix the seedlings according to the plant distance of about 10 centimeters. When the seedling grows to about 16 centimeters, about 10 kilograms of ammonium nitrate and 20 kilograms of calcium phosphate are applied per mu.

3. In the process of weeding and topdressing, do not lose the stalk, which is easy to affect the yield, and ploughing and loosening the soil should be carried out before the rainy season to prevent lodging.

4. Before the tufted leaves are sealed, fertilization can be combined with ploughing. About 25 kg of compound fertilizer is applied per mu, and then shallow hoe is leveled and watered.

5. In case of drought, you can water it many times, but not too much, so as not to affect the quality.