How does Angelica grow scientifically?

How does Angelica grow scientifically? Please give an introduction to Angelica sinensis planting can refer to the following methods: 1, land selection, soil preparation: choose a south-to-north half-shady and half-sunny slope, requiring loose soil and good structure. Lesser Fullness of Grain turned deeply in front of him once and broke the clod as a seedbed. The bed was 1 meter wide and the length varied with the terrain. The drainage ditch between the bed and the bed is 30 cm wide and 15 cm deep. The planting land should be deeply ploughed and fine raked, with a base fertilizer of 2500-5000 kg per mu and turned evenly with the same soil as a high border, with a width of 1.2 to 1.5 meters. The drainage ditch between the borders is 30 cm wide and 20 cm deep. 2. The mode of propagation: seedling raising and transplanting are often used in production. The sowing date should be determined according to the altitude and air temperature, about July in Gansu, Sichuan and Yunnan, and about August in Shaanxi. Sowing method is sowing, seeds mixed with ash scattered on the border, slightly suppressed, covered with a small amount of fine wet soil, covered with grass, to achieve light transmission, moisturizing, seedling age of no more than 110 days, sowing amount of 40.5 kg per mu. Transplanting is divided into winter planting and spring planting, and the row spacing is 25 cm × 25 cm. Spring planting before and after the Qingming Festival, winter planting is suitable for transplanting after Cold Dew and before Frosts Descent. The seed direct seeding method can be used in winter, spring and autumn, and the early bolting of Angelica sinensis can be controlled, in which winter direct seeding is better, but the yield is not high. 3. Field management (1) Seedling stage management: the soil must be kept moist after sowing to facilitate seed germination. About 40 days to pick loose cover grass, when the seedling height is about 3 cm, loosen the soil once, immediately pull out the weeds, after the summer day, choose a cloudy day to remove all the cover grass. Pay attention to drought prevention and drainage at seedling stage. (2) Seedling storage: Cold Dew to Frosts Descent, when the temperature drops to about 5 ℃, when the leaves begin to wither, dig up the seedlings, tie up some soil into small handfuls, dry them and remove water for cellar or heap storage. Seedlings are too old to be stored in piles. When storing, pay attention to placing them facing outward and roots inward. (3) Seedling between seedlings: under normal circumstances, after the seedlings come out about 20 days after transplanting, the seedlings should be replenished with small seedlings with soil in overcast and rainy days. The seedlings were fixed about 3 months after planting, and the diseased seedlings and weak seedlings were removed, and 1 plant was retained in each hole. (4) weeding in the middle of ploughing: in the middle of May, weeding should be carried out for the first time, it is appropriate to hoe shallowly and do not bury seedlings in the soil. In the middle of June, the second time of weeding, deep hoe can be used to promote root development. (5) bolting: after transplanting, the plants that blossom and bear fruit in the same year are called early bolting, and the roots can not be used medicinally, so they should be completely removed. (6) topdressing: Angelica sinensis is a fertilizer-loving plant, and phosphorus, potassium and ammonia fertilizer should be applied during the leaf peak period in late June and the root growth period in early August. Click to get more Angelica planting technology click to get more medicinal material planting technology