1. Land selection and preparation

It is better to plant Angelica dahurica in sandy soil or alluvial soil with deep soil, loose and fertile soil, and good drainage. Apply 4,000 kilograms of manure or compost per acre as base fertilizer, and plow the soil to a depth of more than 30 centimeters. After drying, plow once more, level and rake finely, and then make a border with a width of 1 to 2 meters and a height of 20 centimeters. Water thoroughly before sowing.

2. Propagation method

Seed propagation can be sown from August to September. Dust off the newly harvested seeds, make trenches with a row spacing of 30 cm and a trench depth of 6 to 9 cm. Sprinkle the seeds evenly, then cover with soil and compact them. The seed amount per acre is 1 kg. Seedlings can emerge about 15 days after sowing. Autumn sowing has higher yield and better quality than spring sowing, so autumn sowing is generally used in production.

3. Field management

1. Thinning and weeding. When the seedlings are 3 to 6 centimeters tall, thin them out at a spacing of 8 to 10 centimeters to allow the seedlings to be ventilated and light-transmissive and grow robustly. When Angelica dahurica is 9 to 12 centimeters high, weeding should be combined to remove weak seedlings and the seedlings should be planted at a distance of about 24 centimeters between plants. When thinning and setting seedlings, it is required to keep the middle seedlings and remove large leggy seedlings and small thin seedlings to prevent early bolting or weak growth. Weeding during the seedling stage should not be done too deeply, otherwise it will damage the main root and easily produce forked roots, which will affect the quality. In the late growth period, it is necessary to till and loosen the soil once in conjunction with watering.

2. Fertilize and water. After thinning and stabilizing the seedlings, apply feces and urine once in combination with watering, and the application rate is 2,000 kilograms per mu. The soil should be kept moist throughout the growing period. Compact soil tends to produce lateral roots. In the late growth period, more phosphorus and potassium fertilizers should be applied, so that fertilization should be carried out according to the seedlings, less for good seedlings and more for weak seedlings. From July to August, top dressing with 0.2% potassium dihydrogen phosphate solution can increase yield.