The sowing date of Angelica dahurica is divided into spring and autumn. Spring sowing is around Tomb-Sweeping Day, but it is generally not used because of its low yield and poor quality. Autumn sowing should not be too early or too late, nor should it be earlier than summer sowing; Otherwise, it will grow rapidly in the winter of that year, and most plants will bolt and bloom in the second year, and their roots cannot be used as medicine, but not later than the autumn equinox; Since the rainfall gradually decreases and the temperature turns low after the autumnal equinox, Angelica dahurica can't germinate for a long time after sowing, which affects the growth and yield, so it should be sown in early August and early September. Sowing method: Angelica dahurica is suitable for direct seeding, but not for seedling raising and transplanting. The root system of transplanted plants is bifurcated, which affects the yield and quality. Using hole sowing and drilling. Before sowing, fill the border with water, and start sowing after the water seeps out. Before sowing, seeds should be removed mechanically, then soaked in warm water (45℃) for 6 hours, taken out and dried before sowing. Hole sowing, the row spacing is about 33 cm, the plant spacing is 16 ~ 20 cm, and the hole depth is 6- 10 cm. After sowing, the soil is usually kept moist by watering, sprinkling water or covering grass. Emerge 0-20 days after sowing. Angelica dahurica planted in autumn has large taproots and high yield. The row spacing is 33 cm, and the seeds are evenly sown with fine soil. The sowing amount is more than 0/5 kg per hectare/kloc-,which is the same as other sowing in the same hole. 3. Intercropping: In order to use the land economically, it can also be intercropped in Angelica dahurica. In principle, short crops are better. After sowing angelica dahurica and vegetables, such as kudzu vine buds, spinach and garlic seedlings. It must be harvested before the spring to facilitate the growth of white awn, with spinach and garlic seedlings as the most. Drill spinach between rows and plant garlic seedlings every 3 cm. Four ... The sowing date of Angelica dahurica is divided into spring and autumn. Spring sowing is around Tomb-Sweeping Day, but it is generally not used because of its low yield and poor quality. Autumn sowing should not be too early or too late, nor should it be earlier than summer sowing; Otherwise, it will grow rapidly in the winter of that year, and most plants will bolt and bloom in the second year, and their roots cannot be used as medicine, but not later than the autumn equinox; Since the rainfall gradually decreases and the temperature turns low after the autumnal equinox, Angelica dahurica can't germinate for a long time after sowing, which affects the growth and yield, so it should be sown in early August and early September. Sowing method: Angelica dahurica is suitable for direct seeding, but not for seedling raising and transplanting. The root system of transplanted plants is bifurcated, which affects the yield and quality. Using hole sowing and drilling. Before sowing, fill the border with water, and start sowing after the water seeps out. Before sowing, seeds should be removed mechanically, then soaked in warm water (45℃) for 6 hours, taken out and dried before sowing. Hole sowing, the row spacing is about 33 cm, the plant spacing is 16 ~ 20 cm, and the hole depth is 6- 10 cm. After sowing, the soil is usually kept moist by watering, sprinkling water or covering grass. Emerge 0-20 days after sowing. Angelica dahurica planted in autumn has large taproots and high yield. The row spacing is 33 cm, and the seeds are evenly sown with fine soil. The sowing amount is more than 0/5 kg per hectare/kloc-,which is the same as other sowing in the same hole. 3. Intercropping: In order to use the land economically, it can also be intercropped in Angelica dahurica. In principle, short crops are better. After sowing angelica dahurica and vegetables, such as kudzu vine buds, spinach and garlic seedlings. It must be harvested before the spring to facilitate the growth of white awn, with spinach and garlic seedlings as the most. Drill spinach between rows and plant garlic seedlings every 3 cm. 4. Field management (1) Watering: It is not necessary to water where there is sufficient rain, but in arid and semi-arid areas, deep water must be dug before sowing, and soil moisture must be preserved. In case of drought or prolonged drought, water must be watered after sowing. If the soil moisture is not good, you have to water it and it will germinate after about 4 times. Always keep the soil moist in the future to facilitate the growth of seedlings. Water before light snow to prevent angelica dahurica from dying in winter. The following spring, water before and after Qingming Festival, not too early, the ground temperature is low, and Shui Han seedlings refuse to grow. Water once every 65,438+00 days in the future and once every 5 days in summer, especially before the arrival of Miscanthus in Grain Rain. If the taproot cannot extend downward, the fibrous root will affect the yield. Keep enough water in summer, and don't make the seedlings droop and dwarf because of lack of water; Otherwise, the lignification of taproot will reduce the quality. (2) Intercropping: When the seedlings turn green in spring, when the height is 6 cm, intercrop the seedlings, and select the weak seedlings appropriately, so that the seedlings are evenly distributed and ventilated. Sow when the seedling height is 13 ~ 16 cm, and leave seedlings per hole 1 ~ 2 plants, and 16 cm drilling technology leaves seedlings 1 plant. Choose seedlings with blue and white stems to reduce the appearance of Radix Angelicae Dahuricae in the future, and keep the seedlings neat and consistent in short. (3) intertillage weeding: intertillage weeding should be carried out every time, and weeding should be done by hand when the height of the first seedling is 3 cm; After the soil is hardened, loosen the soil shallowly about 3 cm, not too deep, otherwise the main root is not deep, and there will be many fork roots, which will affect the quality. The second time, when the seedling height is 6 ~ 10 cm, the weeding is slightly deeper. When the seedlings are fixed for the third time, weeds should be thoroughly removed by loosening the soil and weeding. After that, the plants grow up and collect ridges, so it is impossible to carry out intertillage weeding. (4) Top dressing: Top dressing of Angelica dahurica should be light in the current year, so as to prevent the plants from growing white and flowering ahead of time. Sowing in the second year, topdressing 1-2 times before closing the ridge, combined with thinning and intertillage. The top dressing amount of cake fertilizer per hectare is 2250-3000 grams, and it can also be replaced by chemical fertilizer and human and animal manure and applied to shallow ditches. Spraying phosphate fertilizer outside roots after rainy season also has significant effect.