Growth habits and planting techniques of Angelica dahurica

Angelica growth habits: like mild humid climate and sunny environment. Poor growth in shade. Angelica dahurica root deep, soil requirements of deep, loose, fertile, good drainage of sand folder. Breeding of angelica dahurica: propagation by seeds. 1. Selection and preparation of land: Angelica dahurica has deep taproot, and it is better to have deep soil layer, loose soil and fertile sandy soil. Apply manure or compost 3000 kg per mu, deeply plow 30-40 cm, and make high or flat beds 1.2-1.5 meters wide. 2. Seed propagation: When new seeds are sown in the same year, the germination rate of seeds in the next year is low. Spring and autumn can be sown, autumn sowing better than spring sowing growth. Generally, drill sowing is adopted. According to the row spacing of 30 cm and the shallow ditch with depth of 1-1.5 cm, the seeds are evenly sown into the ditch, slightly suppressed after covering the soil, so that the seeds are in close contact with the soil, watered, and the temperature is about 25℃. The amount of seed used per mu is about 1 kg. Angelica scientific planting technology: 1. Soil preparation Angelica dahurica roots into medicine, the main root is deep, it should be deep soil requirements, loose fertile, sunny, dry terrain, good drainage of sandy loam for the best. Deep ploughing soil about 30 cm, fine ploughing and fine harrowing, combined with soil preparation, topdressing farm manure 2000-2500 kg per mu as base fertilizer, then leveling and harrowing fine, with a width of 1.3 meters, making high ridges, deep drainage ditches around, the ridge surface into turtle back shape, in order to facilitate drainage. 2. Sowing Angelica dahurica has strict requirements on sowing time, and sowing in the middle and late September in normal climate. However, in warm climates, sowing time can be extended until the frost is over. Angelica dahurica is suitable for direct seeding. If it is transplanted, the main root will branch out and grow poorly. Generally, it will be planted in holes. Dig holes according to the row spacing of 30-35 cm, the plant spacing of 20-25 cm, the hole depth of 8-10 cm, and apply appropriate amount of fire ash and human excrement as base fertilizer. About 250-300 kg per mu. The seed amount per mu for hole seeding is about 750 g. It can also be seeded or broadcast. The row spacing is about 30 cm, the groove is 10 cm wide and 7-9 cm deep, and the seeds are evenly sown into the groove with fire ash. About 1 kg of seed per mu is required for drilling. After sowing, pour 1 time thin human and animal manure water immediately, cover with fire ash again, with no seed as degree. Then, cover the grass on the ridge surface to keep moisture and prevent weeds. In case of dry weather, water once to keep the soil moist, and germinate after 15-20 days. II. Field management techniques 1, intertillage weeding, thinning seedlings Angelica dahurica seedlings, seedlings up to 5 cm or so, should start thinning seedlings. The first thinning: 5-6 seedlings per hole for hole sowing; 1 seedling for every 3-5 cm for drilling. When the seedling height reaches about 10 cm, it must be thinned for the second time; 3-4 seedlings are reserved for each hole of hole sowing, and 1 seedling is reserved for every 7-9 cm of drilling sowing. The last thinning is done every three times in late February of the following year, i.e., 3 seedlings are fixed in each hole for hole sowing, and 1 seedling is fixed every 10-15 cm (i.e., plant cabinet) for drill sowing. Should press "pull out big leave small" principle to decide seedling, avoid angelica dahurica grows too flourishing early blossom, affect its yield seriously. At the same time, after each thinning, the intertillage and weeding are carried out once.