Cultivation techniques of Spring sowing Radix Isatidis

At present, the traditional Chinese medicine Radix Isatidis is promising in the market, and now it is almost time for the spring sowing season of Radix Isatidis, so how to cultivate Radix Isatidis in spring?

1. Land selection and land preparation. Radix Isatidis is a kind of deep-rooted plant, the main root can be up to 40-50 cm long, so we should choose fertile sand soil with deep soil layer and good drainage. Before sowing, the land can be turned 20-30 cm deep, and the sandy land can be slightly shallower, with sufficient base fertilizer, which is mainly farm manure, and then break the soil clods and rake flat to make beds. In the south, high beds are mainly used to facilitate drainage. Generally, the border is 1.5-2 meters wide and 20 cm high. 2. Sowing seeds. Radix Isatidis should be sown from March to April. When sowing, first draw a shallow trench with a depth of about 2 cm on the border surface according to the row spacing of 20-25 cm, then spread the seeds evenly into the ditch, cover about 1 cm of soil, and water properly in case of slight suppression and drought. When the temperature is suitable, seedlings can emerge 7-10 days after sowing, and the seed consumption is 1.5-2 kg per mu. 3. Field management. When the seedling height is 7-10 cm, it should be combined with intermediate tillage, weeding and time seedlings, and finally determine the seedlings according to the plant spacing of 6-8 cm. After fixing the seedlings, according to the growth of the plant, appropriate pursuit of human feces and urine or chemical fertilizer, plain watery areas or rainy season, should be surrounded by deep ditches to facilitate timely drainage and avoid rotting roots. In case of summer drought, you can water it in the morning or evening, and you must not be exposed to the sun. 4. Harvesting and processing spring sowing Radix Isatidis, the leaves can be harvested 2-3 times, the first time in mid-June, when the seedling height is 20 cm, leaving stubble 2-3 cm to facilitate the hair of new leaves; the second time is carried out in late August, the summer high temperature season is not suitable to harvest, so as not to cause death. The harvested leaves are dried in the sun, that is, Daqing leaves are used in proprietary medicine. It is better to have large, less broken, clean, dark green leaves and no mildew. Banlangen should be dug on a sunny day before the beginning of winter, and be sure to dig deep to prevent the root from being broken. After lifting the soil, clean the soil and stems and leaves, spread it to 70% to 80% dry, tie it into small bundles, and then dry it and sell it on the market.