Cultivation techniques of Glycyrrhiza uralensis

● growth habit licorice, alias sweet grass root, red licorice, powder grass. Is a leguminous plant. It is used in medicine with root and rhizome. It has the effects of clearing heat and detoxification, moistening the lungs and relieving cough, tonifying the spleen and tonifying qi and regulating various drugs. Licorice grows mostly in the north temperate zone, in plains, mountains or river valleys at an altitude of 0,200 meters. The soil is mostly sandy. The pH of soil should be neutral or slightly alkaline. Like the ecological environment with sufficient light and large temperature difference between day and night. Licorice is suitable for planting in northwest, north and northeast of China. Field management of ● licorice 1. If the row spacing of seedling sowing is 30 cm, the plant spacing can be kept at 18.5 cm ~ 20 cm. two。 Irrigation licorice should always keep the soil moist before and after emergence to facilitate seedling emergence and seedling growth. Specific irrigation should depend on soil type and salinity: sandy non-saline-alkali or slightly saline-alkali soil can be irrigated after sowing; soil viscous weight or saline-alkali is heavier, so it should be watered before sowing, and the key to cultivating licorice is to protect seedlings. Generally, plants will not be watered after they grow up. 3. Intertillage weeding is generally carried out in the year of seedling emergence, especially in the seedling stage, licorice root begins to grow from the second year, weeds are difficult to compete with them, and there is no need for intertillage weeding. 4. It is necessary to apply sufficient base manure before fertilization and sowing, and barnyard manure is better. In the year of sowing, phosphate fertilizer can be applied in early spring and organic fertilizer per mu before freezing in winter. Licorice root has nodule, has the effect of nitrogen fixation, generally does not apply nitrogen fertilizer. 5. Diseases and insect pests and their control are prone to powdery mildew and rust in rainy seasons and red spiders in dry seasons, which can be sprayed with 1000 ~ 1500 times of dimethoate EC. ● harvesting and processing licorice roots must be deeply dug, can not be cut off or hurt the root bark, after digging out to remove the residual stem, soil, avoid washing, while fresh to separate the main root and lateral root, remove Reed head, hair, branch, sun to semi-dry, tied into a small hand, and then to the whole dry; can also be dug in spring before licorice stems and leaves unearthed, but the mining quality is better in autumn.