High-efficiency cultivation technology for high-quality liquorice

Abstract

The invention discloses a high-efficiency cultivation technology for high-quality liquorice, which comprises the following steps: Ural licorice which is suitable for growing in a semiarid region is used as a cultivated variety; sandy loam with a deep soil layer is selected, deeply dug, finely raked, fertilized and furrowed; seeds are soaked by mild water, sowed and cultivated into seedlings and the seedlings are transplanted between grain rain and grain in ear in the second year; the liquorice seedings are applied by base fertilizer, cultivated and weeded; the plants recovered from the transplanting after being transplanted for two or three years are applied by farmyard manure, ordinary superphosphate and potassium sulphate and watered if the soil moisture content is bad; and after being transplanted for 3 to 4 years, the plants are harvested by a herbal medicine digger from the last third of September to the beginning of October. The liquorice cultivated by the technology has high content of active ingredients and has acid content of 2.5-3.3 percent, which is increased by 20 percent to 45 percent compared with the acid content of the liquorice of general cultivation, the liquorice conforms to the quality requirement of the liquorice exported to Japan, the liquorice exported to Japan is twice the purchasing price of the liquorice in China, and the liquorice which grows three years after being transplanted has stable output from 500 to 600 kg and has higher economic benefit.

Description

technical field [0001] The invention relates to a cultivation technique of traditional Chinese medicine, in particular to a cultivation technique for increasing the effective components of licorice. Background technique [0002] Licorice is a perennial leguminous plant Glycyrrhiza uralensis Fisch. Its roots and rhizomes are used as medicine. It has the functions of clearing away heat and detoxification, moistening the lungs and relieving cough, and reconciling various medicines. Roasted licorice has the effect of invigorating the spleen and replenishing qi. Licorice is an excellent windbreak and sand-fixing plant in arid and semi-arid desert areas. Excavating licorice will cause great damage to vegetation. The developed countries in the world have long banned the mining of wild licorice. my country has also adopted strict management measures in recent years. Therefore, the current contradiction between supply and demand of licorice is very prominent Therefore, artificial cul...

AI Technical Summary

Problems solved by technology

[0003] The content of glycyrrhizic acid and liquiritin in wild licorice is about 4.5% and 2% respectively (Zheng Ali, Sun Lan, etc.). At present, the licorice cultivation technology with a yield of 300-500kg per mu after planting for 3 years has been popularized and applied, but such conventional cultivation technology , the average content of glycyrrhizic acid in the cultivated licorice is less than 2%, and the content of glycyrrhizin is mostly less than 1%, which makes the quality of licorice poor and does not meet the requirements of the "Pharmacopoeia of the People's Republic of China" standard and export, the price is low, and the economic benefit is difficult to improve. People are not very enthusiastic about cultivating licorice. Therefore, research on licorice cultivation techniques tends to focus on high-quality and stable yield or high-quality and high-yield cultivation techniques.

[0004] At present, Zhang Yan and others have studied the effect of nitrogen fertilizer on the growth and active components of Ural Glycyrrhiza, and the results show that increasing the level of nitrogen fertilization has different degrees of promotion on the content of glycyrrhizic acid; the reported literature is limited to a single measure to improve the yield and quality of Glycyrrhizae For the effect of active ingredients in licorice, so far there is no research on comprehensive cultivation measures to increase the content of glycyrrhizic acid or liquiritin