Overwintering management of herbal medicines-- Panax notoginseng, Coptis chinensis, Morinda officinalis, Ligusticum chuanxiong

Panax notoginseng: when the leaves of the plant turn yellow and wither in winter, cut off the aboveground stems and leaves about 3 cm from the ground, collect the dead stems and leaves, root out weeds and diseased bodies inside and outside the garden, burn them all outside the garden to clean the countryside, and spray the border surface with 1: 1: 200 Bordeaux solution or 0.2: 0.3 Bomedo stone sulfur mixture to disinfect the soil completely. It is found that there is a root phenomenon, cultivate the soil properly. In addition, after clearing the garden in November, 2000 kg per mu of rotten mixed fertilizer was applied to the root of the plant to protect the bud safely through the winter. Before the seedlings are unearthed, repair the shade shed, and the shade should be adjusted to about 60%, so as to increase the sunlight in the garden and promote the growth and development of Panax notoginseng in the following year.

Coptis chinensis: Coptis chinensis in winter can promote the growth and development of Coptis chinensis seedlings, make its rhizome grow, increase the depth of root system accordingly, reduce or avoid the damage to root caused by low temperature freezing injury, avoid freezing damage to bud, and is beneficial to plant growth. When cultivating the soil, dig up the soil in the furrow, pound it into loose crushed soil, and spread it evenly on the border. Other herbs suitable for overwintering are Radix Astragali, Panax ginseng, Panax quinquefolium and so on.

Morinda officinalis: Morinda officinalis is a perennial evergreen woody vine, which is used in medicine with its root. After growing for 2 or 3 years, the root growth has entered a prosperous period. in order to prevent the excessive growth of its stems and leaves, the aged green stems can be cut off from the base in winter every year, combined with the preparation of cuttings, which can be used as a material for cutting propagation. reduce the consumption of nutrients by stems and promote the accumulation of nutrients to the roots, so as to achieve the purpose of safely overwintering and increasing yield. Other medicinal plants suitable for pruning and overwintering are forsythia, Chinese wolfberry, gardenia, honeysuckle, rose, gallnut, pepper and so on, but after pruning, weeding, fertilization and supplement of nutrients should be carried out to restore the normal growth of the plant as soon as possible.

Ligusticum chuanxiong: after the beginning of winter, when the aboveground part of Ligusticum chuanxiong is withered and yellow, the fourth time of ploughing and weeding should be carried out, first pulling off the aboveground part, and then ploughing and weeding, and the soil between rows should be choked up on the row to protect the rhizome through the winter. In addition, Codonopsis pilosula should also be given a "winter medicine" before the beginning of winter, and in the following spring, the withered stem weeds would be removed with a tooth hoe and burned with fire to make fertilizer.