Where is the latest origin of Tongcao?

Tongcao alias Cote, from the south, live, rely on merchants, flowers and plants, for Araliaceae green shrubs or small Arbor peeling stem pulp, with heat-clearing diuresis, ventilated under the effect of milk, the main treatment of dampness and warm urine red, gonorrhea astringent pain, edema, less urine, milk and other diseases, let's take a look at the origin of Tongcao!

Where is the origin of Tongcao?

The producing areas of Aristolochia manshuriensis are distributed in the southwest and Shaanxi, Jiangsu, Anhui, Zhejiang, Jiangxi, Fujian, Taiwan, Hubei, Hunan, Guangdong, Guangxi and other places. At present, the Chinese market is mainly replaced by Akebia manshuriensis, Akebia trifoliata and Akebia trifoliata. Akebia quinquefolium and Akebia trifoliata are used in Japan, and Aristolochia manshuriensis and Aristolochia manshuriensis are used in Taiwan market, and Aristolochia manshuriensis was once used in the mainland, but it was banned because of toxicity.

The producing area environment of Tongcao

Tongcao is born in sunny and thick soil at an altitude of 10m to 2800m, or cultivated in a garden, likes light and warmth, grows well on moist and fertile soil, has strong lateral growth of roots, and can form a large number of root tillers, not very hardy, and the overwintering temperature is above 5 ℃. It is suitable for fertile sandy loam cultivation, strong vitality and can be derived by itself, but deciduous leaves should be shed in winter. It is appropriate to plant under the big trees on both sides of the highway and on the edge of the garden, which can suppress the growth of weeds and reduce soil erosion.

Cultivation techniques of Tongcao

1. Land selection and land preparation: grass cultivation land should choose miscellaneous wood forest with convenient irrigation and good drainage, secondary forest mountain valley, gentle slope, slope not more than 10-15 degrees, fertile brown forest soil, sandy soil, soil preparation before sowing.

2. Propagation techniques: grass is propagated with seeds, and the suitable planting time is from April to October. In cloudy and rainy days or sunny afternoons, when the sun is deflected, the row spacing is 20: 25 cm. The plant spacing can be determined according to the fertility of the soil, the thickness of management, and the difficulty of drainage and irrigation. The seed sowing in the ditch can be suppressed by covering 2 cm of soil.

3. Field management: keep the soil moist after sowing, and pay attention to drainage during the seedling growth period. Seedling height of more than 30 cm should be tower support vine, take artificial frame can be a variety of branches into a fence support, can use small trees or shrubs, such as Vitex mandshurica, edamame beans and so on. Farm manure was applied 2 or 3 times a year during the growing period.

4. Pest control: there are few diseases during the growth period, mainly insect pests. Aristolochia mandshurica larvae bite leaves and stems from July to September and are sprayed with 500-800 times of 90% trichlorfon. Aphids are harmful to leaves and are sprayed with 2000 times of dimethoate emulsion.

5. Harvest and leave seeds: cut the base of the grass in autumn and winter, remove the head, tail and young branches, scrape off the rough skin of the wooden column, dry it, straighten the rattan stem in the drying process, tie it up according to the diameter and thickness, and then continue to dry. Leave seeds to select large, full, pest-free seeds.