Houttuynia cordata and Andrographis paniculata are widely used traditional Chinese medicines and are one of the first choice antiviral drugs. At present, there are more than 30 kinds of Chinese patent medicines on the market that use the raw materials of the original two flavors, so the society needs more. And its easy planting, quick results, there is a certain degree of development prospects.
Houttuynia cultivation
Houttuynia is a perennial herb suitable for planting south of the Yangtze River. The whole plant has a special odor.
Habits: Hi and moist, born in the field ridge, the ditch and the back of the mountains in the grass, can also be found.
Selection of land: It is better to use fertile sandy soil and humus soil.
Cultivation and breeding: There are two methods. The first is the propagation of rhizomes: In the middle and early March, the rhizomes were excavated before the plants sprouted new seedlings. Cut into small pieces that are 10-12 inches long. Each piece must have 2-3 knots and leave fibrous roots. According to the row spacing of 30?, open a shallow trench of 3-4.5? depth, cut the rhizomes, put 15 to 15 rows of planting distance, cover soil 6-10?, after a little suppression, watering, in order to keep the soil moist , 20 days after emergence. The second is cutting propagation: in the summer high temperature season, cut in the open seedbed. Select the thicker above-ground stalks to cut into cuttings with 3-4 sections. Two sections are inserted into the earth.
Management: After plugging in, properly construct shade and keep the relative humidity above 90%. After the cuttings have taken root and new leaves have been grown, the awnings can be gradually removed and transplanted to Daejeon 10-15 days later. Field management is easy. Houttuynia does not tolerate drought, and it is required to keep the soil moist during the growing season. Pay attention to topdressing. Houttuynia has less pests and diseases. In order to avoid damage to the root seedlings, it is no longer possible to loosen the soil, but weeds must be removed.
Harvesting: Houttuynia cordata should be harvested in summer and autumn with lush stems and leaves, and harvested when the odor and odor are strong (the active components containing volatile oil such as decanoyl aldehyde and lauric aldehyde are high). Remove the dirt, dry it, and tie it in small pieces.
Planting of Andrographis paniculata
Andrographis is a one-year-old herbaceous plant. The whole plant tastes extremely bitter and is suitable for cultivation in southern provinces.
Habits: It is a plant that is "Four Happiness and Afraid", that is, hi, warm, hi moist, hi sun, hi fertilizer, fear of drought.
Selection of land: For nursery and planting areas, sandy soils with flat terrain, sunny leewards, convenient drainage and irrigation, and loose and fertile soils should be selected. Andrographis paniculata is not suitable for planting in arid and alkaline soils.
Cultivation: Propagation of Andrographis paniculata is propagated with seeds. The suitable temperature for seed germination is 25-30°C. Below 20°C, the germination potential is significantly reduced. Below 15°C, no germination is possible. Seed sowing in February and March will take about one month to basically produce seedlings. When the temperature was around 20°C in April, the plants began to grow. The growth period is 150-200 days. Diseases mainly include damping-off, blight, blight and black stem diseases.
Harvesting: Andrographis sown one time can be continuously harvested. Generally grasped in the non-flowering or early bud harvest (the highest total content of Andrographis). Shoot seeds, the whole bar bundled into a bundle, that is, Andrographis medicine. Harvested twice a year, harvested at the beginning of the first time around August, and this harvest should retain 2-3 branches. After harvesting, weeding, ripping, fertilizing and watering were continued to re-emergence, and we harvested the second time in November. After the harvest, the old seedlings are managed well for the winter. In the following spring, weeding, earth-cultivation, and fertilization will be continued to grow them.
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