Planting conditions of Panax Notoginseng

Panax notoginseng belongs to shade-loving plants. Love warm winter and cool summer environment, fear cold and hot. Like wet but afraid of water, soil moisture content of 22%~40% is appropriate. It can grow under the planting environment conditions such as summer temperature not exceeding 35℃, winter temperature not lower than minus 5℃, temperature 18~25℃, etc.

Sanqi is not strict with soil requirements, and has a wide range of adaptability, but it is better to use sandy loam with loose soil and good drainage. Where too sticky, sand and low-lying areas prone to ponding should not be planted. Avoid continuous cropping, soil pH 4.5~8.

The annual panax notoginseng has only one palmate compound leaf. The biennial has 2-3 palmate compound leaves, each composed of 5 - 7 leaflets, and begins to bolt and bloom. Three or four years old cattle notoginseng generally born 3~5 palmate compound leaves, each mostly composed of 7 leaflets, a few as many as 9 leaflets. The number of compound leaves of Panax notoginseng over five years old can reach 6. The number of palmate compound leaves in each year is affected by growth and development conditions, nutrition is sufficient, development conditions are suitable, and the number of palmate compound leaves is large.

Each year Sanqi, in the production area is 2-3 months emergence, emergence period 10 - 15 days. After sprouting, Panax notoginseng enters the leaf expansion stage. At the initial stage of leaf expansion, the stem and leaf grow rapidly, usually reaching 2/3 of the normal plant height in 15~20 days. After that, the stem and leaf grow slowly, and grow out at one time with germination and emergence. Once the formed spore grows out, the stem and leaf are damaged, and there is no seedling on the ground.

Panax notoginseng is sensitive to light, likes oblique, scattered, diffuse light, avoid strong light. Generally, 30% transmittance is appropriate. Light is too weak, plants are long, leaves are soft, taproot growth is slow, easy to get sick. The light is too strong, the plant is short, and the leaves are easy to burn.

The seeds of Panax notoginseng have post-ripening property, which can complete physiological post-ripening and germinate under moist condition. The optimum temperature for seed germination is about 20℃. Seed life under natural conditions is about 15 days, seeds once dried on the loss of vitality, therefore, it is appropriate to harvest with sowing, or stratification treatment.