Growth environment of Panax notoginseng

Panax notoginseng belongs to shade-loving plants. Likes warm winter and cool summer environment, afraid of cold and hot; likes humidity but afraid of ponding, soil moisture content of 22%~40% is appropriate. Summer temperature does not exceed 35℃, winter temperature is not lower than minus 5℃, can grow, suitable temperature for growth 18~25℃. 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.

One year old panax notoginseng has only one palmate compound leaf; two years old has 2-3 palmate compound leaves, each composed of 5 - 7 leaflets, and begins to bolt and bloom; three or four years old panax notoginseng generally has 3 - 5 palmate compound leaves, most of which are composed of 7 leaflets, and a few have 9 leaflets. The number of compound leaves of Panax notoginseng over five years old can reach 6. Many palmate compound leaves of each year

Less affected by growth and development conditions, adequate nutrition, suitable development conditions, more palmate compound leaves.

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 too weak, plant excessive growth, soft leaves, taproot growth slow, easy to get sick; light too strong, plant short, leaves 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.