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.
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When and how to classify the seedlings of Panax notoginseng
The picking time of Panax notoginseng seedlings is generally from the first ten days of December to late January of the following year, and the root system and seed buds should be avoided. First-class seedlings: the weight of single plant is not less than 2.5 grams, the dormant buds are fat and strong, the root system grows well, and there is no disease and insect infection and mechanical damage. Second-class seedlings: the weight of single plant is between 1.25 and 2.5 grams, the dormant buds are fat and strong, the root system grows well, and there is no disease and insect infection and mechanical damage. Third-class seedlings: the weight of single plant is between 0.75g and 1.25g, the growth of dormant buds is general, the growth of root system is average, no
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Varieties and varieties of Panax notoginseng
Panax notoginseng: slightly spindle-shaped or cone-like, long 1~6cm, diameter l~4cm. The surface is grayish yellow (commonly known as "iron") or grayish brown (commonly known as "copper skin"), with intermittent longitudinal wrinkles and a few lenticels, with stem marks at the top and tumor-like protuberances around (commonly known as "lion's head"). There are branch root broken marks on the side. The quality is solid, and the leather is often separated from the wood after crushing. The cross section is grayish green, yellowish green or grayish white (commonly known as "iron bone"), with small brown resin spots on the skin. The breath is slight, the taste is bitter and then slightly sweet. Spring
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