Polygonatum odoratum seed prices and planting methods explained in detail
Polygonatum odoratum, also known as Di Guan Zi, Wei Shen, Ling Dang Cai and so on, is a perennial herbaceous plant of the genus Polygonatum in the Liliaceae family. It originated in southwestern China, but is widely distributed in the wild. Its rhizome is used as medicine and has effects such as nourishing yin and moistening dryness, clearing heat and relieving cough, and can also be used as a premium tonic food, delicacy and beverage. It is worth planting for farmers. Let us take a look at Polygonatum odoratum seed prices and planting methods below!
How much does a jin of Polygonatum odoratum seeds cost?
The price of Polygonatum odoratum seeds is about 80 to 110 yuan per jin, but it varies depending on seed quality, variety, place of origin and market. Wild Polygonatum odoratum mostly grows in cool, moist mountain open forests or thickets without standing water. It is cold-resistant and tolerant of shade and moisture, and avoids direct strong light and much wind. It prefers deep soil rich in sand and humus. In production, underground rhizomes are mostly used for propagation. Generally, 400 to 600 jin of seed rhizomes are used per mu, and the yield of dried goods is about 1200 to 1500 jin per mu.
Sowing methods for Polygonatum odoratum
1. Site selection and land preparation: For planting Polygonatum odoratum, it is advisable to choose slightly acidic sandy loam with deep soil layers, good drainage and a sunny aspect, plow more than 30 cm deep, and at the same time apply 3000 to 4000 kg of farmyard manure per mu as base fertilizer, break the soil up finely and level it, and make high beds 1.3 cm wide.
2. Seed rhizome selection: When Polygonatum odoratum is harvested in autumn, select plump, yellow-white root buds grown in the current year and keep them for seed use. Dig, select and plant them as you go. If weather changes prevent planting, the root buds must be spread out in a wind-protected, cool indoor place.
3. Seed germination promotion: Before germination treatment of Polygonatum odoratum, first soak the seeds in cold water for 24 hours, remove them and drain the water, then fully mix the seeds with wet sand at a 1:3 volume ratio for germination promotion. Turn the seeds once every 10 days, and after 30 days take them out and sow them in the field.
4. Planting method: Plant Polygonatum odoratum from early October to late October. Open furrows 15 cm deep on the bed at a row spacing of 30 cm, place the seed rhizomes flat in the furrows at a plant spacing of about 15 cm, then cover with decomposed manure, and then cover with a layer of fine soil until level with the bed surface.
Planting methods for Polygonatum odoratum
1. Pre-emergence management: After sowing Polygonatum odoratum and before emergence, frequently check the bed covering to keep the bed soil constantly moist. Remove the covering at emergence, frequently check the soil moisture condition of the bed, water in time during drought, and do drainage work well before the rainy season.
2. Thinning and intertillage: When Polygonatum odoratum seedlings are 8 to 10 cm tall, properly thin them if they are too dense, and at the same time do weed control well. Pull weeds as soon as they appear. Never use a hoe, so as not to damage the rhizomes. When the soil is dry, pull them by hand. After rain or when the soil is too wet, it is not suitable to pull weeds.
3. Reasonable topdressing: Topdressing for Polygonatum odoratum should be determined according to the number of seedling years. If seedlings are transplanted after one year of raising, no topdressing is needed when sufficient base fertilizer has been applied. For seedlings transplanted after two years of raising, after the aboveground plants of the one-year-old plants wither, in late autumn and early winter after freezing, apply a layer of decomposed farmyard manure at 2000 kg per mu.
4. Irrigation and drainage: During the seedling growth period of Polygonatum odoratum, the seedlings are small and the roots are shallow in the soil, so they are not tolerant of drought. In case of drought, water in time. However, Polygonatum odoratum also most dislikes standing water. Before the rainy season arrives, dredge the bed furrows to facilitate drainage.
5. Winter cold protection: After the one-year-old seedlings of Polygonatum odoratum wither and before freezing, apply cold protection materials, covering with leaves, grass or manure soil, to ensure the seedlings overwinter safely.
Pest and disease control of Polygonatum odoratum
1. Leaf spot disease
[Harm] It damages leaves. First, oval or irregular lesions with purple-red edges and brown centers appear from the leaf tips, gradually spreading downward from the lesions, causing the leaves to become pale white and die. It mostly begins in summer and autumn, and is more serious in the rainy season.
[Control] After harvest, clean the field sanitation in time, collect dead branches and diseased residues and burn them centrally to eliminate overwintering pathogens in the field. Before onset and in the early stage of onset, spray 1:1:120 Bordeaux mixture, or 50% Tuzet 1000-fold solution, once every 10 days, for 2 to 3 consecutive times.
2. Root rot
[Harm] In the early stage of rhizome disease, light brown round lesions appear, after which the diseased part rots, the tissue separates and sinks, and in severe cases the lesions connect into large patches, affecting the yield and quality of Polygonatum odoratum. In old cultivation areas of Guangdong, there is a trend of worsening year by year.
[Control] Implement crop rotation, and never plant continuously on the same land. In the early stage of disease, apply chemicals in time to irrigate the roots. You can choose 50% carbendazim 500-fold solution, or 20% Shuangxiaoling aqueous solution 200-fold, or 50% Tuzet 800-fold solution.
3. Gray leaf spot
[Harm] It damages leaves. In the early stage of diseased plants, slightly round lesions with purple edges and gray centers form on the leaf surface, and at the same time strip-shaped spots can form along the leaf veins. In severe cases, the entire leaf dies. It mostly occurs from June to July.
[Control] In the early stage of disease, spray chlorothalonil 500-fold solution, once every 5 to 7 days, for 2 to 3 consecutive sprays.
4. Purple ring disease
[Harm] It damages leaves. Lesions occur on both sides of the leaves, round to oval, initially red, with the central part gradually turning gray to gray-brown, on which black small dots form, namely the pycnidia of the pathogen.
[Control] Do field sanitation well. After the seedlings emerge completely, spray with 70% thiophanate-methyl 800 to 1000-fold solution, 50% mancozeb 600-fold solution, or 50% Tuzet 800-fold solution and other agents, once every 10 days, for 3 consecutive sprays.
5. White grubs
[Harm] Adult white grubs appear in mid-May and are active in the evening. They like to lay eggs on undecomposed barnyard manure, and the eggs are laid scattered in relatively moist soil.
[Control] In winter, clear weeds, plow the land deeply, and destroy overwintering sites. When making beds, apply 25 to 30 kg of lime per mu on the soil surface and then plow it in to kill larvae. You can also use 90% crystal trichlorfon 1000 to 1500-fold solution to pour and irrigate the soil around the roots.