Artemisia selengensis in summer propagation
Chrysanthemum, also known as Artemisia selengensis, is a perennial vegetable that is both nutritious and delicious. It has a unique flavor, crisp texture, and is rich in essential nutrients. Another related species, Artemisia sclerophyllum, is well-known for its ability to improve appetite, aid digestion, promote diuresis, and support detoxification. It is traditionally used to treat conditions such as stomach discomfort, qi deficiency, edema, and even acute infectious hepatitis. Its nutritional value is comparable to that of potatoes, and it plays an important role in liver protection by helping to store glycogen and assist in detoxification processes. Additionally, chrysanthemum contains aromatic oils that can be used as natural flavoring agents.
Summer is an ideal season for vegetative propagation of Artemisia selengensis. There are several effective methods available, offering flexibility in cultivation. After summer propagation, the plants can be used as a base for winter anti-seasonal production. One common method is cutting: during July and August, select healthy branches from robust plants, remove the top young shoots and the lower aged, lignified parts, and cut them into 15 cm sections. Retain 2–3 leaves at the top and make a slanted cut at the bottom. Plant the cuttings in shallow trenches about 10 cm deep, spacing them 3–4 cm apart. Press the soil firmly around the cuttings, ensuring they are covered up to about one-third of their length. Water thoroughly after planting, and water again after 1–2 days. Keep the soil consistently moist throughout the growing period.
Another propagation technique involves layering. In July and August, dig trenches 6–7 cm deep with a 45 cm spacing on the surface. Select healthy plants from the Artemisia ulmoides field, cut off the top 30 cm of tender growth, and place them in the trench, connecting the ends and covering with soil. Keep the soil moist, and roots will develop over time. By early March of the following year, new shoots will begin to emerge, and they can be transplanted by late March.
Rhizome propagation is also effective and can be done in summer or other seasons. Dig out rhizomes from the field, remove old parts, and use the new rhizomes as planting material. Place them in prepared trenches, cover with soil, water regularly, and maintain moisture. The recommended amount is about 150 kg per mu (approximately 667 square meters).
Field management is crucial for successful cultivation. Before planting, apply 3,000 kg of organic fertilizer per acre, or 50 kg of rapeseed cake and 25 kg of superphosphate as base fertilizer. When the plants reach 4–5 cm in height, side-dress with 20–30 kg of nitrogen fertilizer per acre. Apply another dose half a month later, and repeat after each harvest. In winter, spread a layer of river mud, and in the following year, apply a quick-release fertilizer monthly. Use 2,000 kg of human waste per acre, or 30 kg of ammonium bicarbonate and 25 kg of phosphate fertilizer.
Watering is essential, as wormwood thrives in moist conditions. Ensure the field remains consistently wet, and water frequently, especially after each top-dressing.
Weeding should be done several times before the plants grow large enough to shade the ground. When seedlings reach 5–10 cm in height, apply 3–4 grams of gibberellic acid per acre mixed with 12 kg of water and spray the foliage. This helps promote growth and improves yield. Wait one week before harvesting.
Harvesting should occur when the young leaves are 8–15 cm long, the heart leaves have not yet opened, and the stems show signs of lignification and a white-green color. Cut the plants close to the ground, remove only a few leaves from the stem, and wipe off the rest. Bundle them according to size, clean with water, and store in a cool, damp place. After 8–10 hours of softening, the product is ready for market.
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