(1) likes cold climate, but it has a wide range of temperature adaptation.
Artemisia selengensis began to germinate at the daily average temperature of about 4.5 degrees Celsius, and the most suitable temperature for the growth of tender stems was 12-18 degrees Celsius, and the lignification speed of stems accelerated above 20 degrees Celsius. In Nanjing, wild Artemisia argyi in the open field generally began to germinate in mid-February, and its vegetative growth was obviously accelerated from early April to late April, which was the peak time for the listing of wild Artemisia argyi in the open field. Artemisia selengensis is a long-day crop. Its flower buds differentiate in early July, and it starts bolting in late July. It blooms in the middle and late September, and bears fruit in 10. Its seeds are oval achenes. 1In mid-February, the above-ground parts died after encountering heavy frost. The rhizomes in the underground part have strong cold tolerance and can overwinter in the open field. Artemisia selengensis in the process of growth and development, as long as the temperature is appropriate. It can grow all year round without obvious dormancy period.
(2) Like to be wet and tolerant of fertilizer. It can grow in both dry land and shallow water. Roots are drought-tolerant, under the conditions of high temperature and drought in summer. Not easy to die. But the plants are not growing well.
(3) It is a strong light crop with insufficient light and weak growth.
(4) It is suitable for growing on alluvial sandy loam, and continuous cropping is forbidden. Continuous cropping for more than three years, the growth is not prosperous, and the disease is serious.
Key points of cultivation techniques
The yield composition of Artemisia selengensis in summer and autumn is different from that of Artemisia selengensis in winter and spring. The development quantity and nutrient accumulation degree of underground rhizomes are the basis of Artemisia selengensis yield in winter and spring. Through the germination of underground rhizomes, the sprouted tender stems are picked and put on the market. In summer and autumn, Artemisia selengensis is planted with new seedlings, properly planted closely, and formed a strong new root system through high fertilizer and strong light. Promote the sprouting of new branches in the axils of some leaves above ground, and pick tender heads for listing.
(1) Preparation before land selection and valuation
Wet and fertile alluvial sandy soil is the best, and continuous cropping is forbidden. Digging, sun-drying, applying 80-00 loads of organic fertilizer per mu, and adding 50-1 100g of root promoter, or applying special mixture of reed pole100 kg, and planting in flat border. It is best to spread sulfur powder 10- 15 kg per mu in the continuous cropping land to prevent diseases.
(2) seed selection
Choosing Artemisia scoparia or Daphne macrophylla as cultivation species not only has high yield, but also has good commercialization.
(3) Planting
The fixed value period is from April to August. It was planted in April and listed on June 6 and 7. It was planted in May and listed in July and August. It was planted in June and listed on August and September. It was planted in July and listed in September and October. It was planted in August and listed from 10 to1February. In April and May, the planting method was adopted. 6. When the value is fixed in August. Choose a stout plant and cut it off on the flat ground, and cut off the soft top. Part and aging part of the base, take the middle semi-lignified stem, cut it into 20cm long segments, soak it in 1% pesticide solution for 30min, kill the borers in the stem, and then plant 4-5 plants per hole according to the row spacing 1 ft and the plant spacing of 5 inches, and plant 50,000-60,000 plants per mu, tread tightly, and pour water.