Protected field planting is generally carried out in late March or April, with hotbeds: open field planting, hotbed sowing in mid-April, direct seeding in the open field, small arch shed or plastic film planting in early May, cold bed or open field sowing in batches, and the sowing period is 7- 10 day. Sowing method: depending on the planting method (direct seeding or transplanting seedlings), the sowing amount per hectare is 60-70 kg, the row spacing is about 10 cm, and the sowing amount per hectare is 30-37.5 kg. Cover the soil to raise seedlings to prevent sudden death. The best seedling age is 20~0 days, and the best planting time is 3~4 real leaves. Planting: It usually takes 5-7 days from sowing to germination. In the process of germination, water should be kept to prevent the soil from drying. When the seedling height is 2~3 cm and the true leaf 1~2, pull out the seedlings field by field, and keep the plant spacing at 1~2 cm. In shallow planting, when the seedlings are planted at the stage of 3-4 true leaves, the outdoor or indoor temperature of the planting should be stabilized at 65438 00℃, and the planting or planting interval should be 4-6 cm.
Wide adaptability, naturally like cold, not resistant to high temperature. The optimum growth temperature is 17~20℃, and the growth is slow below 12℃, and poor above 29℃, but it can tolerate short-term low temperature of 0℃, and the seeds can germinate above 17℃, and the germination is the fastest at 15~20℃. Lighting. Artemisia selengensis doesn't have strict requirements on light. Generally, it grows well in weak light, and its branches bloom in high temperature and short sunshine. Under the condition of long sunshine, nutrient growth is insufficient. Moisture. Artemisia selengensis has no strict requirements on water and fertilizer, as long as the soil is kept moist, but the water content should not be too much, otherwise it will affect the growth and development and reduce the yield. Soil. Artemisia selengensis has wide adaptability to soil, but loose and fertile slightly acidic sandy loam is the best. The optimum PH value is 5.5~6.8.
When watering the seedlings after they are unearthed, the time and frequency of watering should be flexibly controlled to keep the soil moist. Before harvest 10- 15 days, apply quick-acting nitrogen fertilizer once, and apply potassium nitrate 15 kg and urea 8 kg per mu. Pest control of Artemisia selengensis. Diseases and insect pests of Artemisia selengensis. Mainly controlled by agriculture. Fertilization and watering should be reasonable and avoid size. Temperature management is neither high nor low, creating a good ecological environment, promoting the healthy growth of plants, reducing the use of pests and pesticides, and maintaining ecological balance. The harvest of Artemisia selengensis generally grows for 40 to 50 days. When the plant is as high as 20 cm, 12~ 13 true leaves can be harvested. In order to keep the product fresh and tender, if the harvest is not timely and the temperature is high, the stems and leaves will age, the quality will deteriorate, or the internodes will lengthen and the moss will bloom. If you want to harvest many times, you can leave 2~3 cm at the base of the main stem with a knife and bundle the cut tender stems and leaves into a bundle of 0.5 kg for sale. Watering after cutting and harvesting after one month.