Chrysanthemum has a short growing period and can be harvested 40-50 days after sowing. Generally, it is planted in early December, so that the listing period is ahead of the Spring Festival, and it is easy to obtain better economic benefits. Artemisia selengensis has strong adaptability and is rarely endangered by pests and diseases. Its cultivation and management are simple and it is very suitable for greenhouse production in the deep winter season. It is an ideal species for the production of leafy vegetables in greenhouses in winter. Below, introduce its cultivation techniques as follows.
I. Variety selection
In the northern region, lobular wormwood is commonly selected, also known as wormwood or wormwood. The leaves are deeply feathered, leaf-shaped, and the leaves are thin and hard in texture. Both stems and leaves can be eaten, with strong cold resistance, short growth period and strong aroma. They are very popular among vegetable farmers and are very suitable for cultivation in protected areas in the northern regions.
Second, fertilization site preparation
Before sowing, apply 5,000 kg of cooked farmyard fertilizer and 75 kg of high-efficiency compound fertilizer per mu. Spread it evenly on the ground. After deep plowing and deep plowing, plow flat for 1 to 1.5 meters wide, and use your feet to lightly step on it to prevent it from sinking after watering.
Third, timely sowing
Using energy-saving solar greenhouses, both sowing and precipitating sowing can be used for spreading and drilling. During the drill, the ditch is about 15 cm long and the ditch depth is 1 cm. Water the pot in the pot, sow the seeds after the water has penetrated, and spread evenly with the soil in the removed furrow. After covering the soil, remove the topsoil from the adjacent pods and prepare for the next round of sowing.
Fourth, field management
1. Water and fertilizer management. Keep the ground moist after sowing to facilitate emergence. When the seedling height is 3 cm, the toppings are filled with water and watered for 2-3 times during the whole growing period. When the seedling height is 9-12 cm, the first time the fertilizer is recovered, 10-15 kg of available nitrogen fertilizer is flushed into the water per acre, and a total of two additional fertilizers are produced.
2. Temperature management. After sowing, the temperature may be slightly higher, during the sunny day at 20°C-25°C, nighttime at 10°C, 4-5 days after emergence, maintained 15°C-20°C during the day after emergence, 8°C-10°C at night, but it must be Prevent high temperature damage.
3. Saplings. Plants have 1-2 true leaves when the seedlings begin, sowing, seedlings from 4 cm square is appropriate. With the method of drilling, it is necessary to loosen the dense seedlings.
V. Prevention and treatment of diseases
Artemisia halodendron disease mainly has leaf blight and downy mildew. In the initial stage of disease, spray 40% polysulfide suspension 500 times, 70% thiophanate-methyl WP 500 times, or 50% acetaminophen wettable powder 1500 times, spray once every 5-7 days. Spray 2-3 times continuously.
Six, timely harvest
Artemisia halodendron harvest is divided into one-time harvesting and staged harvesting. One-time harvesting is 40-50 days after sowing. When the seedling height is about 20 cm, it is close to the ground for harvesting. There are two methods for harvesting in stages: first, sparse harvesting, and second, keeping one or two branches harvested. After each harvest, the topdressing fertilizer was watered once to promote the germination and growth of lateral branches. Every 20-30 days, another cut was made. The harvest yield per acre is 1000-1500 kg.
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