How to cultivate Artemisia annua in greenhouse

Artemisia annua is also known as Artemisia, chrysanthemum cauliflower, Artemisia annua, Artemisia seed, cauliflower (also known as goose cauliflower in Fujian and other places), for Compositae annual or biennial herbs, leaves alternate, long-pinnately divided, flowers yellow or white, very similar to wild chrysanthemum. Achene edge, two or three feet high, stems and leaves can be eaten when tender, can also be used as medicine. In ancient China, chrysanthemum was a court delicacy, so it was also called emperor cuisine. Artemisia annua has the breath of Artemisia annua and the sweet fragrance of chrysanthemum. According to Chinese ancient medicine books: Artemisia artemisia taste sweet, pungent, flat, non-toxic, with the effect of "reassuring qi, nourishing spleen and stomach, eliminating phlegm drink, benefiting intestines and stomach". Ornamental cultivation in gardens all over China. There are wild in Hebei, Shandong, Shijiazhuang and other places.

It is the stem and leaf of Artemisia annua L., a plant of Compositae. Also known as Artemisia, Chrysanthemum cauliflower, Artemisia, with Artemisia, Italian vegetables (goose vegetables), moxa, chrysanthemum is an annual or biennial herb. The roots, stems, leaves and flowers of Artemisia annua can be used as medicinal materials, which can clear blood, nourish the heart, reduce blood pressure, moisturize the lungs and clear phlegm. Artemisia annua has a special fragrance, seedlings or tender stems and leaves for stir-frying, cold salad, soup to eat. In Europe, chrysanthemum is used as flowers in flower beds. Artemisia annua L. is a shallow root vegetable with roots distributed in the green layer of the soil. The stem is round, green, with artemisia flavor. Leaves long, margin undulate or parted, mesophyll thick. Heads, flowers yellow, achene, brown. The seeds used in cultivation, called achenes in botany, are angular and have an average weight of 1.85g. Artemisia annua likes cold and cool, can not bear high temperature, the suitable growth temperature is about 20 ℃, the growth is slow below 12 ℃, and the growth is poor above 29 ℃. Chrysanthemum chrysanthemum is not strict with light, so it is better to use weaker light. It belongs to long sunshine vegetable, under the condition of long sunshine, vegetative growth can not be fully developed, and it will soon enter reproductive growth and blossom and bear seeds. Therefore, the cultivation should be arranged in the spring and autumn season with short sunshine. The requirement of fertilizer and water condition is not strict, but it is better not to accumulate water. According to the leaf size, the varieties of Artemisia annua can be divided into two types: Artemisia annua L. and Artemisia annua L.

Nutritional value of Artemisia annua L.

The roots, stems and leaves of Artemisia annua are edible and contain extensive and rich nutrients, especially high contents of carotene and minerals. Its fiber is delicate and easy to digest and absorb, which is good for the growth of children and gastrointestinal malabsorption in the elderly. In addition, there is more iron in Artemisia annua, which is helpful to the growth and development of children and patients with anemia. In addition, chrysanthemum also contains a volatile essential oil and choline and other substances, so it has the effects of regulating stomach and spleen, reducing blood pressure and tonifying brain. Often eat chrysanthemum, cough phlegm, spleen and stomach disharmony, memory loss, habitual constipation have a better effect. When chrysanthemum chrysanthemum is fried with meat and eggs, the absorption rate of vitamin A can be improved. Stir-fry Artemisia annua, mixed with sesame oil, monosodium glutamate, refined salt, light and delicious, most suitable for patients with coronary heart disease and hypertension.

How to cultivate Artemisia annua in greenhouse?

Choose the land. During the vegetative growth period, the stem of Artemisia annua can be as high as 20Mel 30cm, so it can be planted in the lower part of the south of the greenhouse where high-seedling crops (such as kidney beans, vat beans, etc.) are planted.

Choose a variety. Artemisia annua can be divided into two types: large-leaf varieties and small-leaf varieties, and leaflet varieties are mainly used in greenhouse cultivation. Leaflet varieties are more cold-tolerant, the growth period is 40-50 days.

Cultivation techniques. The cultivation of Artemisia annua requires that the soil be kept moist all the time. In order to separate from the planting bed of high-seedling crops, the border cultivated Artemisia annua should be made into a separate flat border for watering. In order to promote seedling emergence, seed soaking and sprouting can be carried out, and wet sphincter method can be adopted for strip insertion or sowing. Cover 1 cm of soil after sowing and tightly cover the plastic film. Generally use 4-5 kg of seed per mu.

After emergence, remove all the plastic film, keep the border dry and wet at the stage of 1-2 true leaves, interseedling and pull out weeds, and keep the distance between seedlings about 4 cm. Pay attention to often observe the humidity in the greenhouse to avoid excessive moisture, resulting in the occurrence of diseases of high-seedling crops in the greenhouse.

During the growth period, with the water 1-2 times available nitrogen fertilizer, when the plant height is about 20 cm, the harvest should not be too late, so as not to affect the quality. After cutting the first knife, then watering and topdressing to promote the occurrence of lateral branches, and harvest after 20-30 days. Each time the amount of topdressing is 10 kg urea per mu.