Dahlia tuber contains inulin, which plays a very obvious role in medicine. Dahlia can be used as medicine, which has the effects of clearing away heat and toxic materials, promoting blood circulation and removing blood stasis, so Dahlia also has medicinal value.

Drug name: Dahlia

Source: It is the root tuber of Dahlia, a dicotyledonous plant in Compositae.

Efficacy: promoting blood circulation and removing blood stasis.

Main treatment: treatment of traumatic injury.

Tropism of nature and taste: pungent, sweet and flat; Liver meridian.

Cultivation method of dahlia:

Soil selection: Dahlia is suitable for growing in loose sandy soil with rich humus and good drainage. The best soil for planting potted Dahlia is garden soil, humus soil, sandy soil and dry manure. The soil is sticky, so it is best not to use hardened soil, which is easy to be waterlogged.

Watering method: Dahlia likes water but avoids water accumulation, which is both afraid of waterlogging and drought. This is because dahlias have fleshy roots, which are easy to rot when watered too much, but they have lush foliage, large evaporation and need a lot of water. Therefore, the principle of "dry thoroughly and dry thoroughly" should be mastered in watering. Generally, in the early stage of seedling stage, the water demand is limited, so it can be watered once a day on sunny days to ensure that the soil is slightly wet and should not be excessively wet.

In the late growth stage, the branches and leaves are luxuriant and consume more water. In sunny or northerly weather, it is easy to lack water at noon or at night, so it is necessary to increase the amount of water appropriately.

Fertilization method: Dahlia is a kind of fertilizer-loving flower. Generally, dilute liquid fertilizer is applied once in Tina 10- 15, and once again 7- 10 days after germination. When the buds are completely colored, watering should be stopped, and fertilization should not be applied at high temperature.

The amount of fertilizer applied depends on the growth of plants, and those with light and thin leaves lack fertilizer; On the other hand, if there is too much fertilizer, the edges of the leaves will be burnt or the tips will turn yellow. The leaves are thick and green, which is a suitable performance of topdressing. The concentration of topdressing should be increased every time, so as to make the stem strong.

Pruning method: no matter how beautiful the flowers are, they will grow old. Learn to prune them. The pruning of potted dahlias should be flexible according to the variety. Generally, large varieties adopt single plastic method, while medium-sized varieties adopt four plastic methods. The unique plastic surgery is to keep the terminal bud, remove all the axillary buds, concentrate nutrition and form a unique low-plant dahlia with a big flower shape. Four shaping is the core of seedling selection, and two base branches are reserved to form four lateral branches, each with a terminal bud, which can form a potted dahlia with four stems and four flowers.

Ornamental value

Pear is called the world famous flower mainly because of its long flowering period, large flower diameter and many flowers. In northern China, the flowering period is from May to165438+1mid-October, and it can bloom all year round under suitable temperature conditions, especially after autumn. The maximum flower diameter of fine dahlia can reach 30~40cm, which is unique among flowers at present. There are seven color systems: red, purple, white, yellow, orange, ink and multicolor. Flowers have single petals and double petals. Single flowering time is short, double flowering time is long. The characteristics of flowers and the change of petal shape are the main basis for variety identification. There are varieties such as ball flower, chrysanthemum, peony, decorative flower, dish flower, dish flower, hydrangea flower, peony flower, etc., which are famous for their magnificent colors and beautiful flowers.

So dahlias are suitable for flower beds, flower diameters or gardens, and short varieties can be potted.

economic value

Dahlias are easy to grow and have good effects. It can be planted by ordinary families and has a long flowering period. Tuberous roots can be planted in late March, blossom in mid-June, and open until the first frost period, which can not only beautify the courtyard, but also bring economic benefits to farmers. So courtyard farming is a good direction.

In addition, because there is much rain in the south, the flower heads are easy to accumulate water and break, so it is relatively difficult to cultivate in the south, and the cultivation of Dahlia is mainly concentrated in the north. However, many aquaculture enterprises have continuously increased their efforts to cultivate new varieties and actively explored the southern market. China has cultivated dahlias suitable for planting in the south, which will be listed soon. The listing of these new varieties will drive the development of the Dahlia market in the south.