What are the functions of Radix Rehmanniae? How to plant it?

Rehmannia glutinosa is a kind of traditional Chinese medicine which often appears in wasteland, hillside and other places, because its root is yellow and white, so it is called this name. Rehmannia glutinosa is planted in all parts of our country. Rehmannia glutinosa, Radix Rehmanniae, Radix Rehmanniae, which we are familiar with, actually refers to its root, and the efficacy of the root of Rehmannia glutinosa in different production methods is also different, so we must pay attention to it. So what are the functions of Rehmannia root? How to plant it?

What are the functions of Radix Rehmanniae?

Fresh Rehmannia root is mainly the role of clearing heat and cooling blood, slightly dried is called raw Rehmannia glutinosa, the effect is basically the same. The root of Radix Rehmanniae is mainly used to replenish qi, lower blood pressure, irregular menstruation and so on. But you should not go to the drugstore to buy and take it, because not everyone is suitable to eat Rehmannia root. For example, some cases such as weakness of spleen and stomach and diarrhea are not suitable to eat Rehmannia, which will aggravate the symptoms. If you eat radish, scallion and other food, Rehmannia glutinosa is not recommended.

Note that when frying water with Rehmannia glutinosa, don't use bronze or iron, just fry it with a ceramic medicine jar.

How to plant the root of Rehmannia glutinosa?

1. Choose a suitable planting place

Planting Rehmannia root soil should generally choose good drainage, good air permeability, deep and fertile sandy soil, which is more conducive to the growth of Rehmannia glutinosa. The soil should be mixed with base fertilizer, and generally mature compost is a good choice.

2. Seed selection

Rehmannia glutinosa is a kind of medicinal material for rhizome propagation. It is generally necessary to choose the seeds with few diseases, strong disease resistance, high yield, good quality and good adaptability to the environment. Usually take a small section in the middle, and then cut it into a small section, leaving two or three bud holes, and then disinfect the incision and dry it.

3. Daily management

(1) Rehmannia glutinosa seedlings, replenish seedlings: when Rehmannia glutinosa seedlings grow to about 10cm, you can start to grow seedlings. If you encounter overcast and rainy weather, you should immediately replenish seedlings to ensure late recovery.

(2) weeding: weeds are easy to appear in the seedling stage of Rehmannia glutinosa root, but Rehmannia glutinosa is a plant with shallow root system, so you must pay attention to gentle action when pulling grass, otherwise it will damage the root of Rehmannia glutinosa.

(3) watering: the early growth of Rehmannia glutinosa root needs a lot of water, so the watering times should be more, but there can be no stagnant water, otherwise there will be root rot. In the later period of underground rhizome expansion, it is necessary to reduce the number of watering and the amount of water. When it comes to the rainy season, pay attention to the timely discharge of stagnant water.

(4) topdressing: Rehmannia glutinosa likes fertilizer very much. If there is not enough fertilizer, the root will be small and the growth will be slow. The basal fertilizer in the early stage can only meet the growth of the seedling stage, and topdressing one or two times in the later stage of root expansion.

4. Pest control

Common diseases and insect pests of Rehmannia glutinosa usually begin to appear in May, such as Fusarium wilt, spot blight, red spider, ground tiger and so on. Therefore, to choose a professional drug symptomatic treatment, in accordance with national regulations to use pesticides.

To sum up: the efficacy of Radix Rehmanniae varies according to its raw and cooked, so we must pay attention to it when buying. If you are planting Rehmannia glutinosa, you should also pay attention to the details mentioned above.