How to select the seeds of raw land? What are the methods of raising seedlings?

The place of birth, also known as Rehmannia glutinosa, is a kind of Chinese herbal medicine, which has the effect of clearing heat and cooling blood, benefiting yin and fluid, and has many benefits to the human body. So how to select the seeds of the general birth place? What are the methods of raising seedlings? Friends who have ideas about planting land can read the following article to understand!

First, how to select the seeds of the place of birth?

The seed of the unripe place should choose the spring seed place with no disease, strong growth and concentrated fruit. Dig up the spring seed land, fold it into a 5 cm long section and let it dry for 2 hours. After the wound is healed, store indoors or in a sand cellar, spread 10cm sand, flatten it, put it according to row spacing 7cm 8cm, each piece spacing 1cm, cover sand 7cm, ensure cellar temperature 5cm 7cm, sand water content about 20%, 667m2 seed 80cm 100kg.

Second, what are the breeding methods of native seeds?

1. Land selection and preparation

It is appropriate to choose sandy loam with deep, fertile and good drainage. Turn the soil more than 25 cm deep in the first winter or early spring and apply 2000-3000 kg of rotten compost per mu and 25 kg of superphosphate as base fertilizer. Then, leveling and raking fine to make the border, the general width of the border is 1.3 meters. Special attention should be paid to the fact that the raw land should not be replanted, which is also the key measure that should be paid attention to in the selection of land.

2. Seed selection and planting

In general, the rhizome is used as the breeding material in the cultivated land, which is called "planting" in production. The 'planting' of the raw land is generally selected from the 'inverted' and 'planted' cultivated from July to August last year, because when the 'inverted' and 'planting' is used as seed, the yield of the raw land is high, the quality is good, and the degradation of the variety can be prevented. Before planting, cut off the head and tail of the plant, and take the middle section. Then cut into small sections 3-6 cm long, each section should leave two to three bud holes, the incision should be stained with plant ash, and then planted after slightly drying. Generally, the planting density row spacing is 30-40 cm, and the plant spacing is 25-30 cm. Dig a hole 3-5 cm deep on the whole border surface, put 1-2 sections of 'planting' horizontally in each hole, cover 1 handful of ash mixed with dung water, and then cover the border with fine soil. You need to plant 40-60 kg per mu. Pay attention to the selection of seeds to try to use "upside down" and "planting", avoid the use of small commodities, at the same time "planting" to remove the "old mother and son". That is, it was planted in the first ten days.

3. Field management

(1) and time to replenish seedlings. When the height of the seedling is 10-12 cm, the seedlings begin to grow, leaving 1 strong seedling in each hole. If there is a lack of plants, they should be replanted in time in cloudy days, and the seedlings should be raised with soil when replanting, so that the survival rate is higher.

(2) weeding by ploughing. The rhizome is shallowly buried in the soil, and the middle tillage should be shallow to avoid root damage. The weeds around the seedlings should be pulled out by hand. After the plants are closed, stop the middle tillage.

(3) topdressing. The raw land likes fertilizer. In addition to applying sufficient base fertilizer, 100 kg of superphosphate and 30 kg of rotten cake fertilizer are applied per mu after the seedlings to promote the development and expansion of the rhizome. When the row is closed, fire soil ash is applied once between rows to promote the healthy growth of the plant.

(4) Irrigation. There is a large amount of water demand in the early stage of growth, so it should be watered frequently, and the later stage is the period of underground rhizome expansion, so water should be saved. Attention should be paid to timely drainage in the rainy season to prevent the occurrence of root rot

(5) except for string skin root. In addition to the main root, it can also grow slender underground stems along the surface, called string bark roots, which lose a lot of nutrition and should be eradicated in time.

In the above, the editor gave you a detailed account of the selection of raw seeds and breeding methods, which is quite useful for beginners, and friends who think this article is not bad can collect it.

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