How to choose the seeds of Erigeron breviscapus? What are the methods of raising seedlings?

Erigeron breviscapus gets its name because its flower is like a lamp and its root is like Asarum. It is a perennial herb, flowering throughout the year, the traditional use of whole grass medicine, summer and autumn collection. At present, the demand for raw materials and biological drugs of Erigeron breviscapus is growing in the pharmaceutical market. Erigeron breviscapus is listed as a key variety of Chinese herbal medicine by the state, and more farmers are planted. So how to choose the seeds of Erigeron breviscapus? What are the methods of raising seedlings? Next, let's have a look with the editor.

How to choose the seeds of Erigeron breviscapus?

Erigeron breviscapus can choose Kunzhi 7 as the cultivated species. The germination rate of the old seeds in the next year is very low, and the new seeds collected in the same year must be used. The new seeds germinate quickly, the germination rate is high, and the seedlings are uniform and robust, which is beneficial to management. Due to the inconsistency of seed maturity, the germination rate test should be carried out before reproduction, and the germination rate should reach more than 50% before it can be used for seed.

Soak the seeds in about 30 ℃ of warm water for 4-5 hours, then remove the seeds and leave them for about 3 hours until the surface moisture is slightly dry.

What are the breeding methods of Erigeron breviscapus?

1. Seedbed preparation

The fields with sunny, flat terrain, good drainage and irrigation and convenient transportation should be selected as planting land, and the loose, fertile sandy loam soil rich in organic matter should be the best. Turn the ground to dry the soil. After turning 20cm deeply, 3000 kg of rotten barnyard manure and 15 ∶ 15 ∶ 15 potassium sulfate compound fertilizer 5kg were applied per mu. Intensive cultivation and weeding before sowing are required.

2. Sowing and raising seedlings

Spring sowing, summer sowing and autumn sowing are OK. Spring sowing may lead to irregular emergence due to drought, and neat emergence in summer and autumn. Spring sowing takes place from late February to early March, summer sowing takes place in May-June rainy season, and autumn sowing takes place in August-September.

The prepared seeds mixed with fine dung were evenly scattered on the sand bed, covered with about 1cm, covered with grass on the surface and watered thoroughly. 2-4g/m2 was suitable. The seedlings should be raised in 50 m2 per mu, and the seedlings could emerge 5-7 days after sowing.

3. Seedling stage management

The seedling stage is usually 90-95 days.

(1) shading. The seedling growth of Erigeron breviscapus is thin and weak, and it is afraid of drought, waterlogging and sunburn. Whether it can be planted successfully or not, seedling management is the key. Therefore, proper shading in the seedling site is an important measure for seedling management. After the seedlings survive, they can enhance their tolerance to strong light, resist direct sunlight and grow in the open field.

(2) build an arch shed. The seedling shed builds the arch shed, inserts the bamboo piece in the soil moisture edge, inserts one piece every 70cm, achieves the soil moisture arch shape, first covers the film, then covers the sunshade net, the four corners of the sunshade net are fixed with small wooden piles, and finally press the sunshade net with the bamboo piece on the reverse side to prevent the wind blowing the film from flying. Note: when the temperature in the arch shed reaches 40 ℃, the temperature should be drilled and ventilated in time to prevent seedling burning.

(3) Fertilizer and water management. Erigeron breviscapus has strict requirements for moisture. It is necessary to keep the seedling bed moist within 20 days after sowing, properly control moisture after seedling completion, and dry watering the topsoil. On the basis of sufficient base fertilizer, nitrogen fertilizer was applied every 30 days, urea 5-6 kg per mu each time.

(4) pest control. The main diseases in the seedling stage of Erigeron breviscapus are root rot and downy mildew, which requires strict control of soil moisture. The main pests are small land tiger, cabbage worm, etc., which can be controlled by high-efficiency and low-toxic pesticides, preferably biological pesticides.

The above is the introduction of Erigeron breviscapus. Erigeron breviscapus is mainly distributed in Hunan, Guangdong, Guangxi, Guizhou and Sichuan provinces in China, growing in the open slopes of Zhongshan and subalpine grasslands and forest margins at an altitude of 1200-3500 meters. In recent years, as a good natural medicine for the treatment of cardiovascular and cerebrovascular diseases, Erigeron breviscapus has experienced the development process from wild breeding to standardized planting.

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