The method of propagation of Shegan

Shoot stem usually uses seed and rhizome to propagate, the production cycle of seed propagation is long, but the reproduction coefficient is high, the harvest of rhizome propagation is early, the effect is quick, but the reproduction coefficient is low, long-term planting will also lead to germplasm degradation, so it is appropriate to use the two methods alternately in production. Let's take a look at the reproduction method of shoot stem together.

The growth habit of Shegan

Shegan likes warmth and sunshine, is resistant to drought and cold, and is not strict with soil. dry land on hillside can be cultivated. Sandy loam with fertile and loose, high topography and good drainage is better, neutral loam or slightly alkaline is suitable, and low-lying land and saline-alkali land are avoided.

Rhizome propagation

1. Rhizome treatment: in late January, the shoot stem used for seed was dug out, and the robust, bright yellow and pest-free rhizome was selected and cut into 4 cm long root segments according to every 2 to 3 buds and part of the fibrous root (properly trimmed the long fibrous root to facilitate the survival of planting). After the incision healed, the seed rhizome was soaked in ABT4 rooting powder solution with a concentration of 50/1000000 for 3 hours. This can promote the germination of dormant buds and early emergence of seedlings on the rhizome. According to the experiment, compared with the untreated rhizome, the seedling emerged 10 days earlier and the emergence rate of rhizome bud increased by 30%.

2. Planting method: when shooting dry planting, dig holes according to row spacing 25cm 30cm, plant spacing 20cm 25cm, depth 15cm, the bottom of the hole should be flat, loosen the bottom soil, apply mixed fine soil in the open planting hole, then plant 1 to 2 segments of seed roots in each hole, then cover with fine soil 6cm and 7cm thick, slightly press and pour water (preferably rotten mature human feces and urine water), and then cover fine soil and border surface. Immediately cover the plastic film, about 50 days can emerge, at this time to break the film to release seedlings, to prevent high-temperature burning seedlings.

Shoot-dried seed propagation

1. Seed collection: usually when the dried fruit shell turns yellow and is about to crack from late September to early October, the fruit stalk is cut off and placed in an indoor ventilated place to dry before threshing.

2. Sprouting treatment: the seeds after harvest must not be exposed to the sun, otherwise the hardness of the seed coat will be increased, the dried seeds will have post-ripening, and the seeds sown in spring must be treated at low temperature before they can germinate. the seeds harvested in autumn should be mixed with 3 times of wet sand and buried outdoors. The size of the pit depends on the amount of seeds, keep it moist, keep it from freezing, and dig out the seeds the next spring. Seeds sowed in autumn should be soaked in 40-50 ℃ warm water for 24 hours, and then sown in the shade.

3. Sowing method: shoot-dried seeds can be propagated by direct seeding or seedling transplanting, and the sowing time is different due to open field and plastic film mulching.

① open field direct seeding: spring sowing is carried out before and after the Qingming Festival, autumn sowing is from September to October, and ditch sowing is generally used. On the finished border surface, the furrow spacing is 25cm × 30cm, and the ditch depth is about 5cm. The ditch bottom should be flat and loose, apply soil and miscellaneous fertilizer in each hole, cover fine soil about 2cm thick, and then sow 5cm 6 seeds. After sowing, cover soil compaction, appropriate watering, cover grass moisturizing and heat preservation. The seed consumption per mu is 2-3 kg, and the seedlings can emerge about 20 days after sowing.

② open field seedling raising: spring sowing is carried out in March, autumn sowing is from September to October, the border surface is watered before sowing, and after the water seeps out, the horizontal trench is opened according to the row spacing of 20 cm, the depth is 6 cm, and the sowing width is 10 cm. Then, the budding seeds are sown evenly into the ditch, covering the fine soil mixed with soil and miscellaneous fertilizer 5 cm thick, or sowing the prepared seeds into the seedling bed and covering 5 cm 6 cm thick fine fertile soil. Cover grass to keep moisture and heat preservation, the amount of seed per mu is 810kg.

③ temperature increase seedling: usually in order to prolong the growth period in the year of shooting and sowing, the plastic arch shed can be used to increase the temperature and sow the seedlings early and emerge early. Raising seedlings in the plastic arch shed can be carried out according to the conventional operation in the first and middle of January. After the seeds of the mixed sand storage cracks are sown into the seedling bed and covered with a layer of thin soil, warm water is sprayed once every morning and evening, and the seedlings can emerge in about a week, and the management of fertilizer and water can be strengthened after emergence. It can be planted in Daejeon in the middle and late March.