First, the preparation of land and selection
It is better to choose sandy loam soil with leeward sun, deep soil, loose and fertile, rich organic matter content, moist and well drained. The former stubble crops are preferably legumes and grasses. Cohesive soils and low-lying saline and alkaline lands should not be planted.
Second, apply base fertilizer
Apply 3500kg of rotten farm manure and 30kg of calcium superphosphate per mu, deep plough 30~40cm, and level it to make furrows. The furrow is 15 to 30 cm high and 1.0 to 1.2 m wide. When the soil is dry, water the furrow first, and then sow seeds when the water seeps down and the topsoil is slightly loose.
3. Breeding methods
The propagation methods of platycodon mainly include seed propagation, cutting propagation, and root-cutting propagation. Seed propagation is the main part of production.
1. Seed propagation The quality and yield of autumn sowing are higher than those of spring sowing. Autumn sowing is before mid-October. Sown before soil freezing in early November, no seedlings are produced that year, and no seed germination treatment is done before sowing.
Live broadcasting: There are two ways to broadcast seeds live and spread. Strip broadcasting is often used in production. Strip sowing according to the trench center spacing of 15 ~ 25 cm, ditch depth of 2.5 ~ 4.5 cm, banner 10 ~ 15 cm trench, the seeds are evenly sprinkled in the ditch, or with fine sand or fine soil evenly sprinkled in the furrow, sprinkle fine soil cover, to see the seed as the degree. 0.5 to 1.5 kg of seed per mu for strip sowing and 1.5 to 2.5 kg for sowing. Cover the furrow surface with grass for insulation and moisturizing after sowing.
(2) Seedling transplanting: The seedling method is the same as the live broadcast. Generally, after one year of cultivation, the stems and leaves wither in the autumn and germinate in the following spring before they emerge for colonization. Carefully dig out the roots, do not hurt the root system, so as not to cause branches, plant according to large, medium and small grades, according to the row spacing of 20 ~ 25cm, ditch depth of 20cm trench, according to the plant spacing of 5 ~ 7cm, the root vertical stretch into the ditch, cover the soil slightly higher than the heel, a little pressure, pour enough root water.
2, cuttings propagation to the middle and lower parts of the annual shoots and stems emitted from geography, the small cuttings are about 10cm long, the lower half of the leaves are removed, treated with naphthaleneacetic acid for 3 hours, the inserted matrix is about 1/2 long, and the water is watered in time after insertion, and the water is often sprayed to moisturize.
3, cut root propagation In the harvest, select medium-sized, disease-free, healthy and plump plants, 2 to 3 cm from the top bud cross-cutting, and then according to the distribution of the buds for longitudinal cutting, each cut has 2 to 3 buds, the cutting surface is required to be smooth and neat. The incision is planted after being treated with corn starch. The planting land is sandy, the bed surface is 1m wide and 20cm high, and the plant row spacing is 14cm× 10cm trenching is planted, and the fine soil is covered with 4~5cm after planting. (Transferred from: "Cultivation of Medicinal Plants") (Contributed by Shijingzuo Station)
【Source: Yancheng Agriculture and Rural Bureau_Current Agriculture】
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