Campanulaceae: soil preparation, sowing, seedling, transplanting

First, land preparation and land preparation

Choose a sandy loam that is sunny, deep in soil, and well drained. After the land selection, apply fertilizer or fertilizer 3000kg per mu, add 50kg of calcium phosphate and cake fertilizer, or 15kg of diammonium phosphate, spread it evenly in the ground, deep-plow the soil 35cm, level the fine, make 1m wide flat, length to Depending on the terrain.

Second, the mode of reproduction

(1) Seed propagation: 2 years of growth.

Live broadcast is generally used in production. The platycodon grandiflorum seeds are small, with a thousand-grain weight of 1.5 g and a germination rate of 85%. At a temperature of 18 to 25 ° C and a sufficient humidity, the seedlings are emerged 10 to 15 days after sowing.

Winter broadcast: Winter broadcasts from November to January. Generally used broadcast. When sowing, mix the seeds with moist sand and mix well (the ratio is 1 pot of soil mixed with 0.3kg of seeds) and sprinkle it on the surface of the clams. Sweep it with a broom and use a breeze for a slight degree of vibration. In the spring of the next year, the seedlings are early.

(2) Seedling transplanting: the growth period is 1 year.

1, nursery: Campanulaceae seedling transplanting generally in April to June can be, too early, because the platycodon seedlings affect the quality of the seedlings, too late seedlings affect the transplanting, the general use of the amount of 10 to 12kg. The specific method: the choice of land can not be in high slopes or low-lying fields, it is best to choose well-drained fields, the land should be intensively cultivated, and the bottom fertilizer should be applied. It is best to deepen more than one-and-a-half feet to make a good surface. Spray the irrigation water in the drought, then spread the stalks of the platycodon grandiflorum evenly and spread it evenly. The above is slightly shocked, covering the weeds and keeping the soil moist. Generally, the seedlings can be emerged within 10 to 12 days. Cover to facilitate seedling growth.

2. Transplanting: The growth period is 1 year. In the autumn and winter of the year to the spring of the next year, the buds were selected, and the 1 year old straight platycodon seedlings were selected, large and small grading, and planted separately. When planting, on the whole planting ground, according to the groove with a line spacing of 20cm and a depth of 25cm, then the platycodon seedlings are inserted into the ditch at a 75-degree angle. According to the plant spacing of 6~8cm, the soil is compacted, and the covering soil should be slightly higher than the head of the seedling. degree.