The Platycodon grandiflorum is a perennial grassy plant. It is rooted in medicine and can be used for both medicine and food. Hi cool and humid conditions, afraid of water, hi light, cold. Suitable growth temperature is 10-20 °C, the optimum temperature is 20 °C, can tolerate -20 °C low temperature.
Choose soil, deep, fertile and well-drained humus soil or sandy soil for soil preparation. Apply 2,500 kg of compost and 20 kg of superphosphate per acre, and pour through 25 cm deep.
Timely sowing mainly to seed propagation (also transplanting seedlings, but the direct output is high, and less straight root bifurcation, good quality), spring sowing, autumn or winter sowing can be used for 2 kg per acre. The newly produced seeds were soaked in warm water for 12 hours and sowed in wet sand and mixed for a few days. On the surface of the raft, 18-21 cm spacing is used for trenching, the depth of the trench is 1 to 1.5 cm, and 0.5 cm of earth is covered after sowing. It can also be sowed by a wide-slide method, that is, the row spacing is constant, and the width of the ditch is 10 cm. This way, the management is simple and the finished product quality is better. When the temperature is appropriate, the seedlings usually emerge in 15 days.
Reasonably dense plant spacing 3-5 cm, using the appropriate width seeding seedlings, seedlings can not squeeze.
The cultivating and weeding platycodon grandiflorum grows slowly in the early stage and it is easy to breed weeds. It should be removed promptly. Set the ground first to irrigate the water, and immediately loosen the soil when the humidity is appropriate. The cultivator should be carried out when the soil moisture is moderate. No cultivating and weeding can be carried out after ridge closure.
Fertilizer management applies thin human fecal urine 1-2 times to promote seedling growth. At the end of June, additional flowering fertilizers were used, mainly phosphorus and potassium fertilizers. After the winter, the over-wintering fertilizer is applied again, and soil fertilization is carried out in combination with fertilization. In the second year of spring, when the plant height is 1 meter, the amount of nitrogen fertilizer is controlled, and in combination with the application of phosphorus and potash, the stem is stout. When the temperature is high and humid in summer, it will be drained in time to prevent rot.
The sparsely flowering and fruiting bellflowers have a long flowering period and need to consume a lot of nutrients, affecting the growth of the roots. Thinning and fruit thinning can increase the yield and quality of roots. Manual removal of flower buds or spraying of paclobutrazol during blooming can prevent flowering.
Prevention and control of diseases (1) root rot. The initial part of the root was yellowish-brown and rotted, and gradually enlarged later. In severe cases, the roots died withered. Prevention and treatment should pay attention to the rotation, timely drainage; rational fertilization, enhance plant resistance to disease; timely removal of diseased plants; lime or carbendazim for soil disinfection; when the incidence of thiophanate-methyl rooting. (2) purple feather disease. Hazardous roots, starting from the fibrous roots, and then extended to the main root; the disease was initially yellow-white, white fungus can be seen, then turned into a purple-brown, the root of the disease rot from the outside to the outside, woven into the mycelium membrane, ruptured when the outflow Slag residue. The upper part of the diseased plant gradually died from yellow from the bottom. The control method is the same as the root rot.
Harvesting processing is harvested in the same year or the following year. The northeast can be slightly earlier, and the harvest period is from the end of September to mid-October or the spring of flowering buds before the spring of the following year. The quality of harvesting in the fall is better. When the stems and leaves of the ground are withered, digging is done to avoid cutting off the main root. After the fresh roots are dug up, they will go to net soil and reed heads, scrape cork, wash, dry or dry. When the processing is not finished, sand can be buried to prevent the skin from drying and shrinking.
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1. Commodity name: Fresh Onion
2. Feature: Natural color, Thick and full skin, No stain and soil on outer skin, Firm and no rotten.
3. Size: 3.0-5.0cm, 5.0-7.0cm, 7.0-10cm
4. Variety: Yellow Onion and Red Onion
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