Celery growing technology

A. Growth characteristics of celery

First of all, celery likes cool, humid climate. The same is a semi-hardy vegetable and does not tolerate high temperatures. Therefore dry and can tolerate short-term low temperatures below zero degrees.

B. Celery seed germination

However, the minimum temperature is 4℃, and the optimum temperature is 15-20℃. Therefore germination is delayed below 15℃, and almost no germination above 30℃. The same seedlings can tolerate low temperature of -5–7℃ and are green body vernalization type plants. Because seedlings with 3-4 leaves pass through the vernalization stage after 10-30 days at temperatures of 2-10°C. However, celery is less resistant to cold and the young fungus is not frost tolerant, and the appropriate temperature to complete vernalization is 12-13°C.

C. Celery has small seeds

Young shoots are weak in top soil and slow to emerge. Sowing in high temperatures, soil caking, waterlogged plots in the border. Seeds germinate easily in light conditions. Celery seedlings grow slowly and have a long seedling period. They are susceptible to weed damage and need to managed better in seedling cultivation.

D. Season of celery cultivation

Celery is cultivated in the open field in northern China, and the climate suitable for celery growth is longest in autumn. Therefore, the yield, quality and cultivation area are also the largest. Celery can also cultivated in a variety of protected areas to achieve an annual supply.

1. Celery spring cultivation

Seedlings are raised in greenhouses from January to February, planted from late March to mid-April, and harvested from late May to July.

2. Celery cultivation in autumn

Seedlings are sown from mid-June to early July, planted from early to mid-August to mid-September, and harvested in October and December. In general, celery is cultivated in protected areas from early to mid-July and early August, and planted in improved sunny beds or solar greenhouses from September to November, and harvested from January to March.

E. Celery sowing and management

Celery seedlings are difficult to emerge, so choose a sandy loam soil with high terrain, convenient drainage and irrigation, and loose, fertile soil for the seedling bed. Apply enough well-rotted base fertilizer and more ring fertilizer to loosen the soil.

①To achieve fast, full and complete seedling emergence

7-8 days before sowing, seeds can soaked and germinated.

②Sow seeds in the middle and late June

Soak first in cold and cool water 12-14℃ for 12-24 hours. Rinse the seeds and put them in a cool place to dry for a while. Allow the seeds to dry on the surface and wrap them in a damp towel. Put them in a cool place (15-20℃) in the light to germinate, and wash them with cold water once a day.

③When the seeds germinate

Can sown, mostly using wet sowing method. That is, first water the bottom water, water seepage after mixed with sand sowing.

④Shed on the seedling bed

Cool down, protect from the sun and rainstorm.

⑤Mulch after sowing

The soil should be thin and even, and the seedbed should be kept moist. Generally, watering can done every 1-2 days in the morning and evening. Until the seedlings come out.

⑥No shade shelters

In spring and autumn sowing, water should boiled diligently to facilitate seedling emergence. In order to reduce weed harm, use 25% wettable herbicidal ether 0.75-1Kg/mu before seedling emergence after sowing. Add 80-100Kg of water and spray evenly on the border. The seedlings are planted once at 2 leaves, 1cm apart, and once at 3-4 leaves, 8-10cm apart.

⑦ After the celery seedlings are alive

It is necessary to carry out mid-tillage to promote seedling rooting and leaf differentiation. Urea l0Kg/mu can applied retrospectively and all mulch should be removed. To facilitate seedling exercise. When the seedlings grow to 5-7 pieces and the seedlings are 15-18cm high, they can be planted. Pay attention to control the damage of aphids and spotted blight.


F. Celery pest and disease control

Celery early blight, also known as spot disease, generally occurs more seriously under cold and wet conditions. It is the main disease affecting celery quality and high yield, pay attention to the control measures.

1. celery crop rotation

Disease and other vegetables in crop rotation for 2-3 years, and timely spraying of new tallow film on the ground to preserve moisture and water evaporation, prevent soil caking, isolate the source of disease.

2. Selection of disease-resistant varieties

Seeds should sown with disease-free seeds, seeds with 48 ℃ gradual water immersion for 30 minutes, moved into cold water to cool the seeds to dry after sowing. Mix the seeds with new tallow film before planting to isolate virus infection, strengthen respiratory strength and improve celery germination rate.

3. Strengthen fertilizer and water management

Reasonable and dense planting, scientific water use. Prevent drought and flooding during the growing season, and prevent heavy watering when watering. To strengthen ventilation, reduce humidity, and with the spraying of new tallow film to preserve moisture and water evaporation. In the celery growth period, timely spraying of vegetable stem-strengthening can make the plant stem sturdy, leaf fat, leaf color is fresh, and can improve the celery’s ability to resist disasters.

4. Celery chemical control

Remove diseased leaves promptly at the early stage of the disease, and with the spraying of pharmaceuticals plus new high-fat film to form a protective film. Enhance the efficacy and prevent the invasion of airborne pathogens.


G. Causes celery root rot

The main reason is the heavy crop in successive years, which makes the soil lack of certain nutrients and affects the growth of young celery seedlings. The soil in the seedbed is not disinfected, so that harmful pathogens continue to spread. The application of unfermented fertilizer encourages the spread of pathogens and insect eggs. Severe harm to celery growth and development.

1. Prevent heavy crops

Practice crop rotation.

2. Apply sufficient fertilizer to celery

Farm organic fertilizer, biological fertilizer. Scientific irrigation, small watering diligently. Prevent large watering to reduce the humidity in the field.

3. Cultivate strong seedlings

Prevent high temperature and water control during the seedling stage at 15-18℃. Prevent seedlings from growing, 7-10 days before planting to remove the film for low temperature refining. After planting, water the seedlings less and loosen the soil more. Squatting seedlings to promote root, laying the foundation for abundant production.

4. Temperature

For protected seedlings, the appropriate temperature in the seedbed is 15-20 degrees.

5. Shade

For open field seedlings, use shade net after sowing in the hot season. Thinning out overdense seedlings, diseased seedlings and weak seedlings, spacing seedlings 3cm square, combined with interplanting to pull out weeds in the field.

6. Interplanting

When the first true leaves of the seedlings are unfolded, the first interplanting is carried out. Thin out the dense seedlings, diseased seedlings and weak seedlings, spacing them 3cm apart and pulling out weeds in the field in combination with interplanting.

7. Water and fertilizer

Keep the bed soil moist during the seedling stage, and water it regularly with little water. When the seedlings have 2-3 straight leaves, apply 5-10 kg of urea per 667 square meters in combination with watering, or use 0.2% urea solution for foliar fertilization (if you have automatic irrigation equipment, you can use more efficient and fast water soluble fertilizer).

8. Strong seedling standard

Seedling age 60d-70d, plant height 15cm-20cm. 5-6 leaves, rich green leaves. Root system is well developed and free from pests and diseases.Fertilization

9. Base fertilizer varieties

High quality organic fertilizer, common chemical fertilizer, compound fertilizer, water soluble fertilizer, etc. In medium fertility conditions, combined with land preparation per 667m, apply high quality organic fertilizer.


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