What causes hollow celery in greenhouses in autumn and winter

Celery grown in warm water culture in autumn and winter is highly prone to hollowing and increased fiber, which greatly reduces the commercial value of celery and brings huge economic losses to farmers. So what causes hollow celery? How should it be prevented and controlled? Let's take a look together.

1. High temperature and low temperature environment

In autumn and winter, celery is mostly cultivated in greenhouses. If the temperature and humidity in the greenhouse are not properly controlled during cultivation, a long period of high temperature and low humidity can easily lead to hollow celery. High temperatures accelerate tissue differentiation in celery, while low temperatures cannot meet the plant's water needs, causing the pith tissue of the plant to break down, leading to hollow celery and increased fiber. Therefore, to avoid these situations, when cultivating in a greenhouse, temperature and humidity must be well controlled. The suitable sowing temperature is between 15-23°C, and at night it must not be lower than 10°C.

2. Insufficient fertilizer and water

The root system of celery is relatively strong but not well developed, so its absorption capacity is limited. Once fertility is insufficient, hollowing and increased fiber are very likely to occur. Therefore, fertilization must be reasonable. At the seedling stage, more phosphate fertilizer should be applied. Insufficient phosphate fertilizer will lead to weak seedling growth and leaf differentiation, and hollowing will appear later. In addition, when cultivating celery in autumn and winter, everyone worries that watering will lower the ground temperature and affect the normal growth of celery. In fact, as long as watering is appropriate, it will not affect the growth of celery, and can even promote its growth. Generally, water once every half month. The amount of water should not be too much; use light watering. About half a month before harvest, water heavily twice.

3. Harvesting too late

Hollow celery is also related to harvest time. If harvesting is too late, its fibrous tissue keeps growing, causing the root absorption capacity to weaken, and the stems and leaves to age, resulting in hollowing. Therefore, attention must be paid during harvest. When it is time to harvest, it must be harvested promptly. Do not delay, or it will have the opposite effect.

  The above is an introduction to what causes hollow celery in autumn and winter greenhouses. We hope it can help you. To learn more related knowledge, please follow us.