What causes hollow celery in greenhouses in autumn and winter?
Celery grown in warm water in autumn and winter is very 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 find out together.
1. High temperature and low temperature environment
In autumn and winter, celery is mostly grown 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 cause hollow celery. High temperature accelerates tissue differentiation in celery, while low temperature cannot meet the plant's demand for water, 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 greenhouses, temperature and humidity must be well controlled. The temperature should be between 15-23 degrees for sowing, and must not be lower than 10 degrees at night.
2. Insufficient fertilizer and water
The root system of celery is relatively strong in distribution 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 phosphorus fertilizer should be applied. Insufficient phosphorus fertilizer will lead to weak seedling growth and leaf differentiation, and hollowing will appear later. Also, when growing 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 celery growth, and can even promote its growth. Generally, water once every half month. The amount of water should not be too much; use a small amount of water. Half a month before harvest, water heavily twice.
3. Harvesting too late
Hollow celery is also related to harvest time. If the harvest time is too late, its fibrous tissue keeps growing, causing the root absorption capacity to decline in summer and the stems and leaves to age, so hollowing occurs. Therefore, attention must be paid during harvest. When it is time to harvest, it must be harvested in time. Do not delay, or it will have the opposite effect.
The above is an introduction to what causes hollow celery in greenhouses in autumn and winter. I hope it can help you. To learn more related knowledge, please follow us.