In the winter, in the process of producing celery in a solar greenhouse, hollow phenomenon often occurs, resulting in increased celery cellulose, poor quality, reduced yield, reduced celery's commerciality, and thus affecting the income of vegetable farmers. So, what management measures should be taken in production?

First, scientific watering

In order to avoid the hollow phenomenon of celery, we must first manage the moisture. In terms of production, vegetable farmers are often afraid of watering the soil more often because of the frequency of watering, thus affecting the normal growth of celery, resulting in the lack of adequate water supply for celery growth. In fact, as long as the watering is appropriate, it will not affect the normal growth of celery. Usually watered once every 15 days, the amount of water should not be too large, a small water can slip. Especially in the period of strong growth, we must ensure adequate water supply, and watering should be sufficient in about 15 days before harvest.

Second, control the appropriate temperature

Celery is a kind of cold-resistant vegetable, requiring cool and moist environmental conditions, cultivation of celery in the greenhouse, the temperature during the day is preferably 15 ~ 23 °C, the maximum should not exceed 25 °C. It should be kept at about 10°C at night to reduce nutrient consumption and hollowness can be avoided effectively. However, the minimum temperature should not be lower than 5 °C, otherwise it is prone to frost damage and convulsions.

Third, fertilizer management

On the basis of applying base fertilizer, the top-dressing fertilizer in the growing season is mainly available nitrogen fertilizer, and with the application of potash fertilizer, the application amount is 20 to 25 kg each time, and it is chased once every 15 days. The application of 0.3% to 0.5% borax solution for foliar spray fertilizer has obvious effect on the prevention of the occurrence of the hollow disease.

Fourth, timely harvest

The celery planted in the greenhouse cannot be harvested too late. When the harvesting period is too late, it often results in the aging of the petiole, the ability of the photosynthesis of the leaves to decline, the ability of the roots to absorb nutrients will be weakened, and the lack of nutrition will also cause the parenchyma cells to rupture, resulting in hollow The phenomenon occurs.

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