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The anti-celery petioles are cracked and hollow, which can be caused by several factors that need to be carefully managed. Here are the key issues to consider:
First, variety degradation is a common problem. When growing celery, it's essential to isolate the seed varieties from other types of celery to avoid cross-pollination and hybridization, which can lead to poor quality and reduced yield.
Second, improper sowing time or insufficient nitrogen fertilizer can cause problems. Celery requires adequate nitrogen for healthy growth. If the sowing is too late or the nitrogen supply is inadequate, the plants may not reach their full size before the harvest season. This can result in underdeveloped plants that are more susceptible to damage from cold weather, leading to soft and hollow petioles. To prevent this, it's important to choose the right planting time and ensure proper fertilization throughout the growing period.
Third, a lack of boron in the soil can also cause cracking in the petioles. Celery has a high demand for boron, and when deficient, the stems become brittle and prone to cracking. A recommended practice is to apply 0.5 to 0.8 kg of borax per acre as a base fertilizer before planting. If some cracking occurs after transplanting, applying the same amount of borax mixed with water can help reduce further damage.
Fourth, soil drought is another factor that contributes to hollow and cracked petioles. The shallow root system of celery makes it vulnerable to water stress. Maintaining consistent soil moisture and high humidity is crucial, especially during the growth phase. Drought can interfere with the plant's ability to absorb nutrients like boron, leading to deficiency symptoms and structural weaknesses. Therefore, regular and even watering is necessary to prevent issues such as small leaves, excessive fiber in the petioles, and hollowing.
By addressing these factors—variety isolation, proper fertilization, boron supplementation, and adequate irrigation—farmers can significantly improve the quality and yield of their celery crops. These practices not only help prevent hollow and cracked petioles but also promote overall plant health and productivity.