STDs Infectious Bioantibody Biotechnology Co., Ltd. , https://www.bioantibodymedical.com
Causes and prevention of hollow cracking of the celery stem
In the middle and late stages of celery growth, white spots, hollows, or horizontal and vertical cracking of the petioles often occur on the petiole cross-section. The reason for this is: The lack of boron in soil is the main cause of cracking of petiole. Solution: Use 0.5 to 1 kg of borax per acre as basal fertilizer. If a slight cracking shank is found, a 0.2% to 0.5% borax aqueous solution may be used for foliar spray, or 0.25% borax aqueous solution may be used for root irrigating. Improper sowing time or less nitrogen fertilizer exposed to the autumn sowing late planting, coupled with lack of nitrogen fertilizer, plant growth is poor, harvesting season plants can not reach the harvest standard, and in the case of delayed harvest, vulnerable to low temperature, cold wave Infestation, petiole softening, intensifying the hollow phenomenon. Therefore, localities should determine suitable sowing dates based on local climatic conditions and cultivation facilities, and strengthen fertilizer and water management before and during growth to provide sufficient nitrogen fertilizer. The plants were not tolerant to cold due to cold celery, and they were prone to freezing symptoms below 0°C. When the plants are severely chilled, the structure of the petiole is destroyed. After the temperature rises, the tissue cannot be recovered and the cell gap increases, resulting in hollow. Therefore, in the cultivation process to prevent freezing, insulation measures should be used to avoid open winter. Variety degraded celery and common celery are prone to natural hybridization, so celery must be strictly isolated from other celery varieties when it is reserved. At the same time, in the process of seed production, some hollow plants should be prevented from being planted so as to avoid increasing the proportion of hollow plants.