Nitrogen deficiency in celery not only hinders plant growth, leaves are small, and the petiole is prone to hollowness. Phosphorus deficiency in the early stage, the late potassium deficiency has a greater impact on the yield and quality of celery. Celery is very sensitive to the reaction of boron fertilizer, and it will appear in the absence of boron. Celery in greenhouse should be watered and fertilized scientifically to improve the yield and quality of celery.
In the seedling stage, small water is poured. When the celery buds top the soil, lightly pour water once, and the seedlings can be released in 1~2 days. After that, keep the soil moist and a small amount of water. If the amount of water is too large, the seedlings are prone to appear lengthy or rotten. When the seedling height is nearly 10 cm, it can be topdressed with water for 1~2 times.
Seedlings are planted after planting the seedlings. Planting to slow seedlings should be poured and lightly poured to keep the soil moist. After the seedlings are slowed down, the plants begin to grow. The amount of water should be controlled and cultivating should be carried out to promote the roots under the roots and accelerate the differentiation of the heart leaves. If the water is too large, the outer leaves are prone to be long, and the leaf heart is not developed, which is prone to disease.
Increase the amount of fertilizer applied during the vegetative growth period. After the seedlings are finished, the plants begin to accelerate their growth. The quick-acting nitrogen fertilizer should be applied immediately, and the potassium fertilizer should be applied 1 to 2 times later. Generally, water is poured every 3 to 4 days, and the amount of irrigation can be less, so as to avoid the ground temperature being too low, which is not conducive to the petiole hypertrophy. The whole plant can spray 30~50 mg/kg gibberellin 1~2 times in the first half of the harvest.