Summer celery should be less and more frequent

On the basis of applying enough basal fertilizer, apply fertilizer frequently.The first fertilizer should be applied 5-7 days after seedling emergence, 10 kilograms of urea should be applied, and the fertilizer should be applied every 8-10 days, generally 4 times, 10-12 kilograms of urea per mu.
With the increase of celery plants, fertilizer should be increased.Spray 2~3 times of instant borax fertilizer or calcium superphosphate leaching solution in the early stage of summer celery growth, which can prevent petiole cracking, heart rot, and late petiole yellowing.In the middle and late stage of the growth of celery, spraying a mixture of potassium dihydrogen phosphate at 500 times and "920" at 1000 times on the leaf surface can significantly enhance the anti-disease ability of celery plants, effectively improve the yield and quality.The growth and development of summer celery requires moist environmental conditions. During the period from planting to harvest and marketing of celery, the field should be kept moist and the furrow should be kept under constant water to facilitate the growth of stems and leaves.