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Celery soil testing and formula fertilization technology
Celery The production of 1000 kg of celery requires 2 kg of nitrogen, 1 kg of phosphate fertilizer (diphosphorus pentoxide) and 4 kg of potassium fertilizer (potassium chloride). Before planting, 5,000 kg of high-quality farmyard manure and 40 kg of phosphate fertilizer were applied. When the height is 10 cm, the first top dressing starts, and the mud is applied with 7-10 kg of nitrogen fertilizer and 10-15 kg of potassium fertilizer. Celery enters the vigorous growth period, chasing fertilizer once every 7 to 10 days, chasing 3 to 4 times, applying 15-20 kg of nitrogen fertilizer per acre, 10-20 kg of phosphate fertilizer, and 20-25 kg of potassium fertilizer. Each time the top dressing should be combined with watering. It can also be combined with disease prevention with 0.3% concentration of spray Shibao for foliar application.
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