Celery Soil Testing and Formula Fertilization Technology

The production of 1000 kg of celery requires 2 kg of pure nitrogen, 1 kg of phosphorus pentoxide and 4 kg of potassium chloride. Before the planting, Mushi quality farmyard fertilizer 5000 kg, phosphate fertilizer 40 kg. When the height of the plant is 10 cm, the first time, the top dressing is applied. The mu topdressing nitrogen fertilizer is 7 to 10 kg, and the potassium fertilizer is 10 to 15 kg. Celery into the vigorous growth period, every 7 to 10 days topdressing 1 fertilizer, a total of 3 to 4 times, topdressing 15 to 20 kg of nitrogen fertilizer per acre, phosphate fertilizer 10 to 20 kg, potassium 20 to 25 kg. Each topdressing should be combined with watering, but also can be combined with the prevention of disease with 0.3% concentration spray Shi Bao spraying.

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