Fertilization method of celery in greenhouse
Every 50 kilograms of celery requires 20 grams of nitrogen, 7 grams of phosphorus and 30 grams of potassium. In addition, celery has a strong need for boron, and the plant is prone to heart rot when boron is deficient. According to the growth characteristics and fertilizer requirement characteristics of celery, the fertilization techniques are as follows:
1. Base fertilizer: on the basis of full application of organic fertilizer, 1520 kg of phosphate and potassium nitrate fertilizer is applied per mu.
two。 Topdressing: after squatting seedlings, apply 20 kg nitrophosphate fertilizer per mu, then apply 20 kg nitrophosphate fertilizer every 20 days, and stop topdressing 20 days before harvest. Pang Qiujuan
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