How to fertilize celery in greenhouses? Detailed explanation of scientific fertilization methods
Fertilization methods for celery in greenhouses
For every 50 kg of celery produced, 20 g of nitrogen, 7 g of phosphorus, and 30 g of potassium are required. In addition, celery has a relatively high demand for boron; when boron is deficient, plants are prone to heart rot. Based on the growth characteristics and nutrient requirements of celery, the fertilization techniques are:
1. Base fertilizer: on the basis of applying sufficient organic fertilizer, apply 15-20 kg of nitric phosphorus potassium fertilizer per mu.
2. Topdressing: after seedling hardening, apply one topdressing of 20 kg of nitric phosphorus fertilizer per mu, then every 20 days apply 20 kg of nitric phosphorus fertilizer by flushing, and stop topdressing 20 days before harvest. Pang Qiujuan