Abstract: In order to investigate the effects of chemical fertilizer reduction on the growth and soil properties of celery in greenhouse, the application of 100% chemical fertilizer, 10% chemical fertilizer reduction, 25% chemical fertilizer reduction and 35% chemical fertilizer reduction treatments were studied on the basis of organic fertilizer application. Changes in growth physiology and soil nutrients of celery in daylight greenhouses were studied. The test results showed that, in the case of applying organic fertilizer, compared with traditional fertilization, the reduction of chemical fertilizer to 35% had little effect on the total nutrient of the soil, and the difference between the treatments of total nitrogen, total phosphorus, total potassium and organic matter was not significant; soil nitrate nitrogen and available phosphorus were still at a high level after different fertilization treatments; in the fertilizer reduction of 25% and 35% treatments soil available potassium was significantly lower than that of 100% chemical fertilizer treatment; the effect of fertilizer reduction on soil bulk density and pH was not significant; large and high-quantity fertilizer significantly increased soil EC values; celery plant height, leaf nitrogen, chlorophyll content and yield between 100% chemical fertilizer application and chemical fertilizer reduction application were not significantly different.

Key words: reduction of chemical fertilizer, celery, growth, soil properties