To make celery not hollow, in addition to the use of high quality, good quality solid celery fine varieties, the first is to pay attention to cultivation methods. It has been determined that, under the same conditions as fertilizer and water, celery cultivated in places with strong alkalinity, heavy viscosity, large sand, and serious diseases and pests are prone to hollow disease. Therefore, cultivation of celery should be done in a plot that is rich in organic matter, has strong water retention and fertility, and has good drainage and irrigation conditions. Cultivation of celery indoors, the daytime temperature is 18 °C to 23 °C, do not exceed 25 °C, night 13 °C to 18 °C, not lower than 10 °C, ground temperature to 13 °C to 18 °C is appropriate. The base fertilizer should be applied enough, and the top-dressing fertilizer in the growing season should be mainly available nitrogen fertilizer. The top dressing should be promptly watered without being de-fertilized, and the measures of pouring water with small water and applying thin fertilizer should be adopted. In the vigorous growth period, water supply and fertilizer shall be continuously provided, and fertilizer should be topdressed once every 15 to 20 days. In addition, long-term harvests should be harvested in time. If the harvest period is late, the petioles will age, the ability of the leaves to produce nutrients will decrease, and the roots will lose their absorption capacity. This will cause the parenchyma cells in the petiole to burst due to aging and nutrient deficiencies and form a hollow phenomenon. . Artisic Steel Instrument Cabinet,Instrument Cabinet,Hospital Instrument Cabinet,Hospital Steel Instrument Cabinet NANJING TIANAO MEDICAL INSTRUMENTS MANUFACTURE CO.,LTD. , https://www.tianaomedical.com