Root rot is the most common problem in greenhouse cucumber production, which has been worsening year by year in some areas in recent years, seriously affecting cucumber yield and the economic benefits of vegetable farmers. 

Water soluble fertilizer, also known as water-soluble fertilizer (WSF), is a type of multi-component compound fertilizer that can be completely dissolved in water.

The combination of humic acid and nitrogen fertilizer can reduce nitrogen fertilizer loss and improve nitrogen fertilizer utilization efficiency; 

China's agricultural resources are in short supply, over exploitation and increasing pollution. How to ensure the effective supply, quality and safety of agricultural products under the constraints of resources and environment and improve the ability of agricultural sustainable development is a major challenge that must be dealt with.