Abstract: In response to the problem of excessive chemical fertilizer application in the production of facility melon and fruit vegetables, the effects of three chemical fertilizer reduction techniques on cucumber yield and quality were investigated by field plot trials in the main production areas of facility melon and fruit vegetables in Wuhan. The chemical fertilizer reduction techniques included soil testing and formula fertilization （T2）, organic fertilizer substitution （T3）, and organic small molecule water soluble fertilizer water integration （T4）. The study showed that compared with farmers' customary fertilizer application treatment （T1）, the T2 treatment increased yield by 11.14% per 667 m², T3 treatment increased yield by 8.95% per 667 m², and T4 treatment reduced yield by 0.41% per 667 m². All fertilizer reduction techniques significantly increased the soluble sugar, protein and VC content and reduced the nitrate content of cucumber, with the best nutritional quality of cucumber in T3 and T4 treatments. In terms of cumulative nutrient uptake of nitrogen, phosphorus and potassium in cucumber, T3 treatment was the highest. Under the conditions of this experiment, organic fertilizer substituted 30% of chemical fertilizer technology was the most effective.

Key words: facility cucumber, chemical fertilizer reduction, organic fertilizer substitution, yield, quality