Using Anti-Stress Compounds as Spray on Cucumber Plants Grown Under Greenhouses to Mitigate the Effects of Water Deficit

Document Type : Original Article

Author

Horticulture Department, Faculty of Agriculture, Benha University, Egypt.

Abstract

Water and nutrients are vital environmental factors affecting cucumber growth and productivity. This study, conducted at the Vegetable Research Farm, Faculty of Agriculture, Benha University, during 2022/2023 and 2023/2024, examined the effects of water deficit and foliar anti-stress treatments on growth, chemical composition, and yield of cucumber (var. Bright VZ). Three irrigation levels (100%, 80%, 60% of water needs) were applied using the Class A evapotranspiration method. Foliar sprays included potassium silicate (2 mL/L), salicylic acid (0.5 g/L), calcium + boron (2 mL/L), and a control (tap water). Reduced irrigation negatively affected vegetative growth (plant height, leaves number, fresh and dry weights) and yield traits (total yield, fruit count, water use efficiency), especially at 60%. No significant differences appeared between 100% and 80% irrigation for leaf number, average fruit weight, diameter, or length. The 80% level yielded the highest N, P, K, Ca, and B in tissues. While fruit quality was mostly stable, TSS increased under 60% irrigation. Moderate deficit (80%) did not harm growth or yield and, combined with potassium silicate or salicylic acid, improved outcomes.

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