During the growing summers of 2020 and 2021, two field experiments were conducted at the Sakha Agric. Res. Station farm in Kafr El-Sheikh, Egypt to improve cucumber plant "hybrid Prince" vegetative growth, yield, and quality by using of organic soil amendments (compost) and foliar spray (compost tea), under different levels of mineral fertilizers. Cucumber plants were treated with T1: control (100 % NPK), T2: 100 % NPK + compost, T3: 75 % NPK + compost, and T4: 50 % NPK + compost, T5: 100 % NPK + foliar spray with compost tea, T6: 75 % NPK + foliar spray with compost tea, and T7: 50 % NPK + foliar spray with compost tea in a completely randomized block design with three replicates.
Over the control plant (T1), the application of a combination treatment with 100 % NPK + compost (T2) as soil amendments and 75 % NPK + foliar spray with compost tea (T6) as a foliar spray resulted in significant increases in vegetative growth (leaf area (cm2), leaves dry matter %, and number of female flowers/plant), fruit length (cm), fruit diameter (cm), early and total fruit yield (t fed-1 ), and this was reflected on increased total soluble solids, N, P and K % in leaves as well as chlorophyll content.
So that, 100 % NPK + soil amendments with compost and 75 % NPK + foliar spray with compost tea treatment had a superior effect to improve yield and quality of the cucumber plant.