The following experiment on cucumber (Cucumis sativus L.) took place in the fall of 2021–2022 at the unheated greenhouse of the Ministry of Agriculture, Iraq. The experiment included two coefficients and three replications consisting of compatibility between two cucumber cultivars, Sayff and Fito, and four Atonik concentrations (0, 2.5, 3.5, and 4.5 ml L-1). The research aimed to know the effect of Atonik on the cucumber’s physical and biochemical properties for cultivation in the Southern Region, Dhi-Qar Governorate, Iraq. The cultivar Sayff emerged considerably superior in plant height, stem diameter, the number of leaves, and fruits’ total soluble carbohydrates from the leaves (156.86 cm, 0.486 mm, 40.825 leaves plant-1, and 6.511 mg g-1, respectively), except in the fruit content of vitamin C, which was highest in the cultivar Fito (91.25 mg 100 g-1 fresh weight). The foliar application of Atonik (4.5 ml L-1) considerably improved the morphological traits and biochemical composition of cucumbers. It provided the supreme rates of plant height, stem diameter, the number of leaves, total soluble carbohydrate content in fruits, and vitamin C (158.04 cm, 0.491 mm, 41.049 leaves, 6.818 mg g-1, and 96.19 mg 100 g-1 in fresh weight, respectively), as compared with the control treatment.
Cucumber (C. sativus L.), cultivars, Atonik, morphological traits, physical and biochemical properties
In cucumber (C. sativus L.), the foliar application of Atonik (4.5 ml L-1) considerably improved the morphological traits and biochemical composition and provided the highest rates of plant height, stem diameter, the number of leaves, total soluble carbohydrate content in fruits, and vitamin C.