Soilless Cultivation System, Electrical Conductivity of Nutrient Solution, and Growing Season on Yield and Quality of Baby-Leaf Oak-Leaf Lettuce

The floating system (FL) is a common soilless method for baby-leaf production, whereas the ebb and flow (EF) has been proposed as an alternative. Both of them allow managing plant saline stress while preventing reduction in growth yield increasing product quality. oak-leaf lettuce response to growing conditions (hydroponics, salinity) interaction with climate genotype little studied. Two experiments were carried out two cultivars (green- red-colored type) grown FL EF systems at levels nutrient solution (NS) electrical conductivity (EC) (EC = 2.5 3.5 dS m−1; EC2.5, EC3.5, respectively) under autumn late-spring conditions. caused increase salinity substrate where roots mainly develop, so it overcomes effect EC3.5 treatment. In cycle, irrespective EC, EF-grown plants had improved leaf thickness (specific area), color, antioxidative (total phenol carotenoid contents) properties; however, was observed most productive cultivar (green type). late spring, higher quality (processability, nitrate content) obtained expense showing best productivity green type cultivar. red dry mass, phenol, concentrations.