EC Sensitivity of Hydroponically-Grown Lettuce (Lactuca sativa L.) Types in Terms of Nitrate Accumulation

The goal of this research was to investigate the effect electrical conductivity (EC) levels nutrient solution on fresh weight, chlorophyll, and nitrate content hydroponic-system-grown lettuce. selected cultivars are most representative commercial varieties grown for European markets. Seven (‘Sintia,’ ‘Limeira,’ ‘Corentine,’ ‘Cencibel,’ ‘Kiber,’ ‘Attiraï,’ ‘Rouxaï’) three Lactuca sativa L. types’ (butterhead, loose leaf, oak leaf) were in a phytotron rockwool, meanwhile EC level solutions different: normal (<1.3 dS/m) high (10 dS/m). plants saline condition had lower yield but elevated chlorophyll level, although ‘Limeira’ ‘Cencibel’ reduced levels. results special characteristic lollo-type showed that could be very different due salinity (‘Limeira’ lowest (684 µg/g weight (FW)) highest (4396 FW)). There moderately strong negative correlation (?0.542) reverse ratio among contents treated with value, while relationship not shown condition. Under condition, acted differently, all examined stayed under permitted total (5000 FW).