The efficiency of seven different hydroponic solutions was evaluated on the yield of six lettuce cultivars (Aurora, Lívia, Regina, Brisa, Mimosa and Verônica). The experiment was performed from October to December 1998, in a randomized blocks designed with two replications. The nutrient solution recommended by Ueda was analyzed in its complete formulation (100%), and Castellane & Araujo; Furlani; and Bernardes in its complete and half formulation of nutrients concentration (100% and 50%). The nutrient solutions recommended by Castellane & Araujo; and Furlani, without dilution (100%), resulted in higher yield. The use of Ueda nutrient solution resulted in the lowest yield, even when compared with diluted solutions (50%). Regina and Mimosa cultivars presented the best performance and Aurora the worst one.
Lactuca sativa; soilless culture; hydroponic conditions
