The trial was carried out at Faculdade de Ciências Agronômicas in Botucatu, Brazil. Cucumber plants (Cucumis sativus L.) grafted on squash (Cucumis sp.) were cultivated in hydroponic solution to study the effect of three potassium levels (45; 90; 180 and 360 mg.L-1 K) on growth and yield of grafted and non grafted cucumber plants. There was no effect of plant height, but grafting and potassium level altered flowering outset. Grafted plants fertilized with 45 mg.L_1 K produced 39% more fruits than non grafted ones, and produced 144% more fruits when fertilized with 360 mg.L-1 K. The lowest K level studied (45 mg.L_1 K) was enough to obtain high yield.
Cucumis sativus L; grafting; mineral nutrition; potássium; nutritive solution
