HEBEL JUNIOR, Celso.; REZENDE, Roberto.; FREITAS, Paulo Sérgio Lourenço de.; GONÇALVES, Antonio Carlos Andrade.; FRIZZONE, José Antonio.
Résumé:
The experiment was conducated in greenhouse in the unit of research in irrigated
agriculture of the State University of Maringá. The porpuse in this work went study the effect the different
nutrient solutions apply in two outflow in the hidroponic yeld of the lettuce (Lactuca sativa L.), cultivated
by the system NFT (Nutrient Film Technique). The treatments consist of three nutrients solutions with
different concentrations (Solution 1=1,2dS.m-1, Solution 2=2,5dS.m-1 e Solution 3=0,8dS.m-1) combined
with two outflow of application (Outflow 1=1,2 L.min-1 and Outflow 2=0,8 L.min-1 ) in the canals of
cultivation.. So were compound the following treatments: S1V1 Nutrient solution 1 applicated in
outflow 1, S1V2 Nutrient solution 1 applicated in outflow 2, S2V1 Nutrient solution 2 applicated in
outflow 1, S2V2 - Nutrient solution 2 applicated in outflow 2, S3V1 - Nutrient solution 3 applicated in
outflow 1, S3V2 - Nutrient solution 3 applicated in outflow 2. The analysis in results permit to conclude
what the factories nutrient solution and outflow not show significant interation and that the largest values
avaluated of biomass fresh and diameter of stem was obtained in treatment solution 1 (CE= 1,2 dS.m-1).
