Fertiliser application through irrigation water in greenhouse crops, as well as the use of groundwater with high salt concentration, has been the cause of increasing soil salinity, leading to an expressive yield reduction. The yield of grafted cucumber in greenhouse when irrigated with waters of different electrical conductivity was evaluated (S1=1.54; S2=3.10 and S3=5.20 dS.m-1) and two irrigation water depths associated to their application frequencies (L0=1.00.ETc; L1F1=1.25.ETc in all irrigation and L1F2=1.25.ETc when the irrigation water depth of L0 reached 100 mm), where ETc is the crop evapotranspiration. The trial was conducted in completely randomised blocks in a 3x3 factorial scheme. The number of marketable fruits per plant decreased linearly with salinity increase, while total and marketable yield, as well as the total fruit number per plant and fruit dry matter were not affected by salinity, even though all of them showed a reduction tendency with the increase in the salinity of the water. The different irrigation water depths were not sufficient enough to alleviate salt stress, independently of their application frequency.
Cucumis sativus L.; greenhouse; salinity
