Chemical changes of a Fluvic Neossol cultivated with tomato and irrigated with saline water

Aiming to evaluate chemical changes of a Fluvic Neossol from Pernambuco's semiarid there were cultivated tree tomato cultivars, irrigated with saline water with two values of sodium adsorption ratio (SAR) and six values of electrical conductivity (EC). The experiment was carried out in polyethylene pots in randomized blocks design with factorial arrangement 3 x 6 x 2 (three tomato cultivars, six values of EC and two SAR) and four replications. The variables studied were: EC, pH, SAR, Ca2+, Mg2+, K+ e Na+ of the saturation extract of soil depending on the cultivar and the EC and SAR of irrigation water. The tomato cultivars used in this study did not promote significant changes in the EC, pH, SAR, Ca2+, Mg2+ e Na+ of saturation extracts of soil. Increasing salinity of irrigation water promotes increases in the EC, Ca2+, Na+, Mg2+ and K+ of saturation extract of soil. Water with SAR of 20 (mmol L-1)0,5 increased the SAR value of the soil saturation extract.