In order to evaluate the effects of Cl- / So42- ionic ratios at different salinities and N amounts on wheat, a greanhouse experiment was conducted. A factorial experiment based on a completely randomized design with three replications was carried out. The factors were including three Cl-/So42- ratios [ R1(Cl-/So42- =1/2), R2(Cl-/So42- =1/1) and R3(Cl-/So42- =2/1)], two levels of Nitrogen [N1(100KgN/ha) and N2(200KgN/ha)] and three levels of salinity [S1(2dS/m), and S2(4dS/m) S3(8dS/m)]. Germination percentage, height and dry matter weight of the plants were used for evaluation the tolerance of wheat against salinity, Cl- / So42- ratios and also the effect of N fertilizer. Comparison of the interaction effects between N fertilizer and Cl- / So42- ionic ratios showed that an increasing in N fertilizer amounts in soils had R1 and R2 ratios could engender positive effects on dry matter weight , while in R3 increase of N fertilizer in reaction to disruptive effects of excessive Cl- didn’t show significant effect on dry matter weight. Regarding to interaction effects between N , Cl- / So42- ratios and salinity it seems that use of more N in order to stimulate plant growth and it’s development and to prevent of salinity stresses can be more useful in saline soils which their main anionic type is So42- and their anionic varieties are including the Cl-/So42- ratios of 1/1 and 1/2.

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