Considering the salinity problem and limited water resources in Iran, joint application of salinity moderators and super absorbents, can be an effective approach to improve the growth indexes of plants, grown in saline soils. For investigating the eff
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Considering the salinity problem and limited water resources in Iran, joint application of salinity moderators and super absorbents, can be an effective approach to improve the growth indexes of plants, grown in saline soils. For investigating the effects of salicylic acid and pumice on yield and nutrients content in Cress (Lepidium sativum) in a saline soil, a field experiment was conducted in a factorial form on completely randomized design with nine treatments and three replications. The factors were 1) salicylic acid (s) including three rates, consists of a) no amendment (control), b) soaking seeds in salicylic acid 0.1 mM for 24 h and c) spraying plants by salicylic acid 0.7 mM in three stages and 2) pumice (p) including three rates, consists of a) 0 (p0), b)15 T/ha (p1) and c) 30 T/ha (p2). Results showed that seeds soaking in salicylic acid 0.1 mM could moderate the negative effects of salinity in Cress. But there was not a significant difference between spraying plants by salicylic acid 0.7 mM and control, in most growth indexes. Increasing pumice rate, increased Dw and P, Ca, Mg and K content and reduced Na content, prolin, H2O2 and ascorbat peroxidase in Cress. Totally P2S1 treatment or application of 30 T/ha pumice and soaking seeds in salicylic acid 0.1 mM, produced the most Dw and nutrients content and the leastsalinity stress indexes in Cress.
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