Foliar iron sulphate-organic acids sprays improve the performance of oriental plane tree in calcareous soil better than soil treatments

摘要: Abstract Oriental plane tree (Platanus orientalis) is among the much-used elements of urban decoration in Iran. Many thousands-of-years-old trees are still viable different cities. In recent years, because changes management practices areas, like widespread use asphalt for streets pavement and concrete water canals together with polluted air, growing condition worsened causing a occurrence chlorosis symptoms. this study, we assessed effect foliar sprays (3000 ppm or 6000 ppm humic acid, 4 8 mM malic citric acid l -glutamine control blank treatment) comparison to soil treatments (a localized placement method which mixture sulfur, FeSO4 decomposed manure placed under topsoil standard sequestrene Fe 138 application), improving performance trees. All contained 0.7% as Iron source. The leaf area, SPAD value, thickness trichome presence on leaves, color newly emerged current season shoot growth were recorded. concentration key also determined. Glutamine treated plants showed elevated acquisition boron, manganese, zinc copper. all treatments, chlorophyll index (SPAD) significantly increased compared treatment. Glutamine, superior young leaves. Treatments containing glutamine had more trichomes surface necrosis was reduced by applied treatments. Sequential Equations Modeling (SEM) used examine path noted responses