Influence of synthetic zeolites fertilization on Leccino olive leaf mineral composition

Na alkalnim, karbonatnim tlima, zbog formiranja teško topivih spojeva, smanjena je dostupnost cinka (Zn), mangana (Mn), i željeza (Fe). Razlog tomu je pored visokog pH i visoka koncentracija aktivnog vapna u tlu koje blokira primanje navedenih hraniva. Cilj ovog istraživanja bio je utvrditi utjecaj gnojidbe sintetskim zeolitima na mineralni sastav lišća masline Olea europaea L. sorte Leccino uzgajane na alkalnom, karbonatnom tlu. U tu svrhu provedeno je istraživanje, u vegetacijskoj komori, u trajanju od 200 dana. Gnojidba Zn, Mn i Fe obavljena je u obliku sintetskog zeolita A (ZA), u kojem su ionskom zamjenom Na ioni zamijenjeni kationima Zn2+, Mn2+ i Fe2+ (Fe3+). Temeljem rezultata istraživanja vidljivo je da je pri tretmanu zeolitima utvrđena statistički značajno veća koncentracija Mn u listu masline dok koncentracije Fe i Zn u listu masline nisu pokazale signifikantnu razliku između tretmana sa ili bez primjene zeolitaDue to the formation of precipitous compounds, availability of Zn, Mn, Fe is reduced in alkaline, calcareous soils. Beside high pH values, high active lime content is the reason for lower uptake of the above mentioned nutrients. Thus, the objective of this trial was to define the impact of synthetic zeolites fertilization on leaf mineral content of olive leaves (Olea europaea L. cv Leccino) grown in the alkaline, calcareous soil. For this purpose, an experiment was conducted in the vegetation chamber, in the period of 200 days. Fertilization with Zn, Mn, Fe was carried out in the form of synthetic zeolite A (ZA), in which the original Na+ ions from zeolite A were exchanged with Zn2+, Mn2+ and Fe2+ (Fe3+) ions from solutions. Results showed that zeolite fertilization significantly increased Mn content in olive leaf, while Fe and Zn leaf concentrations did not show any significant difference between zeolite treated and untreated olives.