engleski

Leaf mineral concentration of six olive cultivars cultivated on calcareous soil

There are limited numbers of scientific publication regarding genotypic differences which exist among olive cultivars concerning nutrient uptake. For that purpose, the object of our study was to determine possible differences between leaf mineral content of six selected olive cultivars since leaf nutrient analysis is consider being the best method for diagnosing olive tree nutritional status. Plant material was obtained from an olive collection, grown on calcareous soil maintained at Institute of Adriatic Crops and Karst Reclamation, Split, Croatia. The study was conducted with two Croatian autochthonous olive cultivars (Istarska bjelica, Lastovka), two Italian cultivars (Pendolino, Leccino), one Spanish cultivar (Hojiblanca) and one Greek cultivar (Koroneiki). Completely randomized design was applied. Selected olive cultivars in our experiment demonstrated different nutrient leaf concentration, which is of particular importance for fertilization requirements and fertilization practice in Croatian orchards grown on calcareous soil. This study has shown questionably low Mg concentration in all olive cultivars with exception for Hojiblanca cultivar. Also, only Croatian cultivars Istarska bjelica and Lastovka as well as Spanish cultivar Hojiblanca recorded sufficient levels of iron leaf mineral content. Regarding other elements studied (P, K, Ca, Zn, Mn, Cu) all cultivars were above literature cited thresholds for possible deficiencies.

Olive cultivars; mineral nutrition; calcareous soil; Mg; Fe

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