Effect of cultivars, compost, humic acid and their interactions on leaf heavy metal accumulation of sweet cherry (Prunus avium L.)‎

الملخص EN

The present study was carried out on sweet cherry tree (Prunus avium L.), during the growing season of (2012-2013) on private orchard of sweet cherry tree, located in the Bibad village near Amadi town / Duhok governorate- Kurdistan region-Iraq.

The field experiment was done in the orchard that contained two cultivars of sweet cherry (“Nefertity” and “Berlit”).

The application of compost was done in December 25th 2012, at (0, 2, 4 and 6 kg.Tree-1), foliar spray of humic acid done at (0, 100, 200 and 300 mg.L-1) and repeated after two weeks.

The results are summarized as follows: Nefertity cultivar significantly dominated over Berlit cultivar in leaf Cd, Pb and Fe content.

Whereas Berlit cultivar dominated in leaf (Ca, and Zn).

Compost specially at kg.Tree-1 has significantly improved leaf Cd and Fe.

Whereas, compost at 6 kg.Tree-1 in leaf nutrient content Cd and Fe.

Humic acid specially at 300 mg.L-1 has significantly increased the leaf nutrients content Ca, Cd, Zn and Fe, while, 200 mg.L-1 increased the leaf Cd, Pb and Zn.

The interactions between cultivars, compost and humic acid has affected significantly most of the studied parameters.

The more effective treatment interactions was Nefertity + 6 kg.Tree-1 of compost plus300 mg.L-1 of humic acid increased Cd significantly