ISHS Acta Horticulturae 474: III International Symposium on Olive Growing
THE EFFECT OF INORGANIC NUTRIENTS AND ETIOLATION ON THE PROPAGATION OF OLIVE WITH AN IMPROVED METHOD OF MOUND LAYERING |
| Authors: | M. Koukourikou-Petridou, D. Voyiatzis, I. Porlingis |
| Keywords: | Olive, propagation, nutrients, etiolation |
| Abstract:
Stock plants of the olive cvs. Chalkidikis and Kalamon, grown in plastic containers, were severely pruned and the resulting juvenile shoots were used as layers. In all experiments, a complete ring of bark (girdling) and two bands of periderm were removed from the base of each layer, followed by the application of a lanolin/Tween 20 (3:1) paste containing 40 mg IBA/g. The bases of the layers were then covered by a rooting substrate consisting of a mixture of peat/perlite (1:1), held in place by a bottomless plastic pot. Various fertilizers (NH4NO3, P2O5, K2SO4, KNO3, K2SO4, Polyfert-80, XL-60) were applied twice to the substrate surrounding the bases of the layers. Phosphorus increased rooting in some cases. All other nutrients caused a decrease in rooting. In the case of XL-60 this reduction was concentration dependent. Etiolation was applied by covering the bases of the layers, some time before treatment, with either sand or black polyethylene, wrapped around the base of each layer and held in place by aluminum foil. Etiolation by sand caused an increase in the number of roots/layer, but otherwise no significant differences among the three treatments were detected. | |
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