Folia Horticulturae

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Effect of bark grafting on growth and flower bud formation on young apple trees in the nursery

Władysław Poniedziałek, Stanisław Porębski, Bernadeta Rzeźnicka

Department of Pomology
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland

The effect of bark grafting on growth and flower bud formation was investigated in the years 1999-2000. Rings of bark from M.9 rootstock, 1.5 cm in width, were grafted on the trunks of young ‘Jonagold’ apple trees in the nursery. The growth of the trees was evaluated and in the next year the number of flower clusters was determined in the orchard.

The bark grafting reduced the trunk cross-section area, the height of the trees, and the cumulative length of shoots on the tree. The grafting enhanced the flower bud formation. For the stimulation of flower bud formation the optimal time of grafting was the period from the 1st to 10th July. An earlier or a later time of bark grafting also stimulated the formation of flower buds, though to a smaller degree than in the control.

Poniedziałek W., Porębski S., Rzeźnicka B., 2000. Effect of bark grafting on growth and flower bud formation on young apple trees in the nursery. Folia Horticulturae 12/2: 63-68.