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.