Articles
INFLUENCE OF FERTIGATION WITH NITROGEN ON GROWTH AND CROPPING OF ‘JONAGOLD’ APPLE TREES
Article number
636_80
Pages
647 – 650
Language
English
Abstract
The trial was conducted in a Jonagold/M9 orchard (2500 trees/ha) and the experiment was designed as a split-block comprising five treatments (fertigation with 45 kg N/ha, 60 kg N/ha, 120 kg N/ha, irrigation without fertilisers, and control – without irrigation and without fertilisers). The treatments were imposed beginning in the second year after planting and lasted seven years (1992-1998). Fertigation with different amounts of nitrogen had no consistent effect on tree growth, cumulative yield and yield efficiency, however, treatments had a significant influence on regularity of bearing.
The index of alternate bearing varied with treatment.
However, these results demonstrated that the natural tendency of Jonagold to alternate bearing could not be broken sufficiently by the different rates of nitrogen applied by fertigation.
The index of alternate bearing varied with treatment.
However, these results demonstrated that the natural tendency of Jonagold to alternate bearing could not be broken sufficiently by the different rates of nitrogen applied by fertigation.
Authors
Z. Cmelik, S. Tojnko
Keywords
Malus x domestica, mineral nutrition, trunk cross sectional area, yield efficiency, alternate bearing
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