Articles
STUDY OF THE EFFECT OF NITROGEN FERTILIZATION SUPPLIED BY FOLIAR SPRAYS OR BY FERTIGATION IN APPLE TREES – PRELIMINARY RESULTS
Article number
868_37
Pages
287 – 292
Language
English
Abstract
Nitrogen overfertilization of Golden Reinders apple trees, applied as extra doses to the soil or as a foliar aqueous solution led to different effects on plants.
While soil applications had no effects on growth and cropping parameters, as compared with the control trees, foliar sprays promoted shoot growth and leaf extension, and resulted in a decrease in yield and crop-load, presumably due to a greater preharvest fruit drop.
Phytotoxic damage was observed on leaves, but net photosynthesis remained unaffected, and mineral element concentration did not change due to the overfertilization, except for N, which increased only in the foliar spray treatment, and only late in the growing season.
While soil applications had no effects on growth and cropping parameters, as compared with the control trees, foliar sprays promoted shoot growth and leaf extension, and resulted in a decrease in yield and crop-load, presumably due to a greater preharvest fruit drop.
Phytotoxic damage was observed on leaves, but net photosynthesis remained unaffected, and mineral element concentration did not change due to the overfertilization, except for N, which increased only in the foliar spray treatment, and only late in the growing season.
Authors
J.L. Parés, E. Monge, A. Blanco, J. Val, J.L. Espada
Keywords
Malus × domestica, fruit quality, mineral nutrition, yield
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