EFFECT OF NITROGEN FERTILIZATION ON GROWTH AND NITROGEN DISTRIBUTION IN 'RED FUJI' APPLE TREES

摘要

The aim of this study was to examine the response of young 'Red Fuji' apple (Malus domestica Borkh.) trees grafted on M. hupenensis Rehd to different levels of nitrogen fertilization. A root dividing system was used. The level of nitrogen fertilization affected growth and physiological processes in 'Red Fuji' apple trees. As the volume of root system treated with nitrogen increased, the density of absorbing roots and hair roots decreased, as did the root/shoot ratio. In nitrogen deficiency, root biomass increased, but root nitrogen content decreased. As nitrogen level and the volume of root system treated with nitrogen increased, shoot growth went up, and root nitrogen also increased slightly.