Nutrient re-translocation of deciduous broad leaved trees grown under different soils in a free air O3 fumigation

抄録

Hypotheses that retranslocation of foliar nutrients in broadleaved deciduous trees is influenced by soil nutrient availability or high ozone concentration were studied with/without free air O3 fumigation for one growing season using seedlings of Birch, Oak, Beech, Willow planted on poor, medium and rich fertility soils, respectively. We will focus on following major questions: Should O3 tolerance rather than sensitive tree saplings be more efficiently retranslocation? Should trees planted on poor rather than rich soils increased net translocation for growth of newly established seedlings? Should Mn concentration be higher in top leaves rather than fallen for its poorly mobile in phloem? Does N retranslocation in beech leaves decrease in response to N supply in soil since the sensitivity of beech to O3 may become greater with increasing amount of soil.