Partitioning of remobilised N in young beech (Fagus sylvatica L.) is not affected by elevated [CO2]

Abstract : Effects of elevated CO2 concentration ([CO2]) on the remobilisation of tree internal nitrogen (N) of 3-year-old beech (Fagus sylvatica L.) was determined in a labeling experiment. Trees were pre-treated with 15N for 1 year and the remobilization of stored N was monitored in ambient (350 ppm) or elevated [CO2] (700 ppm) in the subsequent year. N taken up during the pre-treatment made up 24.7% of total N at the start of the experiment. This value was almost halved after 24 weeks of growth for both CO2-treatments. Significant differences in the partitioning of the remobilized N were only observed transiently after 6 weeks of growth but no CO2-effect was observed at the end of the growing season.
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Jens Dyckmans, Heiner Flessa. Partitioning of remobilised N in young beech (Fagus sylvatica L.) is not affected by elevated [CO2]. Annals of Forest Science, Springer Verlag/EDP Sciences, 2005, 62 (3), pp.285-288. ⟨hal-00883884⟩

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