Publikation: Nitrogen uptake capacity of European beech (Fagus sylvatica L.) only partially depends on tree age
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Nitrogen (N) acquisition is a major factor determining the processes and mechanisms involved in tree productivity, development, and competitiveness. However, only few studies have investigated changes in N capturing with tree age. We conducted 15N incubation experiments to quantify inorganic (i.e. ammonium and nitrate) and organic (i.e. glutamine-N and arginine-N) net N acquisition capacity of beech trees of five age classes. Our results showed no general pattern, but that net N uptake capacity was rather N source-specific. Inorganic and glutamine-N uptake did not differ between age classes at all. Arginine-N uptake was highest in the youngest and oldest stands reflecting a high N demand by seedlings for root foraging and biomass production despite low internal N storage capacities and by older trees for storage and reproduction. Organic N was preferred over inorganic N regardless of tree age. Overall, our study shows the high significance of organic N sources for N acquisition in beech trees.
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SIMON, Judy, Silvija BILELA, Heinz RENNENBERG, 2021. Nitrogen uptake capacity of European beech (Fagus sylvatica L.) only partially depends on tree age. In: Trees : Structure and Function. Springer. 2021, 35(5), pp. 1739-1745. ISSN 0931-1890. eISSN 1432-2285. Available under: doi: 10.1007/s00468-021-02190-zBibTex
@article{Simon2021-10Nitro-54466, year={2021}, doi={10.1007/s00468-021-02190-z}, title={Nitrogen uptake capacity of European beech (Fagus sylvatica L.) only partially depends on tree age}, number={5}, volume={35}, issn={0931-1890}, journal={Trees : Structure and Function}, pages={1739--1745}, author={Simon, Judy and Bilela, Silvija and Rennenberg, Heinz} }
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 development, and competitiveness. However, only few studies have investigated changes in N capturing with tree age. We conducted 15N incubation experiments to quantify inorganic (i.e. ammonium and nitrate) and organic (i.e. glutamine-N and arginine-N) net N acquisition capacity of beech trees of five age classes. Our results showed no general pattern, but that net N uptake capacity was rather N source-specific. Inorganic and glutamine-N uptake did not differ between age classes at all.
 Arginine-N uptake was highest in the youngest and oldest stands reflecting a high N demand by seedlings for root foraging and biomass production despite low internal N storage capacities and by older trees for storage and reproduction. Organic N was preferred over inorganic N regardless of tree age. Overall, our study shows the high significance of organic N sources for N acquisition in beech trees.</dcterms:abstract> <dc:language>eng</dc:language> <dc:creator>Simon, Judy</dc:creator> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/54466/1/Simon_2-1b38jgntrxah21.pdf"/> <dcterms:title>Nitrogen uptake capacity of European beech (Fagus sylvatica L.) only partially depends on tree age</dcterms:title> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-08-02T08:16:05Z</dcterms:available> <dc:contributor>Bilela, Silvija</dc:contributor> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/54466/1/Simon_2-1b38jgntrxah21.pdf"/> <dc:creator>Rennenberg, Heinz</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-08-02T08:16:05Z</dc:date> <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/> <dc:rights>terms-of-use</dc:rights> </rdf:Description> </rdf:RDF>