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Changes in phosphorus concentration in needles of adult Norway spruce - nutrient re-translocation or dilution effect?

Authors
  • Manghabati, Hadi1
  • Weis, Wendelin2
  • Göttlein, Axel1
  • 1 Technische Universität München, Fachgebiet Waldernährung und Wasserhaushalt, Hans-Carl-von-Carlowitz-Platz 2, Freising, 85354, Germany , Freising (Germany)
  • 2 Bayerische Landesanstalt für Wald und Forstwirtschaft, Abteilung 2 Boden und Klima, Hans-Carl-von-Carlowitz-Platz 1, Freising, 85354, Germany , Freising (Germany)
Type
Published Article
Journal
European Journal of Forest Research
Publisher
Springer Berlin Heidelberg
Publication Date
Mar 22, 2019
Volume
138
Issue
3
Pages
539–546
Identifiers
DOI: 10.1007/s10342-019-01188-0
Source
Springer Nature
Keywords
License
Yellow

Abstract

Regarding the low availability of phosphorus in soil, tree internal cycling of phosphorus through re-translocation among needles would be a good strategy for conifers to cope with soil phosphorus deficiency and to support new needles in annual growth. Therefore, the relationship between the amount of plant-available phosphorus in the soil and the differences in concentrations of phosphorus among first- and second-year needles (P-difference Ny1 − Ny2) of adult Norway spruce was examined. No significant correlation could be detected between the stocks of available phosphorus extracted using citric acid and P-difference Ny1 − Ny2, even for trees with deficient nutritional status. The temporal variations of P-difference Ny1 − Ny2 at single plots showed the same order of magnitude as the variability between plots. The typically lower concentrations of phosphorus in second-year needles result mainly from an increase in needle weight of older needles. The net phosphorus re-translocation into younger needles appears to be of minor importance.

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