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Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings.

Publication ,  Journal Article
Lim, H; Jämtgård, S; Oren, R; Gruffman, L; Kunz, S; Näsholm, T
Published in: Tree physiology
March 2022

Boreal trees are capable of taking up organic nitrogen (N) as effectively as inorganic N. Depending on the abundance of soil N forms, plants may adjust physiological and morphological traits to optimize N uptake. However, the link between these traits and N uptake in response to soil N sources is poorly understood. We examined Pinus sylvestris L. seedlings' biomass growth and allocation, transpiration and N uptake in response to additions of organic N (the amino acid arginine) or inorganic N (ammonium nitrate). We also monitored in situ soil N fluxes in the pots following an addition of N, using a microdialysis system. Supplying organic N resulted in a stable soil N flux, whereas the inorganic N resulted in a sharp increase of nitrate flux followed by a rapid decline, demonstrating a fluctuating N supply and a risk for loss of nitrate from the growth medium. Seedlings supplied with organic N achieved a greater biomass with a higher N content, thus reaching a higher N recovery compared with those supplied inorganic N. In spite of a higher N concentration in organic N seedlings, root-to-shoot ratio and transpiration per unit leaf area were similar to those of inorganic N seedlings. We conclude that enhanced seedlings' nutrition and growth under the organic N source may be attributed to a stable supply of N, owing to a strong retention rate in the soil medium.

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Published In

Tree physiology

DOI

EISSN

1758-4469

ISSN

0829-318X

Publication Date

March 2022

Volume

42

Issue

3

Start / End Page

513 / 522

Related Subject Headings

  • Trees
  • Soil
  • Seedlings
  • Plant Roots
  • Plant Biology & Botany
  • Pinus sylvestris
  • Pinus
  • Nitrogen
  • 4101 Climate change impacts and adaptation
  • 3108 Plant biology
 

Citation

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Lim, H., Jämtgård, S., Oren, R., Gruffman, L., Kunz, S., & Näsholm, T. (2022). Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings. Tree Physiology, 42(3), 513–522. https://doi.org/10.1093/treephys/tpab127
Lim, Hyungwoo, Sandra Jämtgård, Ram Oren, Linda Gruffman, Sabine Kunz, and Torgny Näsholm. “Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings.Tree Physiology 42, no. 3 (March 2022): 513–22. https://doi.org/10.1093/treephys/tpab127.
Lim H, Jämtgård S, Oren R, Gruffman L, Kunz S, Näsholm T. Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings. Tree physiology. 2022 Mar;42(3):513–22.
Lim, Hyungwoo, et al. “Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings.Tree Physiology, vol. 42, no. 3, Mar. 2022, pp. 513–22. Epmc, doi:10.1093/treephys/tpab127.
Lim H, Jämtgård S, Oren R, Gruffman L, Kunz S, Näsholm T. Organic nitrogen enhances nitrogen nutrition and early growth of Pinus sylvestris seedlings. Tree physiology. 2022 Mar;42(3):513–522.
Journal cover image

Published In

Tree physiology

DOI

EISSN

1758-4469

ISSN

0829-318X

Publication Date

March 2022

Volume

42

Issue

3

Start / End Page

513 / 522

Related Subject Headings

  • Trees
  • Soil
  • Seedlings
  • Plant Roots
  • Plant Biology & Botany
  • Pinus sylvestris
  • Pinus
  • Nitrogen
  • 4101 Climate change impacts and adaptation
  • 3108 Plant biology