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Plasticity in nitrogen form uptake and preference in response to long-term nitrogen addition of the main tree species in a temperate old growth forest.
- Source :
- Scandinavian Journal of Forest Research; 2024, Vol. 39 Issue 2, p127-137, 11p
- Publication Year :
- 2024
-
Abstract
- We conducted a short-term field hydroponic <superscript>15</superscript>N labeling experiment to study the effects of different nitrogen (N) addition treatment on the N uptake preference and rate of plant fine roots in a temperate old growth forest in 2018. The results indicated that the N preference of dominant tree species for different N chemical forms was not influenced by the N addition, with the N acquisition pattern being ammonium > nitrate > glycine. However, N addition altered the plant's N uptake rates. Under low N treatment, the uptake rates of glycine for three target tree species significantly increased. Both low and medium N additions significantly enhanced the NH<subscript>4</subscript>–N uptake rate, but had little impact on the NO<subscript>3</subscript>–N uptake rate. Conversely, high N addition exerted negative effects on NO<subscript>3</subscript>–N and NH<subscript>4</subscript>–N uptake rate. Different tree species may flexibly adapt to new environmental conditions by adapting to their root morphology and the relationship between plant growth and N uptake. N addition has pronounced effects on N uptake rate and root morphology traits of dominant tree species. Overall, this study contributes to a deeper understanding of the response of N uptake patterns in temperate forests to long-term N addition. [ABSTRACT FROM AUTHOR]
- Subjects :
- OLD growth forests
TEMPERATE forests
NITROGEN
SPECIES
TREES
MICROBIAL inoculants
Subjects
Details
- Language :
- English
- ISSN :
- 02827581
- Volume :
- 39
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Scandinavian Journal of Forest Research
- Publication Type :
- Academic Journal
- Accession number :
- 175639252
- Full Text :
- https://doi.org/10.1080/02827581.2023.2299455