Response of Photosynthetic Capacity to Nitrogen Addition in Larix gmelinii Trees in Different Crown Classes
Abstract
1. Introduction
2. Results
2.1. Comparison of Photosynthetic Characteristics
2.2. Comparison of Factors Related to Photosynthetic Capacity
2.3. Relationships Between Photosynthetic Capacity and Its Influencing Factors
3. Discussion
3.1. Effects of N Addition on the Photosynthetic Capacity of Suppressed Trees
3.2. Effects of N Addition on the Photosynthetic Capacity of Dominant and Intermediate Trees
3.3. Differences in Photosynthetic Capacity Among Crown Classes
4. Materials and Methods
4.1. Site Description
4.2. Experimental Design
4.3. Measurements of Leaf Gas Exchange
4.4. Measurements of Leaf Traits
4.5. Data Analyses
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Variable | Crown Class | Nitrogen Addition | Crown Class × Nitrogen Addition | |||
---|---|---|---|---|---|---|
F | p | F | p | F | p | |
Pmax | 50.85 | <0.01 | 17.37 | <0.01 | 6.67 | <0.01 |
Vcmax | 32.63 | <0.01 | 14.93 | <0.01 | 3.26 | <0.01 |
Jmax | 8.96 | <0.01 | 9.14 | <0.01 | 2.48 | 0.04 |
Nmass | 8.31 | <0.01 | 17.79 | <0.01 | 3.92 | <0.01 |
Pmass | 17.44 | <0.01 | 1.64 | 0.19 | 0.79 | 0.58 |
N:P | 28.00 | <0.01 | 6.78 | <0.01 | 2.32 | 0.05 |
PNUE | 56.84 | <0.01 | 9.17 | <0.01 | 4.12 | <0.01 |
Chlm | 11.54 | <0.01 | 15.97 | <0.01 | 3.37 | <0.01 |
SLA | 47.50 | <0.01 | 1.84 | 0.15 | 6.18 | <0.01 |
RubisCO | 6.38 | <0.01 | 59.42 | <0.01 | 2.69 | 0.02 |
GS | 1.72 | 0.13 | 41.97 | <0.01 | 3.99 | 0.02 |
GLO | 5.29 | 0.10 | 1.72 | 0.18 | 2.30 | 0.05 |
PEPC | 7.95 | <0.01 | 199.04 | <0.01 | 3.41 | <0.01 |
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Cai, R.; Wang, J.; Zhang, R.; Wang, Q.; Wang, C.; Quan, X. Response of Photosynthetic Capacity to Nitrogen Addition in Larix gmelinii Trees in Different Crown Classes. Plants 2025, 14, 1056. https://doi.org/10.3390/plants14071056
Cai R, Wang J, Zhang R, Wang Q, Wang C, Quan X. Response of Photosynthetic Capacity to Nitrogen Addition in Larix gmelinii Trees in Different Crown Classes. Plants. 2025; 14(7):1056. https://doi.org/10.3390/plants14071056
Chicago/Turabian StyleCai, Ruijia, Jingjing Wang, Rui Zhang, Qinggui Wang, Chuankuan Wang, and Xiankui Quan. 2025. "Response of Photosynthetic Capacity to Nitrogen Addition in Larix gmelinii Trees in Different Crown Classes" Plants 14, no. 7: 1056. https://doi.org/10.3390/plants14071056
APA StyleCai, R., Wang, J., Zhang, R., Wang, Q., Wang, C., & Quan, X. (2025). Response of Photosynthetic Capacity to Nitrogen Addition in Larix gmelinii Trees in Different Crown Classes. Plants, 14(7), 1056. https://doi.org/10.3390/plants14071056