Si Supply Could Alter N Uptake and Assimilation of Saplings—A 15N Tracer Study of Four Subtropical Species
Abstract
:1. Introduction
2. Materials and Methods
2.1. Plant Material, Growth Conditions, and Experimental Design
2.2. Plant Samplings and Biomass
2.3. Chemical Analyses
2.4. Calculations
2.5. Statistical Analysis
3. Results
3.1. Plant and Soil Properties
3.2. 15N Enrichment, Uptake, and Assimilation of Saplings
4. Discussion
4.1. Effects of Si Supply on Plant Properties
4.2. Effects of Si Supply on Plants’ N Uptake and Assimilation
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Elements | Si Treatment | P. pubescens | P. bournei | S. superba | C. lanceolata | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Leaf | Stem | Root | Leaf | Stem | Root | Leaf | Stem | Root | Leaf | Stem | Root | ||
Si (g kg−1) | Si + 0 | 28.0 b | 17.2 b | 30.9 b | 6.2 b | 1.7 | 5.3 b | 4.2 | 2.7 | 13.1 | 4.8 | 2.9 a | 14.8 a |
Si + 7 g/m2 | 28.7 b | 19.2 ab | 36.3 ab | 10.0 a | 2.2 | 10.0 ab | 4.8 | 2.6 | 9.5 | 3.8 | 1.8 b | 7.7 b | |
Si + 14 g/m2 | 37.0 a | 21.8 a | 44.8 a | 9.3 a | 2.4 | 16.9 a | 4.7 | 2.3 | 9.7 | 6.6 | 1.4 b | 5.7 b | |
C (%) | Si + 0 | 42.4 a | 45.7 a | 37.1 a | 46.9 | 45.3 | 45.2 | 46.0 | 46.4 | 44.9 | 45.4 | 45.7 | 44.7 |
Si + 7 g/m2 | 41.5 ab | 42.7 b | 37.2 a | 46.7 | 45.2 | 45.6 | 46.5 | 45.5 | 44.8 | 45.8 | 45.6 | 45.2 | |
Si + 14 g/m2 | 41.5 b | 42.7 b | 35.1 b | 46.7 | 45.8 | 45.3 | 46.4 | 45.2 | 44.6 | 45.3 | 45.6 | 45.6 | |
N (%) | Si + 0 | 1.82 | 0.39 | 0.63 | 1.75 a | 0.42 | 1.30 ab | 1.68 a | 0.52 | 0.67 | 1.22 | 0.51 | 0.72 |
Si + 7 g/m2 | 1.78 | 0.43 | 0.60 | 1.52 b | 0.45 | 1.46 a | 1.76 a | 0.55 | 0.72 | 1.26 | 0.54 | 0.78 | |
Si + 14 g/m2 | 1.79 | 0.41 | 0.55 | 1.49 b | 0.41 | 1.22 b | 1.32 b | 0.51 | 0.80 | 1.31 | 0.51 | 0.71 | |
P (g kg−1) | Si + 0 | 0.79 | 0.71 | 0.52 | 0.62 | 0.71 | 0.71 | 0.69 | 0.36 | 0.69 | 0.74 | 0.51 | 0.40 |
Si + 7 g/m2 | 0.57 | 0.35 | 0.53 | 0.52 | 0.35 | 0.69 | 0.73 | 0.52 | 0.84 | 0.66 | 0.46 | 0.39 | |
Si + 14 g/m2 | 0.62 | 0.61 | 0.53 | 0.48 | 0.61 | 0.71 | 0.71 | 0.28 | 0.70 | 0.78 | 0.59 | 0.36 |
Tissue | Species | 1 d | 15 d | 75 d | 100 d | ||||
---|---|---|---|---|---|---|---|---|---|
15NH4NO3 | NH415NO3 | 15NH4NO3 | NH415NO3 | 15NH4NO3 | NH415NO3 | 15NH4NO3 | NH415NO3 | ||
Root | Phyllostachys pubescens | 93.0 (20.6) a | 114.2 (17.2) a | 7.5 (1.5) a | 5.0 (1.5) ab | 1.6 (0.3) a | 2.0 (0.3) a | 1.8 (0.3) a | 1.3 (0.2) a |
Phoebe bournei | 100.4 (9.8) a | 78.7 (7.8) b | 6.7 (0.5) a | 5.9 (0.4) a | 1.1 (0.1) b | 1.2 (0.1) b | 1.1 (0.1) b | 1.0 (0.1) a | |
Schima superba | 50.3 (6.1) b | 44.3 (7.1) c | 3.4 (0.4) b | 2.9 (0.4) c | 0.5 (0.1) c | 0.4 (0.1) c | 0.6 (0.1) c | 0.5 (0.1) b | |
Cunninghamia lanceolata | 55.3 (5.4) b | 58.3 (5.1) bc | 3.9 (0.5) b | 3.8 (0.4) bc | 0.8 (0.1) bc | 0.9 (0.1) b | 0.8 (0.2) bc | 0.5 (0.1) b | |
Leaf | Phyllostachys pubescens | 110.2 (26.4) ab | 157.1 (16.2) a | 10.6 (0.9) a | 9.4 (2.4) | 3.8 (0.7) a | 5.0 (0.7) a | 3.6 (0.3) a | 3.1 (0.3) a |
Phoebe bournei | 125.4 (7.1) a | 111.4 (7.9) b | 10.7 (1.0) a | 8.7 (0.9) | 2.4 (0.2) b | 3.1 (0.2) b | 1.4 (0.1) c | 1.5 (0.2) bc | |
Schima superba | 91.9 (9.9) ab | 82.0 (16.8) bc | 6.0 (0.8) b | 6.7 (0.7) | 1.0 (0.2) c | 1.5 (0.5) c | 1.1 (0.2) c | 0.9 (0.2) c | |
Cunninghamia lanceolata | 81.4 (13.3) b | 69.3 (4.6) c | 6.0 (0.6) b | 5.9 (0.8) | 2.4 (0.4) b | 2.5 (0.3) bc | 2.1 (0.2) b | 1.9 (0.3) b |
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Liu, X.; Tang, X.; Ran, H.; Deng, M.; Song, Q.; Yang, Q.; Huang, D.; Liu, J. Si Supply Could Alter N Uptake and Assimilation of Saplings—A 15N Tracer Study of Four Subtropical Species. Forests 2023, 14, 1353. https://doi.org/10.3390/f14071353
Liu X, Tang X, Ran H, Deng M, Song Q, Yang Q, Huang D, Liu J. Si Supply Could Alter N Uptake and Assimilation of Saplings—A 15N Tracer Study of Four Subtropical Species. Forests. 2023; 14(7):1353. https://doi.org/10.3390/f14071353
Chicago/Turabian StyleLiu, Xiaoyu, Xinghao Tang, Huan Ran, Mengyang Deng, Qingni Song, Qingpei Yang, Dongmei Huang, and Jun Liu. 2023. "Si Supply Could Alter N Uptake and Assimilation of Saplings—A 15N Tracer Study of Four Subtropical Species" Forests 14, no. 7: 1353. https://doi.org/10.3390/f14071353