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10.3390/f13081166
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Article

Nitrogen Addition Decreases Rhizodeposition by Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Seedlings and Its Distribution in Soil Aggregates

by
Bohan Chen
1,2,†,
Jiao Wang
1,2,†,
Xuan Duan
3,
Fengxia Zhao
3,
Weidong Zhang
1,4,
Xin Guan
1,4,
Longchi Chen
1,4,
Qingkui Wang
1,4,
Silong Wang
1,4 and
Qingpeng Yang
1,4,*
1
Huitong Experimental Station of Forest Ecology, Key Laboratory of Forest Ecology and Management (CAS), Institute of Applied Ecology, Chinese Academy of Scienses, Shenyang 110016, China
2
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
3
College of Geographical Sciences, Shanxi Normal University, Taiyuan 030000, China
4
Huitong National Research Station of Forest Ecosystem, Hunan Key Laboratory for Structure and Ecosystem Service of Subtropical Forest, Huaihua 418307, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Forests 2022, 13(8), 1166; https://doi.org/10.3390/f13081166
Submission received: 11 June 2022 / Revised: 20 July 2022 / Accepted: 21 July 2022 / Published: 23 July 2022
(This article belongs to the Special Issue Plant Effects on Soil Carbon Stabilization in Forests: Patterns, Processes and Mechanisms)
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Abstract

Rhizodeposition-derived carbon plays an important role in plant nutrient acquisition and soil carbon sequestration. However, how nitrogen deposition affects the distribution of rhizodeposition-derived carbon into aggregate classes (macrogagregates, microaggregates, and silt and clay) is unclear. We conducted a nitrogen addition experiment on Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) seedlings with continuously labeled 13CO2 for 120 days. Plant growth and the distribution of rhizodeposition-derived carbon into aggregate classes were assessed. Results showed that nitrogen additionconsiderably increased the ratio of aboveground to belowground biomass, but not aboveground and belowground biomass. Compared with the control, nitrogen addition resulted in a significantdecreaseby 52% inrhizodeposition-derived carbon in bulk soil.We found that more rhizodeposition-derived carbon was incorporated into macroaggregate, followed by microaggregate, and silt and clay regardless of nitrogen addition. The rhizodeposition-derived carbon was significantly decreased by 40% in macroaggregate, 60% in microaggregate, and 61% in silt and clay after nitrogen addition. Nitrogen addition and aggregate classes had no interactive effect on the rhizodeposition-derived carbon. Our results suggest that nitrogen deposition decreases the rhizodeposition of Chinese fir and its distributionin aggregate classes.
Keywords: nitrogen deposition; aggregates; root exudate; carbon isotopic labeling; Chinese fir nitrogen deposition; aggregates; root exudate; carbon isotopic labeling; Chinese fir

Share and Cite

MDPI and ACS Style

Chen, B.; Wang, J.; Duan, X.; Zhao, F.; Zhang, W.; Guan, X.; Chen, L.; Wang, Q.; Wang, S.; Yang, Q. Nitrogen Addition Decreases Rhizodeposition by Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Seedlings and Its Distribution in Soil Aggregates. Forests 2022, 13, 1166. https://doi.org/10.3390/f13081166

AMA Style

Chen B, Wang J, Duan X, Zhao F, Zhang W, Guan X, Chen L, Wang Q, Wang S, Yang Q. Nitrogen Addition Decreases Rhizodeposition by Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Seedlings and Its Distribution in Soil Aggregates. Forests. 2022; 13(8):1166. https://doi.org/10.3390/f13081166

Chicago/Turabian Style

Chen, Bohan, Jiao Wang, Xuan Duan, Fengxia Zhao, Weidong Zhang, Xin Guan, Longchi Chen, Qingkui Wang, Silong Wang, and Qingpeng Yang. 2022. "Nitrogen Addition Decreases Rhizodeposition by Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Seedlings and Its Distribution in Soil Aggregates" Forests 13, no. 8: 1166. https://doi.org/10.3390/f13081166

APA Style

Chen, B., Wang, J., Duan, X., Zhao, F., Zhang, W., Guan, X., Chen, L., Wang, Q., Wang, S., & Yang, Q. (2022). Nitrogen Addition Decreases Rhizodeposition by Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Seedlings and Its Distribution in Soil Aggregates. Forests, 13(8), 1166. https://doi.org/10.3390/f13081166

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