Nitrogen deposition does not alter the temperate forest soil carbon pool: A 14-y experiment on varied nitrogen fertilization.
4 affiliations
- 1Key Laboratory of Forest Ecology and Silviculture, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
- 2College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
- 3Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, MN 55108.
- 4Division of Earth and Climate Sciences, The Nicholas School of the Environment, Duke University, Durham, NC 27710.
Abstract
Soil carbon (C) pools in nitrogen-limited temperate forests are critical to the global C cycle, but there are no long-term experiments examining soil C, with various nitrogen (N) forms. Here, a 14-y experiment (100 kg N ha⁻¹ y⁻¹), with added N simulating atmospheric deposition proportions (~70% inorganic, ~30% organic) did not affect soil C pools, whereas organic N (ON) and inorganic N (IN) individually significantly increased values by 2.7-fold and 1.8-fold, respectively. Although no treatment significantly affected soil pH, treatment effects on pH were negatively associated with soil C pools. In addition, treatments containing ON forms increased mineral-associated organic C fractions, indicating enhanced C stability vs. IN. These findings enhance our understanding of N deposition-soil C pool interactions.
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BibTeX
@article{zhang2026nitrogen,
title = {{Nitrogen deposition does not alter the temperate forest soil carbon pool: A 14-y experiment on varied nitrogen fertilization.}},
author = {Yunyu Zhang and Sarah E Hobbie and William H Schlesinger and Tao Sun},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
year = {2026},
month = oct,
doi = {10.1073/pnas.2626990123},
url = {https://europepmc.org/article/MED/42886702},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Nitrogen deposition does not alter the temperate forest soil carbon pool: A 14-y experiment on varied nitrogen fertilization.
AU - Yunyu Zhang
AU - Sarah E Hobbie
AU - William H Schlesinger
AU - Tao Sun
PY - 2026
DA - 2026/10/16
JO - Proceedings of the National Academy of Sciences of the United States of America
DO - 10.1073/pnas.2626990123
UR - https://europepmc.org/article/MED/42886702
AB - Soil carbon (C) pools in nitrogen-limited temperate forests are critical to the global C cycle, but there are no long-term experiments examining soil C, with various nitrogen (N) forms. Here, a 14-y experiment (100 kg N ha⁻¹ y⁻¹), with added N simulating atmospheric deposition proportions (~70% inorganic, ~30% organic) did not affect soil C pools, whereas organic N (ON) and inorganic N (IN) individually significantly increased values by 2.7-fold and 1.8-fold, respectively. Although no treatment significantly affected soil pH, treatment effects on pH were negatively associated with soil C pools. In addition, treatments containing ON forms increased mineral-associated organic C fractions, indicating enhanced C stability vs. IN. These findings enhance our understanding of N deposition-soil C pool interactions.
SN - 0027-8424
SN - 1091-6490
ER -