globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-013-9887-4
Scopus记录号: 2-s2.0-84897453091
论文题名:
The effect of nitrogen addition on soil organic matter dynamics: A model analysis of the Harvard Forest Chronic Nitrogen Amendment Study and soil carbon response to anthropogenic N deposition
作者: Tonitto C.; Goodale C.L.; Weiss M.S.; Frey S.D.; Ollinger S.V.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期:2018-02-03
起始页码: 431
结束页码: 454
语种: 英语
英文关键词: Carbon storage ; Decomposition ; Forest ecosystem ; Nitrogen cycle ; Nitrogen deposition ; PnET model ; Soil organic carbon ; Soil organic matter
Scopus关键词: anthropogenic effect ; atmospheric deposition ; forest ecosystem ; geoaccumulation ; measurement method ; nitrogen cycle ; numerical model ; soil amendment ; soil carbon ; stand structure ; Harvard Forest ; Massachusetts ; United States ; Pinus resinosa
英文摘要: Recent observations indicate that long-term N additions can slow decomposition, leading to C accumulation in soils, but this process has received limited consideration by models. To address this, we developed a model of soil organic matter (SOM) dynamics to be used with the PnET model and applied it to simulate N addition effects on soil organic carbon (SOC) stocks. We developed the model's SOC turnover times and responses to experimental N additions using measurements from the Harvard Forest, Massachusetts. We compared model outcomes to SOC stocks measured during the 20th year of the Harvard Forest Chronic Nitrogen Amendment Study, which includes control, low (5 g N m-2 yr-1) and high (15 g N m-2 yr-1) N addition to hardwood and red pine stands. For unfertilized stands, simulated SOC stocks were within 10 % of measurements. Simulations that used measured changes in decomposition rates in response to N accurately captured SOC stocks in the hardwood low N and pine high N treatment, but greatly underestimated SOC stocks in the hardwood high N and the pine low N treatments. Simulated total SOC response to experimental N addition resulted in accumulation of 5.3-7.9 kg C per kg N following N addition at 5 g N m-2 yr-1 and 4.1-5.3 kg C per kg N following N addition at 15 g N m-2 yr-1. Model simulations suggested that ambient atmospheric N deposition at the Harvard Forest (currently 0.8 g N m-2 yr-1) has led to an increase in cumulative O, A, and B horizons C stocks of 211 g C m-2 (3.9 kg C per kg N) and 114 g C m-2 (2.1 kg C per kg N) for hardwood and pine stands, respectively. Simulated SOC accumulation is primarily driven by the modeled decrease in SOM decomposition in the Oa horizon. © 2013 Springer Science+Business Media Dordrecht.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83625
Appears in Collections:气候减缓与适应
气候变化事实与影响

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作者单位: Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, 14853, United States; Cornell International Institute for Food, Agriculture and Development, Cornell University, Ithaca, NY, 14853, United States; Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, 03824, United States; Complex Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, 03820, United States

Recommended Citation:
Tonitto C.,Goodale C.L.,Weiss M.S.,et al. The effect of nitrogen addition on soil organic matter dynamics: A model analysis of the Harvard Forest Chronic Nitrogen Amendment Study and soil carbon response to anthropogenic N deposition[J]. Biogeochemistry,2014-01-01,117(2018-02-03)
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