globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-018-0424-3
Scopus记录号: 2-s2.0-85042354698
论文题名:
Beyond clay: towards an improved set of variables for predicting soil organic matter content
作者: Rasmussen C.; Heckman K.; Wieder W.R.; Keiluweit M.; Lawrence C.R.; Berhe A.A.; Blankinship J.C.; Crow S.E.; Druhan J.L.; Hicks Pries C.E.; Marin-Spiotta E.; Plante A.F.; Schädel C.; Schimel J.P.; Sierra C.A.; Thompson A.; Wagai R.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 137, 期:3
起始页码: 297
结束页码: 306
语种: 英语
英文关键词: Biogeochemistry ; Carbon cycle ; Soil organic matter
英文摘要: Improved quantification of the factors controlling soil organic matter (SOM) stabilization at continental to global scales is needed to inform projections of the largest actively cycling terrestrial carbon pool on Earth, and its response to environmental change. Biogeochemical models rely almost exclusively on clay content to modify rates of SOM turnover and fluxes of climate-active CO2 to the atmosphere. Emerging conceptual understanding, however, suggests other soil physicochemical properties may predict SOM stabilization better than clay content. We addressed this discrepancy by synthesizing data from over 5,500 soil profiles spanning continental scale environmental gradients. Here, we demonstrate that other physicochemical parameters are much stronger predictors of SOM content, with clay content having relatively little explanatory power. We show that exchangeable calcium strongly predicted SOM content in water-limited, alkaline soils, whereas with increasing moisture availability and acidity, iron- and aluminum-oxyhydroxides emerged as better predictors, demonstrating that the relative importance of SOM stabilization mechanisms scales with climate and acidity. These results highlight the urgent need to modify biogeochemical models to better reflect the role of soil physicochemical properties in SOM cycling. © 2018, Springer International Publishing AG, part of Springer Nature.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83182
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 Soil, Water and Environmental Science, The University of Arizona, Tucson, AZ, United States; US Forest Service Northern Research Station, Houghton, MI, United States; Climate and Global Dynamics Laboratory National Center for Atmospheric Research & Institute of Arctic and Alpine Research, University of Colorado, Boulder, Boulder, CO, United States; University of Massachusetts-Amherst, Amherst, MA, United States; U.S. Geological Survey, Boulder, CO, United States; University of California, Merced, Merced, CA, United States; University of Hawaii Manoa, Honolulu, HI, United States; University of Illinois Urbana-Champaign, Champaign, IL, United States; Dartmouth College, Hanover, NH, United States; Department of Geography, University of Wisconsin – Madison, Madison, WI, United States; University of Pennsylvania, Philadelphia, PA, United States; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States; University of California – Santa Barbara, Santa Barbara, CA, United States; Max Planck Institute for Biogeochemistry, Jena, Germany; Department of Crop and Soil Science and the Odum School of Ecology, University of Georgia, Athens, GA, United States; National Agriculture and Food Research Organization, Institute for Agro-Environmental Sciences, Tsukuba, Japan

Recommended Citation:
Rasmussen C.,Heckman K.,Wieder W.R.,et al. Beyond clay: towards an improved set of variables for predicting soil organic matter content[J]. Biogeochemistry,2018-01-01,137(3)
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