Iron addition to soil specifically stabilized lignin
作者: Steven J. HallWhendee L. SilverVitaliy I. TimokhinKenneth E. Hammel
作者单位: 1Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, United States
2Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States
3Department of Biochemistry, Wisconsin Energy Institute, University of Wisconsin, Madison, WI 53706, United States
4US Forest Products Laboratory, Madison, WI 53726, United States
5Department of Bacteriology, University of Wisconsin, Madison, WI 53706, United States
刊名: Soil Biology and Biochemistry, 2016, Vol.98 , pp.95-98
来源数据库: Elsevier Journal
DOI: 10.1016/j.soilbio.2016.04.010
关键词: Carbon stabilizationIronLigninRecalcitranceRedoxSoil organic matter
英文摘要: Abstract(#br)The importance of lignin as a recalcitrant constituent of soil organic matter (SOM) remains contested. Associations with iron (Fe) oxides have been proposed to specifically protect lignin from decomposition, but impacts of Fe-lignin interactions on mineralization rates remain unclear. Oxygen (O 2 ) fluctuations characteristic of humid tropical soils drive reductive Fe dissolution and precipitation, facilitating multiple types of Fe-lignin interactions that could variably decompose or protect lignin. We tested impacts of Fe addition on 13 C methoxyl-labeled lignin mineralization in soils that were exposed to static or fluctuating O 2 . Iron addition suppressed lignin mineralization to 21% of controls, regardless of O 2 availability. However, Fe addition had no effect on soil...
全文获取路径: Elsevier  (合作)
影响因子:3.654 (2012)