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	Origin of positive delta C-13 of emitted CO2 from soils after application of biogas residues
	Chen, Ruirui1,3; Senbayram, Mehmet2,3; Lin, Xiangui1; Dittert, Klaus3
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2011-10-01
卷号	43期号:10页码:2194-2199
关键词	Biogas residues Positive delta C-13 Inorganic C Fractionation
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2011.07.003
通讯作者	Chen, Ruirui(rrchen@issas.ac.cn)
英文摘要	Bioenergy production from renewable organic material is known to be a clean energy source and therefore its use is currently much promoted in many countries. Biogas by-products also called biogas residues (BGR) are rich in partially stable organic carbon and can be used as an organic fertilizer for crop production. However so far, many environmental issues relevant when BGR are applied to agricultural land (soil C sequestration, increased denitrification and nutrient leaching) still have to be studied. Therefore a field experiment was set up to investigate the degradation of BGR and its impact on the decomposition of native soil organic matter based on a natural abundance stable isotope approach. Maize, a C-4 plant has been used as bioenergy crop, therefore the delta C-13 of total C in BGR was -6.0 parts per thousand(PDB) soil organic matter was mostly derived from C-3 plant based detritus, SOM thus showed a delta C-13 of 28.4 parts per thousand(PDB) Immediately after BGR application, soil-emitted CO2 showed unexpectedly high delta C-13 of up to +23.6 parts per thousand(PDB), which has never been reported earlier. A subsequent laboratory scale experiment confirmed the positive PC of soil-emitted CO2 after BGR addition and showed that obviously, the added BGR led to a consumption of dissolved inorganic C in soils. Additionally, it was observed that the delta C-13 of CO2 driven from inorganic C of BGR (BGR-IC) by acid treatment was +35.6 parts per thousand(PDB). Therefore, we suggest that also under field conditions the transformation of BGR-IC into CO2 contributed largely to CO2 emissions in addition to the decomposition of organic matter, which affected both the amount and the carbon isotope signature of emitted CO2 in the initial period after BGR application. Positive delta C-13 of inorganic C contained in BGR was attributed to processes with strong fractionation of C isotopes during anaerobic fermentation in the biogas formation process. (C) 2011 Elsevier Ltd. All rights reserved.
收录类别	SCI
WOS关键词	CARBON-ISOTOPE FRACTIONATION ; ANAEROBIC-DIGESTION ; NATURAL-ABUNDANCE ; INORGANIC CARBON ; ORGANIC-MATTER ; GRASSLAND SOIL ; QUANTIFICATION ; DIOXIDE ; ENERGY ; C-13
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000295153300023
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558867
专题	南京土壤研究所
通讯作者	Chen, Ruirui
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Hanninghof Res Ctr, Inst Plant Nutr & Environm Sci, D-48249 Duelmen, Germany 3.Univ Kiel, Inst Plant Nutr & Soil Sci, D-24118 Kiel, Germany
推荐引用方式 GB/T 7714	Chen, Ruirui,Senbayram, Mehmet,Lin, Xiangui,et al. Origin of positive delta C-13 of emitted CO2 from soils after application of biogas residues[J]. SOIL BIOLOGY & BIOCHEMISTRY,2011,43(10):2194-2199.
APA	Chen, Ruirui,Senbayram, Mehmet,Lin, Xiangui,&Dittert, Klaus.(2011).Origin of positive delta C-13 of emitted CO2 from soils after application of biogas residues.SOIL BIOLOGY & BIOCHEMISTRY,43(10),2194-2199.
MLA	Chen, Ruirui,et al."Origin of positive delta C-13 of emitted CO2 from soils after application of biogas residues".SOIL BIOLOGY & BIOCHEMISTRY 43.10(2011):2194-2199.

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