IGSNRR OpenIR
Different responses of soil organic carbon fractions to additions of nitrogen
Chen, H.1,2; Li, D.1,2; Feng, W.3; Niu, S.4; Plante, A.5; Luo, Y.6; Wang, K.1,2
2018-11-01
Source PublicationEUROPEAN JOURNAL OF SOIL SCIENCE
ISSN1351-0754
Volume69Issue:6Pages:1098-1104
Corresponding AuthorLi, D.(dejunli@isa.ac.cn)
AbstractCarbon-nitrogen (C-N) interactions in terrestrial ecosystems regulate climate-C cycle feedbacks. How additions of N affect soil C sequestration and then regulate climate change, however, are not fully understood. Previous studies have assessed effects of N on bulk soil organic C (SOC) but have not yet carefully examined its effects on different SOC fractions, which determine how fast the N-regulated C cycle feeds back to climate. Here we synthesized data from 36 studies with 296 observations by a meta-analysis to evaluate the responses of SOC fractions to N additions. We hypothesized that additions of N might increase both labile and non-labile C fractions. The SOC that was separated by density fractionation increased by 18.3% for free light fractions and by 3.0% for heavy density fractions without change in the occluded light fraction under N addition compared with the control. The SOC that was separated by aggregate fractionation increased by 4.4% for macroaggregate-associated fractions and by 6.5% for aggregate mineral-associated fractions without change in the microaggregate-associated fraction under N additions. When bulk SOC was separated by chemical permanganate oxidation, the oxidizable fraction increased by 10.4%, whereas the unoxidizable fraction increased by 4.5%. The changes in different soil C fractions were related to the mechanisms of SOC stabilization. Because of the significant increases in non-labile SOC fractions, our findings suggest that on a global scale, increased additions of N might promote SOC accumulation and slow down climate change in the long term. Our results will be useful in model development for better prediction of SOC sequestration under additions of N.
DOI10.1111/ejss.12716
WOS KeywordSTABILIZATION MECHANISMS ; TERRESTRIAL ECOSYSTEMS ; AGRICULTURAL SOILS ; MATTER ; METAANALYSIS ; DYNAMICS ; STORAGE ; SEQUESTRATION ; DEPOSITION ; TURNOVER
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Guangxi Province of China[2017GXNSFAA198038] ; National Key Research and Development Program of China[2016YFC0502404] ; Chinese Academy of Sciences through its 'Light of West China' Program ; National Natural Science Foundation of China[31500405] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA13010302]
Funding OrganizationNatural Science Foundation of Guangxi Province of China ; National Key Research and Development Program of China ; Chinese Academy of Sciences through its 'Light of West China' Program ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000449864100013
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52503
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, D.
Affiliation1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
2.Chinese Acad Sci, Inst Subtrop Agr, Huanjiang Observat & Res Stn Karst Ecosyst, Huangjiang 547100, Guangxi, Peoples R China
3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
5.Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA 19104 USA
6.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
Recommended Citation
GB/T 7714
Chen, H.,Li, D.,Feng, W.,et al. Different responses of soil organic carbon fractions to additions of nitrogen[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2018,69(6):1098-1104.
APA Chen, H..,Li, D..,Feng, W..,Niu, S..,Plante, A..,...&Wang, K..(2018).Different responses of soil organic carbon fractions to additions of nitrogen.EUROPEAN JOURNAL OF SOIL SCIENCE,69(6),1098-1104.
MLA Chen, H.,et al."Different responses of soil organic carbon fractions to additions of nitrogen".EUROPEAN JOURNAL OF SOIL SCIENCE 69.6(2018):1098-1104.
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