DOI: 10.1002/2015GB005178
Scopus记录号: 2-s2.0-84941875182
论文题名: Understanding large-extent controls of soil organic carbon storage in relation to soil depth and soil-landscape systems
作者: Mulder V ; L ; , Lacoste M ; , Martin M ; P ; , Richer-De-Forges A ; , Arrouays D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 8 起始页码: 1210
结束页码: 1229
语种: 英语
英文关键词: model-based clustering
; soil organic carbon
; soil-landscape systems
; spatial variation
Scopus关键词: biogeochemistry
; carbon sequestration
; cluster analysis
; data mining
; homogeneous medium
; sampling
; soil carbon
; soil depth
; soil organic matter
; spatial variation
; topsoil
; France
英文摘要: In this work we aimed at developing a conceptual framework in which we improve our understanding of the controlling factors for soil organic carbon (SOC) over vast areas at different depths. We postulated that variability in SOC levels may be better explained by modeling SOC within soil-landscape systems (SLSs). The study was performed in mainland France, and explanatory SOC models were developed for the sampled topsoil (0-30 cm) and subsoil (>30 cm), using both directed and undirected data-mining techniques. With this study we demonstrated that there is a shift in controlling factors both in space and depth which were mainly related to (1) typical SLS characteristics and (2) human-induced changes to SLSs. The controlling factors in relation to depth alter from predominantly biotic to more abiotic with increasing depth. Especially, water availability, soil texture, and physical protection control deeper stored SOC. In SLSs with similar SOC levels, different combinations of physical protection, the input of organic matter, and climatic conditions largely determined the SOC level. The SLS approach provided the means to partition the data into data sets that were having homogenous conditions with respect to this combination of controlling factors. This information may provide important information on the carbon storage and sequestration potential of a soil. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77957
Appears in Collections: 气候变化事实与影响
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作者单位: INRA, Unité Infosol, US 1106, Orléans Cedex 2, France; INRA, UR 0272 Science du Sol, Centre de Recherche d'Orléans, Orléans Cedex 2, France
Recommended Citation:
Mulder V,L,, Lacoste M,et al. Understanding large-extent controls of soil organic carbon storage in relation to soil depth and soil-landscape systems[J]. Global Biogeochemical Cycles,2015-01-01,29(8)