DOI: 10.1007/s10533-013-9863-z
Scopus记录号: 2-s2.0-84897370413
论文题名: Nanoscale structure of organic matter could explain litter decomposition
作者: Papa G. ; Scaglia B. ; Schievano A. ; Adani F.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 2018-02-03 起始页码: 313
结束页码: 324
语种: 英语
英文关键词: Aromatic carbon
; Biomass
; Micro-porosity
; Recalcitrance
Scopus关键词: biodegradation
; carbon flux
; chemical environmental conditions
; decomposition
; enzyme activity
; greenhouse gas
; litter
; mineralization
; soil fertility
; soil organic matter
; soil quality
; three-dimensional modeling
英文摘要: Soil organic matter (SOM) turnover is crucial for soil quality and fertility in biogeochemical carbon cycle dynamics that can influence the fluxes of greenhouse gases. This research was focused to acquire deeper understanding of the mechanisms leading to decomposition of plant tissue and SOM persistence against both aerobic and anaerobic biodegradation. Decomposition rates of a various biomass types were studied conducting experiments in both aerobic and anaerobic environments. Different analytical approaches were applied in order to characterize biomass at chemical and physical levels. Combined statistical approaches were used to examine the relationships between carbon mineralization and chemical/physical characteristics. The obtained results revealed that degradation was significantly and negatively correlated with the micro-porosity surface (surface of pores of 0.3-1.5 nm of diameter). The multiple regressions performed by using partial least squares modelling enabled describing biomass biodegradability under either aerobic and anaerobic condition by using micro-porosity and aromatic-C content (assumed to be representative of lignin) as independent variables (R2 = 0.97, R cv 2 = 0.95 for aerobic condition; R2 = 0.99, R cv 2 = 0.98 for anaerobic condition, respectively). These results corroborate the hypothesis that plant tissues are physically protected from enzymatic attack by a microporous "sheath" that limits enzyme penetration into cell wall, and demonstrate the key role played by aromatic carbon, because of its chemical protection of the other cell wall polymers and its contribution to the three-dimensional (3D) cell wall structure. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83606
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: Gruppo Ricicla, Dipartimento di Science Agrarie e Ambientali, Produzione Territorio, Agroenergia, Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy
Recommended Citation:
Papa G.,Scaglia B.,Schievano A.,et al. Nanoscale structure of organic matter could explain litter decomposition[J]. Biogeochemistry,2014-01-01,117(2018-02-03)