DOI: 10.1016/j.foreco.2012.12.015
Scopus记录号: 2-s2.0-84877919682
论文题名: Dynamics and speciation of organic carbon during decomposition of leaf litter and fine roots in four subtropical plantations of China
作者: Wang H. ; Liu S. ; Wang J. ; Shi Z. ; Lu L. ; Guo W. ; Jia H. ; Cai D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 300 起始页码: 43
结束页码: 52
语种: 英语
英文关键词: Carbon dynamics
; Litter decomposition
; Microclimate
; Plant traits
; Solid-state 13C CPMAS NMR spectroscopy
Scopus关键词: Carbon dynamics
; Compositional changes
; Decomposition process
; Leaf litter decomposition
; Litter decomposition
; Main controlling factors
; Microclimate
; Plant traits
; Carbon
; Carbon dioxide
; Forestry
; Magic angle spinning
; Nuclear magnetic resonance spectroscopy
; Soils
; Tropics
; Dynamics
; biogeochemistry
; broad-leaved forest
; carbon dioxide
; carbon isotope
; carbon sequestration
; coniferous forest
; decomposition
; fine root
; leaf litter
; microclimate
; organic carbon
; plantation forestry
; soil carbon
; soil emission
; speciation (chemistry)
; subtropical region
; turnover
; Carbon
; Carbon Dioxide
; Decay
; Forest Litter
; Forestry
; Nuclear Magnetic Resonance
; Soil
; Spectroscopy
; Tropics
; China
; Castanopsis hystrix
; Coniferophyta
; Michelia macclurei
; Mytilaria laosensis
; Pinus massoniana
英文摘要: Plant litter and fine roots turnover are important carbon (C) inputs to soil and a direct emission source of CO2 to the atmosphere. C dynamics during litter decomposition provide an insight into C flow in soils. To quantitatively assess how decomposition processes vary with litter types, the solid-state 13C nuclear magnetic resonance spectroscopy with cross-polarization and magic-angle spinning (CPMAS-NMR) technique was applied to analyze the organic C dynamics of conifer (Pinus massoniana) and broadleaf (Castanopsis hystrix, Michelia macclurei and Mytilaria laosensis) leaf litter and fine roots which had degraded during one year litterbag experiment in four subtropical plantations of China. The results were used to estimate decomposition rates of different C types and compositional changes of leaf litter and fine roots during decomposition. The mass loss rates of different C fractions during decomposition varied significantly between litter types. Site environment and initial litter quality played more critical roles in regulating decomposition of fine roots than of leaf litter. The significant changes in the proportion of C forms and degree of humification occurred during leaf litter decomposition, but not during fine roots decomposition. The proportions of alkyl C and carbonyl C and alkyl/O-alkyl C ratio varied with leaf litter types, with an increase for the proportion of alkyl C and alkyl/O-alkyl C ratio in broadleaf leaf litters and an enhanced trend for the proportion of carbonyl C for P. massoniana. The results suggest that the patterns and main controlling factors of litter C compositional change during decomposition differed between above- and belowground, and the dynamics of leaf litter C fractions during decomposition differed between conifer and broadleaf species. The findings of litter C compositional decomposition of the main tree species in this study could contribute to the accurate estimation of soil C sequestration in subtropical plantation ecosystems. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66600
Appears in Collections: 影响、适应和脆弱性
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作者单位: Key Laboratory of Forest Ecology and Environment, China's State Forestry Administration, Institute of Forest Ecology Environment and Protection, Chinese Academy of Forestry, No. 2 Dongxiaofu, Haidian District, Beijing 100091, China; Division of Forestry and Natural Resources, West Virginia University, P.O. Box 6215, Morgantown, WV 26506-6125, United States; Experimental Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang, Guangxi 532600, China
Recommended Citation:
Wang H.,Liu S.,Wang J.,et al. Dynamics and speciation of organic carbon during decomposition of leaf litter and fine roots in four subtropical plantations of China[J]. Forest Ecology and Management,2013-01-01,300