DOI: 10.1016/j.foreco.2017.01.012
Scopus记录号: 2-s2.0-85009826126
论文题名: Heterogeneity in decomposition rates and annual litter inputs within fine-root architecture of tree species: Implications for forest soil carbon accumulation
作者: Lin G. ; Zeng D.-H.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 389 起始页码: 386
结束页码: 394
语种: 英语
英文关键词: Litter quality
; Meta-analysis
; Mycorrhizal type
; Root diameter
; Root order
; Turnover rate
Scopus关键词: Architecture
; Digital storage
; Organic carbon
; Soils
; Litter quality
; Meta analysis
; Mycorrhizal type
; Root diameters
; Root ordering
; Turnover rate
; Forestry
; carbon sequestration
; decomposition
; fine root
; forest soil
; litter
; meta-analysis
; mycorrhiza
; root architecture
; soil organic matter
英文摘要: Fine roots (⩽2 mm in diameter) of tree species, traditionally regarded as homogenous entities, are expected to be major contributors of forest soil organic carbon (C), but their contributions need to be reevaluated given the heterogeneity in many root characteristics within fine-root architecture. Here, literature data were synthesized to analyze whether there existed heterogeneity of decomposition rates within fine-root architecture of tree species and quantify the relative contributions of roots of each branching order to forest soil C storage by combining variations in annual litter inputs among fine-root branching hierarchies. Results showed the presence of heterogeneity in decomposition rates within fine-root architecture, and this pattern was influenced by classification methods (root order or diameter class). Specifically, the heterogeneity in decomposition rates was shown only when fine roots were classified by root order, but not when fine roots were classified by diameter class. The slower decomposition rates of lower-order roots (the first two orders) were related to their higher acid-unhydrolyzable residues. Furthermore, lower-order roots were found to account for 57–71% of annual root litter inputs of the first five orders. Given the slow decomposition rates and high annual litter inputs of lower-order roots of tree species, our findings suggest that lower-order roots should be important contributors to forest soil organic C. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64476
Appears in Collections: 影响、适应和脆弱性
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作者单位: CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
Recommended Citation:
Lin G.,Zeng D.-H.. Heterogeneity in decomposition rates and annual litter inputs within fine-root architecture of tree species: Implications for forest soil carbon accumulation[J]. Forest Ecology and Management,2017-01-01,389