DOI: 10.1016/j.foreco.2015.11.048
Scopus记录号: 2-s2.0-84949814398
论文题名: Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland
作者: Hu Y.-L. ; Zeng D.-H. ; Ma X.-Q. ; Chang S.X.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 362 起始页码: 38
结束页码: 45
语种: 英语
英文关键词: 13C stable isotope
; Afforestation
; Cropland
; Litter input
; SOC sequestration
; Subsurface soil
Scopus关键词: Carbon dioxide
; Forestry
; Grain (agricultural product)
; Organic carbon
; Reforestation
; Afforestation
; Cropland
; Litter input
; Stable isotopes
; Subsurface soil
; Soils
; Populus
; Populus simonii
; Zea mays
英文摘要: Afforestation on croplands has been proposed as a means to mitigate the increasing emission of anthropogenic CO2. However, the relative contribution of above- and belowground litter input on soil organic carbon (SOC) sequestration following afforestation is not fully understood. We used a 270-day laboratory incubation experiment to examine the impact of litter type (i.e., leaf vs. fine root litter) of a poplar tree (Populus simonii Carr., C3 plant) on soil respiration and the turnover of new vs. old soil C in surface (0-10cm) and subsurface mineral soils (40-50cm) collected from a marginal cropland planted to maize (Zea mays L., C4 plant) in a semi-arid region in northeast China. Our results showed that fine root rather than leaf litter addition helps to sequester SOC even though soil microbial respiration rates were stimulated by both leaf and fine root litter input. Neither leaf nor fine root litter addition stimulated mineralization of old soil C across the two soil layers, but more new C was incorporated into the soil with fine root addition as compared with leaf litter addition. Moreover, the subsurface soil had greater potential to sequester SOC as compared to the surface soil. Our results suggest that root rather than leaf litter input drives soil carbon sequestration on the marginal soil, especially in the subsurface soil, and planting deep-rooted trees with large belowground biomass production could be used to increase SOC sequestration in marginal croplands. © 2015 Elsevier B.V..
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65103
Appears in Collections: 影响、适应和脆弱性
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作者单位: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China; Department of Renewable Resources, University of Alberta, Edmonton, Canada
Recommended Citation:
Hu Y.-L.,Zeng D.-H.,Ma X.-Q.,et al. Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland[J]. Forest Ecology and Management,2016-01-01,362