DOI: 10.1016/j.scitotenv.2020.137751
论文题名: Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China
作者: Chen D. ; Wei W. ; Daryanto S. ; Tarolli P.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 721 语种: 英语
英文关键词: Carbon sequestration
; China
; Land use
; Meta-analysis
; Terrace
Scopus关键词: Land use
; Organic carbon
; Reforestation
; Carbon sequestration
; China
; Concave structures
; Land productivities
; Meta analysis
; Soil organic carbon
; Soil organic carbon sequestration
; Terrace
; Soils
; carbon sequestration
; data set
; homogeneity
; land use change
; meta-analysis
; organic carbon
; soil carbon
; terracing
; China
英文摘要: Terracing practice is expected to reserve soil organic carbon (SOC) pools, which are the key components for maintaining soil fertility and land productivity. In China such practice is widespread from center to south since ancient time. In this work, to reveal the spatial-temporal variation characteristics of SOC under different terraced sites in China, we conducted a meta-analysis on 78 studies regarding terracing effects on SOC sequestration. The between-group heterogeneity analysis indicated that terracing land use, age, climatic background, and slope gradient were critical factors for SOC sequestration, while terracing structure and soil depth were not. Overall, for China's landscapes, terracing increased SOC sequestration by 32.4% on average. Relative to other terracing structures, level ditches and half-moon terraces receive more rainwater and fertile topsoil from upper slopes due to their specific concave structures. Terracing in those areas with lower temperatures and less precipitation showed higher SOC sequestration. The extent of SOC sequestration due to terracing was primarily determined by land use type. Reforestation terraces could increase SOC sequestration markedly by eliminating water erosion and related soil carbon loss. The terracing aged 1–2 years leads to a decrease of 6.4% averagely on SOC sequestration, likely because the breakdown of soil aggregates through soil excavation and redistribution improves the decomposition of SOC. Furthermore, terracing aged over five years was more effective on SOC sequestration. Since this study offered a useful synthesis on multiple terracing factors affecting soil carbon in China, it can help to provide a wiser utilization and management of terracing to maximize SOC sequestration, and to make better terracing practices in the context of global change. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158087
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China; Department of Land, Environment, Agriculture and Forestry, University of Padova, Agripolis, viale dell'Università 16, Legnaro, PD 35020, Italy
Recommended Citation:
Chen D.,Wei W.,Daryanto S.,et al. Does terracing enhance soil organic carbon sequestration? A national-scale data analysis in China[J]. Science of the Total Environment,2020-01-01,721