DOI: 10.1002/2014MS000361
Scopus记录号: 2-s2.0-85027937632
论文题名: Quantitative attribution of major driving forces on soil organic carbon dynamics
作者: Wu Y ; , Liu S ; , Tan Z
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 1 起始页码: 21
结束页码: 34
语种: 英语
英文关键词: Agriculture
; Biofuels
; Carbon
; Crops
; Decision making
; Dynamics
; Land use
; Rotation
; Soils
; Biofuel production
; Biogeochemical modeling
; Carbon dynamics
; Crop rotation
; Farming practices
; Soil organic carbon
; Organic carbon
; agricultural ecosystem
; agricultural management
; agricultural modeling
; agricultural practice
; biofuel
; carbon cycle
; crop rotation
; fertilizer application
; land use planning
; management practice
; numerical model
; oil production
; soil organic matter
; tillage
; United States
; Glycine max
; Zea mays
英文摘要: Soil organic carbon (SOC) storage plays a major role in the global carbon cycle and is affected by many factors including land use/management changes (e.g., biofuel production-oriented changes). However, the contributions of various factors to SOC changes are not well understood and quantified. This study was designed to investigate the impacts of changing farming practices, initial SOC levels, and biological enhancement of grain production on SOC dynamics and to attribute the relative contributions of major driving forces (CO2 enrichment and farming practices) using a fractional factorial modeling design. The case study at a crop site in Iowa in the United States demonstrated that the traditional corn-soybean (CS) rotation could still accumulate SOC over this century (from 4.2 to 6.8 kg C/m2) under the current condition; whereas the continuous-corn (CC) system might have a higher SOC sequestration potential than CS. In either case, however, residue removal could reduce the sink potential substantially. Long-term simulation results also suggested that the equilibrium SOC level may vary greatly (∼5.7 to ∼11 kg C/m2) depending on cropping systems and management practices, and projected growth enhancement could make the magnitudes higher (∼7.8 to ∼13 kg C/m2). Importantly, the factorial design analysis indicated that residue management had the most significant impact (contributing 49.4%) on SOC changes, followed by CO2 Enrichment (37%), Tillage (6.2%), the combination of CO2 Enrichment-Residue removal (5.8%), and Fertilization (1.6%). In brief, this study is valuable for understanding the major forces driving SOC dynamics of agroecosystems and informative for decision-makers when seeking the enhancement of SOC sequestration potential and sustainability of biofuel production, especially in the Corn Belt region of the United States. © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76068
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: ASRC Federal, U.S. Geological Survey Earth Resources Observation and Science Center, Sioux Falls, SD, United States; U.S. Geological Survey Earth Resources Observation and Science Center, Sioux Falls, SD, United States
Recommended Citation:
Wu Y,, Liu S,, Tan Z. Quantitative attribution of major driving forces on soil organic carbon dynamics[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(1)