DOI: 10.1111/gcb.12145
论文题名: Impact of agricultural management practices on soil organic carbon: Simulation of Australian wheat systems
作者: Zhao G. ; Bryan B.A. ; King D. ; Luo Z. ; Wang E. ; Song X. ; Yu Q.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 5 起始页码: 1585
结束页码: 1597
语种: 英语
英文关键词: Agricultural management practice
; APSIM
; Australia
; Carbon sequestration
; Climate change
; Crop model
; Soil organic carbon
; Wheat
Scopus关键词: carbon
; agricultural management
; agricultural production
; carbon sequestration
; climate change
; computer simulation
; cropping practice
; environmental conditions
; environmental impact
; fertilizer application
; organic carbon
; soil carbon
; soil moisture
; spatiotemporal analysis
; temperature effect
; wheat
; agriculture
; article
; Australia
; climate change
; environment
; metabolism
; methodology
; nonparametric test
; soil
; theoretical model
; wheat
; Agriculture
; Australia
; Carbon
; Climate Change
; Environment
; Models, Theoretical
; Soil
; Statistics, Nonparametric
; Triticum
; Australia
; Triticum aestivum
英文摘要: Quantifying soil organic carbon (SOC) dynamics at a high spatial and temporal resolution in response to different agricultural management practices and environmental conditions can help identify practices that both sequester carbon in the soil and sustain agricultural productivity. Using an agricultural systems model (the Agricultural Production Systems sIMulator), we conducted a high spatial resolution and long-term (122 years) simulation study to identify the key management practices and environmental variables influencing SOC dynamics in a continuous wheat cropping system in Australia's 96 million ha cereal-growing regions. Agricultural practices included five nitrogen application rates (0-200 kg N ha-1 in 50 kg N ha-1 increments), five residue removal rates (0-100% in 25% increments), and five residue incorporation rates (0-100% in 25% increments). We found that the change in SOC during the 122-year simulation was influenced by the management practices of residue removal (linearly negative) and fertilization (nonlinearly positive) - and the environmental variables of initial SOC content (linearly negative) and temperature (nonlinearly negative). The effects of fertilization were strongest at rates up to 50 kg N ha-1, and the effects of temperature were strongest where mean annual temperatures exceeded 19 °C. Reducing residue removal and increasing fertilization increased SOC in most areas except Queensland where high rates of SOC decomposition caused by high temperature and soil moisture negated these benefits. Management practices were particularly effective in increasing SOC in south-west Western Australia - an area with low initial SOC. The results can help target agricultural management practices for increasing SOC in the context of local environmental conditions, enabling farmers to contribute to climate change mitigation and sustaining agricultural production. © 2013 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62467
Appears in Collections: 影响、适应和脆弱性
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作者单位: Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences, Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Anwai, Beijing, 100101, China; CSIRO Ecosystem Sciences, Waite Campus, Urrbrae, SA, 5064, Australia; CSIRO Land and Water, Black Mountain, Canberra, ACT, 2601, Australia; College of Environment and Natural Resources, Zhejiang University, Hangzhou, 310058, China; Plant Functional Biology and Climate Change Cluster, School of the Environment, University of Technology, PO Box 123, Broadway, Sydney, NSW, 2007, Australia
Recommended Citation:
Zhao G.,Bryan B.A.,King D.,et al. Impact of agricultural management practices on soil organic carbon: Simulation of Australian wheat systems[J]. Global Change Biology,2013-01-01,19(5)