DOI: 10.1111/gcb.13966
Scopus记录号: 2-s2.0-85041331237
论文题名: Soil pH as the chief modifier for regional nitrous oxide emissions: New evidence and implications for global estimates and mitigation
作者: Wang Y. ; Guo J. ; Vogt R.D. ; Mulder J. ; Wang J. ; Zhang X.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 2 起始页码: e617
结束页码: e626
语种: 英语
英文关键词: emission factor
; environmental factors
; global meta-analysis
; greenhouse gas estimate and mitigation
; nitrous oxide
; nonlinearity coefficient
; soil pH
Scopus关键词: bottom-up approach
; emission inventory
; environmental factor
; fertilizer application
; greenhouse gas
; meta-analysis
; nitrous oxide
; ozone depletion
; pH
; soil emission
; soil property
; stratosphere
英文摘要: Nitrous oxide (N2O) is a greenhouse gas that also plays the primary role in stratospheric ozone depletion. The use of nitrogen fertilizers is known as the major reason for atmospheric N2O increase. Empirical bottom-up models therefore estimate agricultural N2O inventories using N loading as the sole predictor, disregarding the regional heterogeneities in soil inherent response to external N loading. Several environmental factors have been found to influence the response in soil N2O emission to N fertilization, but their interdependence and relative importance have not been addressed properly. Here, we show that soil pH is the chief factor explaining regional disparities in N2O emission, using a global meta-analysis of 1,104 field measurements. The emission factor (EF) of N2O increases significantly (p <.001) with soil pH decrease. The default EF value of 1.0%, according to IPCC (Intergovernmental Panel on Climate Change) for agricultural soils, occurs at soil pH 6.76. Moreover, changes in EF with N fertilization (i.e. ΔEF) is also negatively correlated (p <.001) with soil pH. This indicates that N2O emission in acidic soils is more sensitive to changing N fertilization than that in alkaline soils. Incorporating our findings into bottom-up models has significant consequences for regional and global N2O emission inventories and reconciling them with those from top-down models. Moreover, our results allow region-specific development of tailor-made N2O mitigation measures in agriculture. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110511
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China; Department of Chemistry, University of Oslo, Oslo, Norway; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Wang Y.,Guo J.,Vogt R.D.,et al. Soil pH as the chief modifier for regional nitrous oxide emissions: New evidence and implications for global estimates and mitigation[J]. Global Change Biology,2018-01-01,24(2)