DOI: 10.1111/gcb.12810
论文题名: Effects of elevated ozone concentration on CH4 and N2O emission from paddy soil under fully open-air field conditions
作者: Tang H. ; Liu G. ; Zhu J. ; Kobayashi K.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 4 起始页码: 1727
结束页码: 1736
语种: 英语
英文关键词: FACE
; Biomass
; CH4 emission
; Elevated ozone
; N2O emission
; Paddy soil
; Rice cultivar
Scopus关键词: biomass
; concentration (composition)
; cultivar
; global warming
; methane
; nitrous oxide
; ozone
; paddy field
; rice
; China
; air pollutant
; methane
; nitrous oxide
; ozone
; soil
; agriculture
; air pollutant
; chemistry
; China
; ecosystem
; genetics
; metabolism
; Oryza
; soil
; Agriculture
; Air Pollutants
; China
; Ecosystem
; Methane
; Nitrous Oxide
; Oryza
; Ozone
; Soil
英文摘要: We investigated the effects of elevated ozone concentration (E-O3) on CH4 and N2O emission from paddies with two rice cultivars: an inbred Indica cultivar Yangdao 6 (YD6) and a hybrid one II-you 084 (IIY084), under fully open-air field conditions in China. A mean 26.7% enhancement of ozone concentration above the ambient level (A-O3) significantly reduced CH4 emission at tillering and flowering stages leading to a reduction of seasonal integral CH4 emission by 29.6% on average across the two cultivars. The reduced CH4 emission is associated with O3-induced reduction in the whole-plant biomass (-13.2%), root biomass (-34.7%), and maximum tiller number (-10.3%), all of which curbed the carbon supply for belowground CH4 production and its release from submerged soil to atmosphere. Although no significant difference was detected between the cultivars in the CH4 emission response to E-O3, a larger decrease in CH4 emission with IIY084 (-33.2%) than that with YD6 (-7.0%) was observed at tillering stage, which may be due to the larger reduction in tiller number in IIY084 by E-O3. Additionally, E-O3 reduced seasonal mean NOx flux by 5.7% and 11.8% with IIY084 and YD6, respectively, but the effects were not significant statistically. We found that the relative response of CH4 emission to E-O3 was not significantly different from those reported in open-top chamber experiments. This study has thus confirmed that increasing ozone concentration would mitigate the global warming potential of CH4 and suggested consideration of the feedback mechanism between ozone and its precursor emission into the projection of future ozone effects on terrestrial ecosystem. Copyright © 2015 John Wiley & Sons Ltd214 April 2015 10.1111/gcb.12810 Primary Research Article Primary Research Articles © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61721
Appears in Collections: 影响、适应和脆弱性
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作者单位: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China; Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, Japan
Recommended Citation:
Tang H.,Liu G.,Zhu J.,et al. Effects of elevated ozone concentration on CH4 and N2O emission from paddy soil under fully open-air field conditions[J]. Global Change Biology,2015-01-01,21(4)