DOI: 10.1002/2014GB004871
Scopus记录号: 2-s2.0-84916881523
论文题名: Nitrous oxide emissions from cultivated black soil: A case study in Northeast China and global estimates using empirical model
作者: Chen Z ; , Ding W ; , Luo Y ; , Yu H ; , Xu Y ; , Müller C ; , Xu X ; , Zhu T
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 11 起始页码: 1311
结束页码: 1326
语种: 英语
英文关键词: Black soil
; Denitrification
; Empirical model
; Heterotrophic nitrification
; Manure
; Nitrous oxide
Scopus关键词: carbon sequestration
; empirical analysis
; global change
; heterotrophy
; manure
; nitrification
; nitrous oxide
; soil carbon
; soil organic matter
; China
; Suidae
; Zea mays
英文摘要: Manure application is effective in promoting soil carbon sequestration, but its impact on N2O emission is not well understood. A field experiment was conducted in a maize-cultivated black soil in Northeast China with six treatments: inorganic fertilizer (NPK), 75% inorganic fertilizer N plus 25% pig (PM1) or chicken (CM1) manure N, 50% inorganic fertilizer N plus 50% pig (PM2) or chicken (CM2) manure N, and no N fertilizer (CK). Annual N2O emission significantly increased from 0.34 kg N ha-1 for CK to 0.86 kg N ha-1 for NPK and further to 1.65, 1.02, 1.17, and 0.93 kg Nha-1 for PM1, CM1, PM2, and CM2, respectively. A 15N tracing study showed that 71-79% of total N2O was related to nitrification at 30-70% water-filled pore space (WFPS), and heterotrophic nitrification contributed 49% and 25% to total N2O at 30% and 70% WFPS, respectively. In an incubation, N2O emission was only stimulated when nitrate and glucose were applied together at 60% WFPS, indicating that denitrification was carbon limited. PM had a stronger effect on denitrification than CM due to higher decomposability, and the lower N2O emission at higher manure application rate was associated with decreased mineral N supply. After compiling a worldwide database and establishing an empirical model that related N2O emissions (kg Nha-1) to precipitation (Pr, m) and fertilizer N application rate (Nr, kg N ha-1) (N2O = 1.533Pr + 0.0238PrNr), annual N2O emission from global-cultivated black soil applied with inorganic fertilizer N was estimated as 347 Gg N. Our results suggested that N2O emission from cultivated black soils in China was low primarily due to low precipitation and labile organic carbon availability, and would be stimulated by manure application; thus, increased N2O emission should be taken into consideration as applying manure increases soil organic carbon sequestration. ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77476
Appears in Collections: 气候变化事实与影响
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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; University of Chinese Academy of Sciences, Beijing, China; Department of Botany and Microbiology, University of Oklahoma, Norman, OK, United States; School of Biology and Environmental Science, University College Dublin, Dublin, Ireland; Department of Plant Ecology, Justus-Liebig University Giessen, Giessen, Germany; School of Geography Science, Nanjing Normal University, Nanjing, China
Recommended Citation:
Chen Z,, Ding W,, Luo Y,et al. Nitrous oxide emissions from cultivated black soil: A case study in Northeast China and global estimates using empirical model[J]. Global Biogeochemical Cycles,2014-01-01,28(11)