DOI: 10.1016/j.atmosenv.2014.07.040
Scopus记录号: 2-s2.0-84904732424
论文题名: Three-year measurements of nitrous oxide emissions from cotton and wheat-maize rotational cropping systems
作者: Liu C ; , Yao Z ; , Wang K ; , Zheng X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 201
结束页码: 208
语种: 英语
英文关键词: Background emission
; Direct emission factor
; Irrigation
; Leaching
; Nitrous oxide
; Sampling protocol
Scopus关键词: Fertilizers
; Irrigation
; Leaching
; Nitrogen oxides
; Agricultural management
; Background emissions
; Continuous observation
; Direct emissions
; High-resolution measurements
; Nitrous oxide
; Nitrous oxide emissions
; Sampling protocol
; Cotton
; fertilizer
; rain
; water
; agricultural emission
; air temperature
; annual variation
; crop rotation
; estimation method
; fertilizer application
; leaching
; nitrous oxide
; agricultural management
; air temperature
; article
; cropping system
; environmental factor
; fertilization
; Gossypium
; harvest
; irrigation (agriculture)
; leaching
; maize
; nitrous oxide emission
; nonhuman
; priority journal
; wheat
; China
; Shanxi
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The remarkable expansion of fertilization and irrigation may stimulate nitrous oxide (N2O) emissions from cropping systems in northern China. High-resolution measurements were conducted in irrigated cotton and wheat-maize rotational systems in Shanxi Province, P.R. China, between 2007 and 2010 (three year-round crop cycles, hereinafter referred to as Y1, Y2 and Y3) to investigate the impacts of natural inter-annual variations and agricultural management on annual N2O emissions and direct emission factors (EFs). Overall, N2O emissions fluctuated diurnally, seasonally and inter-annually in the fertilized treatments. The hourly N2O fluxes closely followed the daily air temperature patterns. The daily mean fluxes corresponded to these hourly fluxes, which were observed between 09:00-10:00 and 19:00-20:00. An optimized sampling protocol could improve the reliability of discrete measurements when estimating cumulative emissions. The N2O emissions for the fertilized treatments were 2.7±0.2 (Y1) and 1.6±0.1kgNha-1yr-1 (Y2) from the cotton field and 6.2±0.4 (Y1), 4.5±0.3 (Y2) and 4.5±0.2kgNha-1yr-1 (Y3) from the wheat-maize field. Peak N2O emissions after fertilization and irrigation/rainfall lasted one to three weeks and accounted for 16-55% of the annual emissions. Leaching losses were estimated at 10.4±3.0 (Y1) and 12.5±3.4kgNha-1yr-1 (Y2), which accounted for 16-17% of the fertilizer-N applied to the cotton field. Annual N2O emissions did not increase with increasing fertilization rates or water inputs because significant amounts of fertilizer-N were lost through leaching. Background emissions amounted to one-third to one-half of the total N2O emissions from the fertilized treatments. The direct EFs were 2.2±0.3% (Y1) and 0.9±0.2% (Y2) in the cotton field and 1.3±0.2% (Y1), 0.8±0.1% (Y2) and 0.7±0.1% (Y3) in the wheat-maize field. The large inter-annual variations in N2O emissions and direct EFs emphasize the importance of multiple-year continuous observations. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80978
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Recommended Citation:
Liu C,, Yao Z,, Wang K,et al. Three-year measurements of nitrous oxide emissions from cotton and wheat-maize rotational cropping systems[J]. Atmospheric Environment,2014-01-01,96