DOI: 10.1016/j.atmosenv.2017.09.021
Scopus记录号: 2-s2.0-85030757440
论文题名: Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation
作者: Zhou W ; , Lin S ; , Wu L ; , Zhao J ; , Wang M ; , Zhu B ; , Mo Y ; , Hu R ; , Chadwick D ; , Shaaban M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 170 起始页码: 269
结束页码: 278
语种: 英语
英文关键词: Dissolved organic carbon
; N2O emission
; Rice-wheat rotation
; Water-filled pore space
; Winter-flooded paddy
Scopus关键词: Cultivation
; Moisture control
; Nitrogen
; Organic carbon
; Rotation
; Soil moisture
; Soils
; Stream flow
; Water conservation
; Cropping systems
; Dissolved organic carbon
; Growing season
; N fertilizers
; Rice-wheat rotations
; Split plot designs
; Water-filled pore space
; Winter-flooded paddy
; Floods
; ammonia
; dissolved organic carbon
; nitrous oxide
; organic carbon
; unclassified drug
; urea
; crop rotation
; dissolved organic carbon
; fallow
; growing season
; nitrous oxide
; paddy field
; rice
; soil carbon
; soil moisture
; soil nitrogen
; soil nutrient
; wheat
; winter
; agriculture
; Article
; controlled study
; cropping system
; environmental factor
; fertilizer application
; growing season
; nonhuman
; priority journal
; rice wheat rotation
; soil fertilization
; soil moisture
; wheat
; winter flooded paddy
; China
; Triticum aestivum
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: Winter-flooded paddy is a typical rice-based cropping system to conserve water for the next rice growing season. Conversion of winter-flooded paddy to rice-wheat rotation has been widely adopted with the development of the water conservation infrastructure and the government's encouragement of winter agriculture in China in recent decades. However, the effects of this conversion on N2O emission are still not clear. Three winter-flooded paddy fields were studied in a split-plot design. One-half of each field was converted to rice-wheat rotation (RW), and the other half remained winter-flooded as rice-fallow (RF). Each plot of RW and RF was further divided into four subplots: three subplots for conventional N fertilizer application (RW-NC and RF-NC) and one for unfertilized treatment (RW-N0 and RF-N0). Conversion of RF-NC to RW-NC increased the N2O emission up to 6.6-fold in the first year and 4.4-fold in the second year. Moreover, N2O emissions for the entire wheat season were 1.74–3.74 kg N ha−1 and 0.24–0.31 kg N ha−1 from RW-NC and RW-N0, respectively, and accounted for 78%–94% and 78%–97% of the total annual amount. N2O emitted during the first 11–21 days of the wheat season from RW-NC was 1.48–3.28 kg N ha−1 and that from RW-N0 was 0.14–0.17 kg N ha−1, which contributed to 66%–82% and 45%–71% of the total annual amount, respectively. High N2O fluxes occurred when the soil water-filled pore space (WFPS) was in the range of 68%–72% and the ratio of available carbon to nitrogen in the soil was <1.42. The contribution of WFPS and dissolved organic carbon (DOC) explained most of the variation of the N2O fluxes compared with the other measured environmental and soil factors. These findings suggest that the conversion of winter-flooded paddy to rice-wheat rotation increased N2O emissions that could be mitigated by controlling the soil moisture and ratio of available soil carbon to nitrogen. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82293
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of the Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China; Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China; School of Environment, Natural Resources and Geography, Bangor University, Gwynedd, Bangor, United Kingdom
Recommended Citation:
Zhou W,, Lin S,, Wu L,et al. Substantial N2O emission during the initial period of the wheat season due to the conversion of winter-flooded paddy to rice-wheat rotation[J]. Atmospheric Environment,2017-01-01,170