DOI: 10.1111/gcb.13099
论文题名: Greenhouse gas emissions and global warming potential of traditional and diversified tropical rice rotation systems
作者: Weller S. ; Janz B. ; Jörg L. ; Kraus D. ; Racela H.S.U. ; Wassmann R. ; Butterbach-Bahl K. ; Kiese R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 1 起始页码: 432
结束页码: 448
语种: 英语
英文关键词: Aerobic rice
; Maize
; Methane
; Nitrous oxide
; Paddy rice
; Rice rotation systems, economy
; Yield-scaled GWP
Scopus关键词: crop rotation
; global warming
; greenhouse gas
; maize
; methane
; nitrous oxide
; paddy field
; rice
; Zea mays
; air pollutant
; methane
; nitrous oxide
; soil
; agriculture
; air pollutant
; analysis
; chemistry
; greenhouse effect
; growth, development and aging
; irrigation (agriculture)
; maize
; metabolism
; Oryza
; procedures
; season
; soil
; Agricultural Irrigation
; Agriculture
; Air Pollutants
; Global Warming
; Greenhouse Effect
; Methane
; Nitrous Oxide
; Oryza
; Seasons
; Soil
; Zea mays
英文摘要: Global rice agriculture will be increasingly challenged by water scarcity, while at the same time changes in demand (e.g. changes in diets or increasing demand for biofuels) will feed back on agricultural practices. These factors are changing traditional cropping patterns from double-rice cropping to the introduction of upland crops in the dry season. For a comprehensive assessment of greenhouse gas (GHG) balances, we measured methane (CH4)/nitrous oxide (N2O) emissions and agronomic parameters over 2.5 years in double-rice cropping (R-R) and paddy rice rotations diversified with either maize (R-M) or aerobic rice (R-A) in upland cultivation. Introduction of upland crops in the dry season reduced irrigation water use and CH4 emissions by 66-81% and 95-99%, respectively. Moreover, for practices including upland crops, CH4 emissions in the subsequent wet season with paddy rice were reduced by 54-60%. Although annual N2O emissions increased two- to threefold in the diversified systems, the strong reduction in CH4 led to a significantly lower (P < 0.05) annual GWP (CH4 + N2O) as compared to the traditional double-rice cropping system. Measurements of soil organic carbon (SOC) contents before and 3 years after the introduction of upland crop rotations indicated a SOC loss for the R-M system, while for the other systems SOC stocks were unaffected. This trend for R-M systems needs to be followed as it has significant consequences not only for the GWP balance but also with regard to soil fertility. Economic assessment showed a similar gross profit span for R-M and R-R, while gross profits for R-A were reduced as a consequence of lower productivity. Nevertheless, regarding a future increase in water scarcity, it can be expected that mixed lowland-upland systems will expand in SE Asia as water requirements were cut by more than half in both rotation systems with upland crops. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61546
Appears in Collections: 影响、适应和脆弱性
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作者单位: Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research (IMK-IFU), Kreuzeckbahnstr. 19, Garmisch-Partenkirchen, Germany; Technical University Munich (TUM), Arcisstraße 21, Munich, Germany; International Rice Research Institute (IRRI), Los Baños, Philippines; International Livestock Research Institute (ILRI), 30709 Naivasha Road, Nairobi, Kenya
Recommended Citation:
Weller S.,Janz B.,Jörg L.,et al. Greenhouse gas emissions and global warming potential of traditional and diversified tropical rice rotation systems[J]. Global Change Biology,2016-01-01,22(1)