DOI: 10.1038/s41561-017-0004-5
论文题名: Increased food production and reduced water use through optimized crop distribution
作者: Davis K.F. ; Rulli M.C. ; Seveso A. ; D'Odorico P.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 12 起始页码: 919
结束页码: 924
语种: 英语
Scopus关键词: agricultural intensification
; agricultural land
; agricultural technology
; crop plant
; crop yield
; cropping practice
; cultivation
; demand analysis
; food production
; growing season
; irrigation system
; optimization
; rainfed agriculture
; rainwater
; rural population
; smallholder
; water use
; yield response
英文摘要: Growing demand for agricultural commodities for food, fuel and other uses is expected to be met through an intensification of production on lands that are currently under cultivation. Intensification typically entails investments in modern technology - such as irrigation or fertilizers - and increases in cropping frequency in regions suitable for multiple growing seasons. Here we combine a process-based crop water model with maps of spatially interpolated yields for 14 major food crops to identify potential differences in food production and water use between current and optimized crop distributions. We find that the current distribution of crops around the world neither attains maximum production nor minimum water use. We identify possible alternative configurations of the agricultural landscape that, by reshaping the global distribution of crops within current rainfed and irrigated croplands based on total water consumption, would feed an additional 825 million people while reducing the consumptive use of rainwater and irrigation water by 14% and 12%, respectively. Such an optimization process does not entail a loss of crop diversity, cropland expansion or impacts on nutrient and feed availability. It also does not necessarily invoke massive investments in modern technology that in many regions would require a switch from smallholder farming to large-scale commercial agriculture with important impacts on rural livelihoods. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105658
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Earth Institute, Columbia University, New York, NY, United States; Nature Conservancy, New York, NY, United States; Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, United States
Recommended Citation:
Davis K.F.,Rulli M.C.,Seveso A.,et al. Increased food production and reduced water use through optimized crop distribution[J]. Nature Geoscience,2017-01-01,10(12)