Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aadeef |
Closing the yield gap while ensuring water sustainability | |
Rosa, Lorenzo1; 39;Odorico, Paolo2 | |
2018-10-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Italy |
英文摘要 | Water is amajor factor limiting crop production inmany regions around the world. Irrigation can greatly enhance crop yields, but the local availability and timing of freshwater resources constrains the ability of humanity to increase food production. Innovations in irrigation infrastructure have allowed humanity to utilize previously inaccessible water resources, enhancing water withdrawals for agriculture while increasing pressure on environmental flows and other human uses. While substantial additional water will be required to support future food production, it is not clear whether and where freshwater availability is sufficient to sustainably close the yield gap in cultivated lands. The extent to which irrigation can be expanded within presently rainfed cropland without depleting environmental flows remains poorly understood. Here we perform a spatially explicit biophysical assessment of global consumptive water use for crop production under current and maximum attainable yield scenarios assuming current cropping practices. We then compare these present and anticipated water consumptions to local water availability to examine potential changes in water scarcity. We find that global water consumption for irrigation could sustainably increase by 48%(408 km(3) H(2)Oyr(-1))expanding irrigation to 26% of currently rainfed cultivated lands (2.67 x 10(6)km(2)) and producing 37% (3.38 x 10(15) kcal yr(-1)) more calories, enough to feed an additional 2.8 billion people. If current unsustainable bluewater consumption (336 km(3) yr(-1)) and production (1.19 x 10(15) kcal yr(-1)) practices were eliminated, a sustainable irrigation expansion and intensificationwould still enable a 24% increase in calorie (2.19 x 10(15) kcal yr(-1)) production. Collectively, these results show that the sustainable expansion and intensification of irrigation in selected croplands could contribute substantially to achieving food security and environmental goals in tandem in the coming decades. |
英文关键词 | water-energy-food nexus sustainability irrigation crop yield gaps food production environmental flows |
领域 | 气候变化 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000445610800002 |
WOS关键词 | GROUNDWATER DEPLETION ; GLOBAL SYSTEM ; IRRIGATION ; INTENSIFICATION ; LIMITS ; NEXUS ; REQUIREMENTS ; AVAILABILITY ; BIODIVERSITY ; FOOTPRINT |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32137 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 2.Politecn Milan, Dept Civil & Environm Engn, I-20133 Milan, Italy; 3.Nature Conservancy, New York, NY 10001 USA; 4.Columbia Univ, Earth Inst, New York, NY 10025 USA; 5.Columbia Univ, Data Sci Inst, New York, NY 10025 USA |
推荐引用方式 GB/T 7714 | Rosa, Lorenzo,39;Odorico, Paolo. Closing the yield gap while ensuring water sustainability[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(10). |
APA | Rosa, Lorenzo,&39;Odorico, Paolo.(2018).Closing the yield gap while ensuring water sustainability.ENVIRONMENTAL RESEARCH LETTERS,13(10). |
MLA | Rosa, Lorenzo,et al."Closing the yield gap while ensuring water sustainability".ENVIRONMENTAL RESEARCH LETTERS 13.10(2018). |
条目包含的文件 | 条目无相关文件。 |
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