Can Egypt become self-sufficient in wheat?

被引:68
|
作者
Asseng, Senthold [1 ]
Kheir, Ahmed M. S. [1 ,2 ]
Kassie, Belay T. [1 ]
Hoogenboom, Gerrit [1 ]
Abdelaal, Aly I. N. [2 ,3 ]
Haman, Dorota Z. [1 ]
Ruane, Alex C. [4 ]
机构
[1] Univ Florida, Agr & Biol Engn Dept, Gainesville, FL 32611 USA
[2] Agr Res Ctr, Soils Water & Environm Res Inst, Giza, Egypt
[3] Minist Agr & Land Reclamat, Dokki, Egypt
[4] NASA, Goddard Inst Space Studies, New York, NY 10025 USA
来源
ENVIRONMENTAL RESEARCH LETTERS | 2018年 / 13卷 / 09期
关键词
wheat; climate change impact; food security; water demand; adaptation; CLIMATE-CHANGE; ENRICHMENT FACE; ELEVATED CO2; WIDE-RANGE; TEMPERATURE; MODEL; GROWTH; PRODUCTIVITY; PERFORMANCE; YIELD;
D O I
10.1088/1748-9326/aada50
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Egypt produces half of the 20 million tons of wheat that it consumes with irrigation and imports the other half. Egypt is also the world's largest importer of wheat. The population of Egypt is currently growing at 2.2% annually, and projections indicate that the demand for wheat will triple by the end of the century. Combining multi-crop and -climate models for different climate change scenarios with recent trends in technology, we estimated that future wheat yield will decline mostly from climate change, despite some yield improvements from new technologies. The growth stimulus from elevated atmospheric CO2 will be overtaken by the negative impact of rising temperatures on crop growth and yield. An ongoing program to double the irrigated land area by 2035 in parallel with crop intensification could increase wheat production and make Egypt self-sufficient in the near future, but would be insufficient after 2040s, even with modest population growth. Additionally, the demand for irrigation will increase from 6 to 20 billion m(3) for the expanded wheat production, but even more water is needed to account for irrigation efficiency and salt leaching (to a total of up to 29 billion m(3)). Supplying water for future irrigation and producing sufficient grain will remain challenges for Egypt.
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页数:11
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