埃塞俄比亚苔麸作物需水量的时空变化与趋势分析

he agriculture in Ethiopia is mainly rain-fed, which is vulnerable to climate change.Teff (Eragrostis tef) is the native and main crop of Ethiopia, the staple food of Ethiopians.Penman-Monteith method recommended by the United Nations Food and Agriculture Organization (FAO) was used to calculate the teff crop water requirement in Ethiopia.Based on 20 meteorological stations data in Ethiopia, analysed the temporal-spatial change tendency of crops water requirement of teff from 2002 to 2009 using geographic information system (GIS).Irrigation should be appropriately increased to mitigate the impacts of climate change in water deficit areas.The conclusions are following: Mid-season and late-season stages are critical to the growth of teff and land area which crop water requirement deficit reaches over 50% is more than half area of Ethiopia. Therefore, these areas should be increased irrigation practices, in order to compensate for teff water deficit.