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首页> 外文会议>21st International congress on irrigation and drainage : Water productivity towards food security. >ASSESSMENT OF WHEAT WATER USE EFFICIENCY IN DIFFERENT DEFICIT IRRIGATION SENARIOS AND UNDER CLIMATE CHANGE CONDITION
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ASSESSMENT OF WHEAT WATER USE EFFICIENCY IN DIFFERENT DEFICIT IRRIGATION SENARIOS AND UNDER CLIMATE CHANGE CONDITION

机译：气候变化条件下不同亏缺灌溉条件下小麦水分利用效率评估

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The development of water-conserving agricultural practices is essential in order to limitrnagricultural water overuse. To find an effective way to save water in the wheat-growingrnseason without markedly reducing wheat yield, the CropSyst simulation model was calibrated,rnvalidated and used to simulate water use by spring wheat in Varamin plain. Dry (1998-99),rnnormal (1985-86) and wet (1997-98) growing season during 1980-2009 were determined. ThernCropSyst simulated wheat grain yield for different deficit irrigation scenarios in each growingrnseason. Using Arc CS we performed spatial water use efficiency analysis. For this, weatherrnregion, soil and cropping system map were prepared and with GIS software they were overlaidrnand combined simulation map obtained. The A2 emission scenario as reported by IPCC wasrnused and weather data were generated for the period of 2011-2040 by the ClimGen model.rnThe result show that in the wet growing season the potential yield average (7938 kg ha~(-1)) isrnhigher than dry (7725 kg ha~(-1)) and normal (6811 kg ha~(-1)) growing season. The results furtherrnshow that water productivity in wet, normal and dry growing season on base of Tr were 2.01rn(occurs in 50% Irrigation Requirement scenario), 1.95 (40 % IR) and 2 (40 % IR) kg m~(-3) and onrnbase of ET were 1.5 (70 % IR), 1.25 (80 % IR) and 1.4 (70 % IR) kg m~(-3) and on base of waterrnentering soil profile were 1.38(50 % IR), 1.04 (60 % IR) and 1.2 (40 % IR) kg m~(-3), respectively.rnThe analysis in climate change condition showed that average water productivity on base.
机译：为了限制过度使用农业用水，发展节水农业做法至关重要。为了找到一种在小麦生长季节节水而不显着降低小麦产量的有效方法，对CropSyst模拟模型进行了校准，验证并用于模拟Varamin平原春小麦的用水情况。确定了1980-2009年的干旱（1998-99），正常（1985-86）和潮湿（1997-98）生长季节。 TheCropSyst模拟了每个生长季节不同亏缺灌溉条件下的小麦籽粒产量。使用Arc CS，我们进行了空间用水效率分析。为此，准备了天气区域，土壤和耕作系统图，并使用GIS软件将其覆盖并获得了组合的模拟图。利用ClimGen模型对IPCC报告的A2排放情景进行了研究，并得出了2011-2040年的气象数据。结果表明，在湿生季节，潜在平均产量（7938 kg ha〜（-1））更高。干旱（7725 kg ha〜（-1））和正常（6811 kg ha〜（-1））生长季。结果进一步表明，以Tr为基础的湿，正常和干燥生长期的水分生产率分别为2.01rn（发生在50％灌溉需求的情况下），1.95（40％IR）和2（40％IR）kg m〜（-3 ）和ET的基础分别为1.5（70％IR），1.25（80％IR）和1.4（70％IR）kg m〜（-3），而在水耕土壤剖面的基础上分别为1.38（50％IR），1.04（ IR分别为60％IR和1.2（40％IR）kg m〜（-3）.rn在气候变化条件下的分析表明，平均水生产率是基准值。

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