Validation and testing of the AquaCrop model under full and deficit irrigated wheat production in Iran
Validation and testing of the AquaCrop model under full and deficit irrigated wheat production in Iran
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DOI：
10.1016/j.agwat.2011.08.023
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发表时间：
2011-11-15
影响因子：
6.7
通讯作者：
Rahnama, A.
中科院分区：
文献类型：
--
作者：
Andarzian, B.;Bannayan, M.;Rahnama, A.
准确的作物发育模型是评估水分亏缺对作物产量或生产力影响和预测产量的重要工具，可在有限水分条件下优化灌溉，提高可持续性和盈利生产。联合国粮食及农业组织（FAO）通过提供一个有限复杂的产量响应水模拟模型（AquaCrop）来解决这一需求。本研究的目的是评估AquaCrop模型在伊朗南部炎热干燥环境下模拟小麦（Triticum aestivum L）在充足和亏水条件下的生产能力，研究不同灌溉方案（作物生长阶段和施水深度）对小麦产量的影响。AquaCrop模型使用在Ahvaz进行的三次现场试验中收集的实验数据进行评估。AquaCrop模型能够准确模拟根区土壤含水量、作物生物量和粮食产量，归一化均方根误差（RMSE）小于10%。灌溉方案分析表明，丰水年播种、分蘖期、茎伸期、开花期或灌浆期4次灌溉（200 mm），正常年播种、茎伸期和花期4次灌溉（200 mm），干旱年播种、出苗期、分蘖期、茎伸期、开花期和灌浆期6次灌溉（300 mm）可获得最高产量。湿润年、正常年和干旱年提供足够的水分以响应环境蒸发需求和获得高水分利用效率的最少灌溉水量分别为100、200和250 mm。(C) 2011 Elsevier B.V.版权所有
Accurate crop development models are important tools in evaluating the effects of water deficits on crop yield or productivity and predicting yields to optimize irrigation under limited available water for enhanced sustainability and profitable production. Food and Agricultural Organization (FAO) of United Nations addresses this need by providing a yield response to water simulation model (AquaCrop) with limited sophistication. The objectives of this study were to evaluate the AquaCrop model for its ability to simulate wheat (Triticum aestivum L) performance under full and deficit water conditions in a hot dry environment in south of Iran, to study the effect of different scenarios of irrigation (crop growth stages and depth of water applied) on wheat yield. The AquaCrop model was evaluated with experimental data collected during the three field experiments conducted in Ahvaz. The AquaCrop model was able to accurately simulate soil water content of root zone, crop biomass and grain yield, with normalized root mean square error (RMSE) less than 10%. The analysis of irrigation scenarios showed that the highest grain yield could be obtained by applying four irrigations (200 mm) at sowing, tillering, stem elongation and flowering or grain filing stages for wet years, four irrigations (200 mm) at sowing, stem elongation and flowering stages for normal years and six irrigations (300 mm) at sowing, emergence, tillering, stem elongation, flowering and grain filing stages for dry years. The least amount of irrigation water to provide enough water to response to evaporative demand of environment and to obtain high WUE for wet, normal and dry years were 100, 200 and 250 mm, respectively. (C) 2011 Elsevier B.V. All rights reserved.