Evaluation of the AquaCrop model for barley production under deficit irrigation and rainfed condition in Iran
Evaluation of the AquaCrop model for barley production under deficit irrigation and rainfed condition in Iran
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DOI：
10.1016/j.agwat.2015.07.020
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发表时间：
2015-11
影响因子：
6.7
通讯作者：
A. Tavakoli;Mehran Mahdavi Moghadam;A. Sepaskhah
中科院分区：
文献类型：
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作者：
A. Tavakoli;Mehran Mahdavi Moghadam;A. Sepaskhah
联合国粮食及农业组织（FAO）开发的AquaCrop模拟模型具有评估不同灌溉水管理下作物产量的能力。在这项研究中，2年（2005-2007年）的数据，从卡尔赫河流域（洛雷斯坦省）上游的一个研究项目的大麦，以评估的精度AquaCrop模型。试验处理包括：灌溉，在播种时的一次灌溉事件和在春季的一次灌溉事件，在农民的田地中进行。利用AquaCrop模型预测了非充分灌溉和灌水条件对产量、土壤含水量和绿色冠层覆盖率的影响。冠层覆盖率、土壤含水量和粮食产量的实测值与预测值的平均归一化均方根误差分别为8.7%、12.4%和9.2%，表明模型具有较好的精度。模型对产量、土壤含水量和绿色覆盖率的估计效率分别为0.91、0.8和0.98。产量的一致性指数接近1.0，表明这些预测值与实际值的兼容性。结果表明，AquaCrop模型是模拟研究区非充分灌溉和非充分灌溉条件下大麦产量的合适工具。该模型是一种基于第一次有效降雨量确定干旱条件下播期的有效工具。
The AquaCrop simulation model which has been developed by Food and Agricultural Organization (FAO) has the ability to assess the crop production under different irrigation water management. In this research, 2-year data of rainfed barley (2005–2007) from a research project at upstream of Karkheh river basin (Lorestan Province) were used to evaluate the accuracy of the AquaCrop model. The experimental treatments included: rainfed, one irrigation event at sowing time and one irrigation event at spring, that were performed in farmers’ fields. The AquaCrop model was evaluated to predict the effect of deficit irrigation and rainfed conditions on yield, soil water content and percentage of green canopy cover. The mean normalized mean root square error for comparison between the measured and predicted values for canopy cover percentage, soil water content, and grain yield were 8.7, 12.4 and 9.2%, respectively, that showed good model accuracy. Efficiency of the model in yield estimation, soil water content and green canopy cover percentage were 0.91, 0.8 and 0.98, respectively. Agreement index for yield was close to 1.0 that showed compatibility of these predicted values with actual values. The results showed that the AquaCrop model is appropriate tool to simulate barley yield under rainfed and deficit irrigation conditions in the study area. This model is a suitable tool to determine sowing date in rainfed conditions based on first effective rain.