Evaluation of the FAO Aqua Crop model for winter wheat on the North China Plain under deficit irrigation from field experiment to regional yield simulation
Evaluation of the FAO Aqua Crop model for winter wheat on the North China Plain under deficit irrigation from field experiment to regional yield simulation
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DOI：
10.1016/j.agwat.2013.12.012
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发表时间：
2014-03-31
影响因子：
6.7
通讯作者：
del Rio, Sara
中科院分区：
文献类型：
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作者：
Iqbal, M. Anjum;Shen, Yanjun;del Rio, Sara
冬小麦是华北平原的主要作物，水分是该地区冬小麦生长的最大限制因子。本研究的目的是调整和测试粮农组织开发的AquaCrop模型（v3.1）模拟冬小麦籽粒产量，生物量，实际蒸散量（ETa）和土壤总含水量（0-120厘米）的能力。1998-2001年在栾城农业生态系统站进行了亏缺灌溉条件下的田间试验，利用处理D（1999-2000）对AquaCrop模型进行了校正，其余数据用于模型的验证。考虑到实际的田间条件，利用1990-2010年试验站的实测粮食产量数据对AquaCrop模型进行了重新验证。利用1995-2010年的统计粮食产量进行了第二次再验证。对于模型的验证，模拟和观测的籽粒产量，生物量和ET之间的显着差异的顺序是：灌溉处理>充分供水处理>中度水分胁迫。AquaCrop模拟的土壤水分总量往往与实测数据趋势一致，但灌溉处理略有低估，灌溉处理显著高估。一般而言，模型评估中的误差（如RMSE和Willmot's d统计量）为谷物产量（0.58 Mg ha（-1），0.92），生物量（0.87 Mg ha（-1），0.95），ETa（33.2 mm，0.93）和土壤含水量（24.5-37.6 mm，0.85-0.90）。基于广泛验证和再验证的总体结果表明，AquaCrop是一个有效的模型，可以用于优化冬小麦籽粒产量生产和水分需求的NCP具有可靠的精度。(c)2014爱思唯尔有限公司版权所有。
Winter wheat is the main crop on the North China Plain (NCP), and in this region the most limiting factor for the crop is water. The objective of this study was to adapt and test the ability of the FAO-developed AquaCrop model (v3.1) to simulate winter wheat grain yield, biomass, actual evapotranspiration (ETa) and total soil water content (0-120 cm). Field experiments were conducted under deficit irrigation at the Luancheng Agro-ecosystem station (NCP) in 1998-2001, and the AquaCrop model was calibrated with treatment D(1999-2000); the rest of the data was used for validation of the model. The AquaCrop model was revalidated with data on measured grain yield from the experimental station for 1990-2010, considering actual field conditions. The second revalidation was done with the statistical grain yield for 1995-2010 in the study region. For the model validation, the significant differences between simulated and observed grain yield, biomass and ET, were in the order of: rainfed treatment> well-watered treatment> moderate water stress. Total soil water simulated by AquaCrop tends to follow closely the trend in the measured data, but with slight underestimations for irrigated treatments and significant overestimations for rainfed treatments. In general, errors in the model's evaluation such as RMSE and Willmot's d statistics were for grain yield (0.58 Mg ha(-1), 0.92), biomass (0.87 Mg ha(-1), 0.95), ETa (33.2 mm, 0.93) and soil water content (24.5-37.6 mm, 0.85-0.90). The overall results based on extensive validation and revalidation showed that AquaCrop is a valid model and can be used with a reliable degree of accuracy for optimizing winter wheat grain yield production and water requirement on the NCP. (c) 2014 Elsevier B.V. All rights reserved.