中国农业科学2017，Vol.50Issue(10)：1838-1851,14.DOI:10.3864/j.issn.0578-1752.2017.10.009
覆膜条件下对AquaCrop模型冬小麦生长动态和土壤水分模拟效果的评价分析
Evaluation Analysis of AquaCrop Model in Modeling Winter Wheat Growing Development and Soil Moisture Under Plastic Mulching
摘要
Abstract
[Objective] This study was conducted to evaluate the accuracy of the AquaCrop model in the simulation of winter wheat growth,soil moisture,yield,and water use efficiency under plastic mulching,which can provide a theoretical basis and scientific method for the calibration of the AquaCrop model under plastic mulching.[Method] The experiment was conducted at Yangling,Shaanxi,from 2013 to 2016 including the flat planting under plastic mulching (PM) and a control treatment without mulching (CK).The AquaCrop model was calibrated using the experiment data in 2014-2015 and was validated using the data in 2013-2014 and 2015-2016.[Result] The determination coefficient (R2) of the simulated and the measured canopy cover was between 0.86 and 0.99.The root mean square error (RMSE) of the simulated and the measured canopy cover was between 2.1％ and 8.1％,indicating AquaCrop model a good simulation for canopy cover.The R2 of the simulated and the measured biomass was greater than 0.95.Meanwhile,the RMSE of the simulated and the measured biomass was between 0.814 and 1.933 t·hm-2.The R2 of the simulated and the measured soil water content in CK was greater than 0.85,and the R2 of the simulated and the measured soil water content in PM was greater than 0.75.The RMSE of the simulated and the measured soil water content in both CK and PM was between 9.2 and 17.6 mm.The normalized root mean square error (NRMSE) of the simulated and the measured soil water content in both CK and PM was lower than 5.5.Moreover,the RE of the simulated and the measured yield in both CK and PM was from-4.4％ to 9.0％.The simulated and the measured yield in PM increased 40.5％ and 40.3％ compared to that in CK,respectively,and there was a significant difference between CK and PM.The RE of the simulated and the measured water use efficiency in both CK and PM was from-10.4％ to-1.5％.The simulated and the measured water use efficiency in PM increased by 54.1％ and 47.5％ compared to that in CK,respectively,and there was also a significant difference between CK and PM.The results showed that the simulated and measured values had the similar trend in wheat canopy coverage,biomass,yield,and water use efficiency.Those indicated a good performance of the AquaCrop model in modeling plastic mulching treatment.[Conclusion] The AquaCrop model can be used to model the winter wheat growing development and productivity under plastic mulching.This study provides a scientific method to calibrate the AquaCrop model and a good data support for the application and development of the AquaCrop model.关键词
AquaCrop模型/覆膜/土壤水分/产量/水分利用效率Key words
AquaCrop model/plastic mulching/soil water/yield/water use efficiency引用本文复制引用
刘匣,丁奠元,张浩杰,褚晓升,余坤,冯浩..覆膜条件下对AquaCrop模型冬小麦生长动态和土壤水分模拟效果的评价分析[J].中国农业科学,2017,50(10):1838-1851,14.基金项目
国家高技术研究计划(“863”计划)(2013AA102904)、高等学校学科创新引智计划(“111”计划)(B12007) （“863”计划）
