覆土浅埋滴灌玉米分阶段亏水条件下AquaCrop与Dual Crop Coefficient模型精度对比研究  

Comparison study of the AquaCrop and Dual Crop Coefficient models for maize water deficit in different stages under drip irrigation buried shallow soil

作　　者：戚迎龙 赵举[3] 宁小莉[2] 李彬[3] 李敏[2] 史海滨[1] QI Yinglong;ZHAO Ju;NING Xiaoli;LI Bin;LI Min;SHI Haibin(Water Conservancy and Civil Engineering College,Inner Mongolia Agricultural University,Hohhot 010018,China;Baotou Teachers College,Inner Mongolia Technology University,Baotou Inner Mongolia 014030,China;Inner Mongolia Academy of Agricultural&Animal Husbandry Science,Hohhot 010031,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]内蒙古科技大学包头师范学院,内蒙古包头014030 [3]内蒙古农牧业科学院,呼和浩特010031

出　　处：《东北农业大学学报》2023年第6期64-77,共14页Journal of Northeast Agricultural University

基　　金：内蒙古农牧业创新基金项目(2017CXJJN11);国家重点研发计划项目(2017YFD0201505);国家科技支撑计划项目(2014BAD12B03)。

摘　　要：近年来,西辽河流域地下水超采问题日益突出,改进灌溉技术降低农业用水可有效解决这一问题,但该技术缺乏科学的水分管理方法及适宜的理论模型。基于单阶段及多阶段亏水情形试验,对比同类农田水分模型精度,优选阶段性亏水管理辅助模型。研究设置7个玉米分阶段亏水调控处理,于2018、2019年进行田间小区试验,取得2个同类模型的本地化参数并比较其模拟精度。结果表明,AquaCrop和双作物系数模型可相近表达玉米冠层发育到最大而未开始衰减期间土壤水分的消耗过程,而对快速生长期与后期1m土层贮水量的模拟差异大。AquaCrop模型在土壤贮水量偏低时高估其实测值,其他情形正负偏差分布相对均匀,双作物系数模型多数情形低估其实测值。AquaCrop模型描述玉米各阶段蒸散量因亏水情形而变化能力优于双作物系数模型。AquaCrop模型和双作物系数模型的标准均方根误差平均值在模拟1 m土层贮水量时分别为4.494%~8.443%、6.017%~8.626%,在模拟蒸散量时分别为8.158%~9.510%、5.980%~15.022%。综合来看,AquaCrop模型表现更好,推荐作为适宜西辽河流域覆土浅埋滴灌玉米水分管理模型。研究可为该区域覆土浅埋滴灌种植玉米选出适宜的水分管理模型,理解新技术条件下玉米分阶段亏水调控机制及田间灌溉管理优化提供参考。In recent years,the problem of groundwater overexplo0itation in the West Liaohe River basin has become serious.The main method is to reduce agricultural water consumption by improving irrigation technology.However,new technologies lack scientific water management methods and appropriate theoretical models.Based on the single-stage and multi-stage water deficit tests,the accuracy of similar farmland water models was compared and the staged water deficit management aid model was preferred.In this study,seven maize staged water deficit control treatments were set up to conduct field plot tests in 2018 and 2019,aiming to obtain local parameters of similar two models and compared its simulation accuracy.The results showed that the models of AquaCrop and Dual Crop Coefficient were more similarly express the process of soil water consumption during the period of maximum maize canopy without beginning to decay.However,the simulation of water storage in 1 m soil layer during the rapid growth period and the later period was greatly different.AquaCrop model overestimated the measured value when the soil water storage was low,and the positive and negative deviation distribution was relatively uniform in other cases.AquaCrop model was superior to the Dual Crop Coefficient model in its ability to describe the changes in evapotranspiration of maize due to water deficit at various stages.The means of standardized root mean square error of the AquaCrop and Dual Crop Coefficient model was 4.494%-8.443%and 6.017%-8.626%for simulating water storage in 1 m soil layer.In addition,simulate the evapotranspiration was 8.158%-9.510%and 5.980%-15.022%respectively.In general,AquaCrop model performed better,and it was recommended to be a maize water management model suitable for shallow buried drip irrigation in the West Liaohe River basin.The study selects a suitable water management model for maize grown with shallow buried drip irrigation in the region,and provides a reference for understanding the mechanism of staged water deficit regula

关 键 词：模型精度 AquaCrop模型 双作物系数模型 覆土浅埋滴灌 玉米分阶段亏水 

分 类 号：S275.6[农业科学—农业水土工程]