Simulation and optimization of irrigation schedule for summer maize based on SWAP model in saline region
作者机构：National and Local Joint Engineering of Hydraulic Engineering Safety and Efficient Utilization of Laboratory on Water Resources in Poyang Lake BasinNanchang Institute of TechnologyNanchang 330099China Jiangxi Water Resources InstituteNanchang 330013China
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2020年第13卷第3期
页 面：117-122页
核心收录：
基 金：This research was financially supported by Jiangxi Educational Bureau Science-Technology Research Program(GJJ170981) National Natural Science Foundation of China(51709144) and Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences(FIRI2017-22-01)
主 题：SWAP model summer maize irrigation schedule saline region Lubotan
摘 要：In order to explore the appropriate irrigation schedule for summer maize,a field experiment was conducted in 2013 in Lubotan of Shaanxi *** water content,soil salinity,soil hydraulic parameters,crop growth parameters and summer maize yield were measured in the *** SWAP model was calibrated based on field experiment observation data in *** SWAP model was used to simulate and optimize irrigation schedule for summer maize after *** results showed that model simulation results of soil water content,soil salinity and summer maize yield agreed well with the measured *** Root Mean Square Error(RMSE)and Mean Relative Error(MRE)were within the allowable error *** RMSE values were all lower than 0.05 cm3/cm3 and the MRE values were lower than 15%in soil water content *** RMSE values were all lower than 0.1 mg/cm3 and the MRE values were lower than 20%in soil salinity *** RMSE and MRE values were 1299.6 kg/hm2 and 15.26%in summer maize yield *** model parameters suitable for the study area were obtained in *** SWAP model could be used to simulate and optimize irrigation schedule for summer maize after *** SWAP model was used to simulate soil water-salt balance,summer maize yield and water use efficiency under different irrigation *** model simulation results for different irrigation schedules indicated that the optimal irrigation schedules of summer maize were three times each for jointing stage(July 5),heading stage(August 5)and grain filling stage(August 30)with irrigation amount of 128 mm,128 mm and 96 mm,*** optimal irrigation quota was 352.0 mm for summer maize in the study area.
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