水利学报Issue(5)：584-593,10.DOI:10.13243/j.cnki.slxb.20141014
半干旱地区喷灌玉米CERES-Maize模型率定验证及应用
Calibration,validation and application of the CERES-Maize model for sprinkled maize in the semi-arid region
摘要
Abstract
Crop model is an efficient tool to determine best management practices of irrigation and fertiliza⁃tion. The calibration and validation of the model is fundamentally important for applying the crop model. In this study,the data obtained from two years (2012 and 2013) experiments of maize conducted in the semi-arid region with varying irrigation and nitrogen levels under sprinkler irrigation were used to calibrate and validate the CERES-Maize model. Then the calibrated and verified model was used to evaluate the ef⁃fect of irrigation and nitrogen schedules on maize yield and nitrogen leaching under different precipitation patterns. The validation shows that the model is able to well capture the variation in LAI during the maize growing seasons. Irrigation level imposes a more important influence on the model accuracy of LAI than ni⁃trogen application rate. Furthermore,the model indicates a high accuracy of LAI for the treatments with suffi⁃cient water supply with a normalized root mean square error (nRMSE) ranging from 23.0 % to 37.7 %, and an index of agreement (d) ranging from 0.612 to 0.945. The model shows a low accuracy of LAI for the treatments with severe water deficits with nRMSE ranging from 31.8 % to 60.6 %, and d ranging from 0.501 to 0.878. The yield and plant biomass at harvest are all in excellent agreement with the field mea⁃surements with a relative error value ranging from 0.1 % to -17.7 %, and nRMSE ranging from 7.6 % to 8.7 %, and d ranging from 0.758 to 0.791. It is therefore confirmed that the CERES-Maize model can be used to optimize water and nitrogen management practices for sprinkled maize in the semi-arid region. The optimal irrigation amount during a dry year derived from the model is 292 mm applied at ten irrigation events. While the optimal irrigation amount is 191 mm applied at eight events for a normal year and 95 mm applied at six events for a wet year. The recommended optimal nitrogen applied for obtaining high maize yield while reducing nitrogen leaching is 160 kg·hm-2 with 40 kg·hm-2 applied prior to seeding and 60 kg·hm-2 applied during the jointing stage and tasseling stage,respectively.关键词
CERES-Maize模型/半干旱地区/喷灌/玉米/叶面积指数/干物质质量/产量Key words
CERES-Maize model/semi-arid region/sprinkler irrigation/maize/leaf area index/plant biomass/yield分类
农业科技引用本文复制引用
温江丽,李久生..半干旱地区喷灌玉米CERES-Maize模型率定验证及应用[J].水利学报,2015,(5):584-593,10.基金项目
国家科技支撑计划课题（2012BAD08B02）；国家863计划课题 （）
