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以冬小麦石家庄8号为材料,对华北平原不同灌溉处理下应用CERES-Wheat模型模拟节水栽培冬小麦生育时期、产量与产量构成因素、生物量、土壤水分含量、土壤硝态氮含量和地上部吸氮量的效果进行了系统分析。结果表明:在节水及不灌溉条件下,CERES-Wheat模型对冬小麦生育时期、产量、生物量的模拟效果良好;在高水分灌溉条件下,模型对生育时期的模拟效果良好,对其他性状的模拟效果不够理想,并且模型过高估计了灌溉对产量的贡献率。该模型可以模拟不同灌溉处理土壤水分动态变化基本特征,但稳定性有待提高。模型对不同灌溉处理2m土体土壤硝态氮含量的模拟效果较好,对吸氮量的模拟效果较差。要提高模型的系统性精度,需要在模型机制上进一步改进。
Winter wheat Shijiazhuang 8 was used as material to simulate water-saving cultivation of winter wheat with CERES-Wheat model under different irrigation patterns in North China Plain. Yield and yield components, biomass, soil moisture content, soil nitrate nitrogen content and shoot uptake The effect of nitrogen amount was systematically analyzed. The results showed that under the condition of water-saving and non-irrigation, the simulation effect of CERES-Wheat model on the growth period, yield and biomass of winter wheat was good. Under high water irrigation conditions, the simulation effect of model on growth period was good, The simulation results are less than ideal, and the model overestimates the contribution of irrigation to yield. The model can simulate the basic characteristics of soil moisture dynamic changes under different irrigation treatments, but the stability needs to be improved. The simulation results of soil nitrate nitrogen content of 2m soil with different irrigation treatments are better, and the simulation results of nitrogen absorption rate are poor. To improve the systematic accuracy of the model, we need to further improve the model mechanism.