基于ORYZA2000模型的旱稻生长模拟及氮肥管理研究

以旱稻田间试验资料为基础，对水稻生长模拟模型ORYZA2000模拟旱稻生长进行参数校正和验证，图解和回归分析结果显示ORYZA2000模拟旱稻生物量、产量、作物吸氮量的模拟值与观测值基本呈线性关系，模拟效果良好，但对土壤水分的模拟效果欠佳，需做进一步研究。应用校正和验证的结果，结合肥料效应函数原理，对旱稻不同灌溉方式和密度管理下的氮肥经济最佳施肥量做了探讨，初步得出了该地区旱稻栽培氮肥经济最佳施肥量，丰富了作物模拟和节水农业的理论和实践，对以后旱稻发展及栽培管理有一定的参考价值。

Growth simulation of aerobic rice and its nitrogen management on the basis of ORYZA2000

On the basis of experiment data on farm for aerobic rice, calibration and evaluation of ORYZA2000 model were done for its simulation of aerobic rice growth. Results of graph and regression analysis showed that the values of aerobic biomass, yield and nitrogen uptake simulated by ORYZA2000 were significantly linear with the observed values, which showed a better simulation effect. However the simulation of soil water potential was not good enough, and more research was needed. According to the results of calibration and evaluation, and combined with fertilizer effect function, the authors explored the optimum economic application amount of N fertilizer under different irrigations and density management for aerobic rice; and derived the optimum application amount of N fertilizer for aerobic rice in the experiment area. The result of the paper enriches the theory and practice of crop simulation and water-saving agriculture, and would be a reference for the development of aerobic rice and its management.