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借助中国唯一的FACE技术平台,通过设置不同的N肥处理,研究了FACE条件下水稻干物质积累及分配动态的模拟模型.模型以生理发育时间为驱动因子,以CO2浓度函数为主要影响因子,同时引入N素影响因子调节干物质的积累与各器官分配指数.模拟结果表明,随着大气CO2浓度的增加,水稻地上部总干物重显著增加,叶干重分配指数下降,穗干重分配指数基本不变,茎干重分配指数前期增加,后期持平.通过不同年份试验数据对模型的验证,预测根均方差(RMSE)较小,且相关系数均达到了极显著水平.表明模型拟合程度高,具有较好的适应性和预测性.
With the help of China’s only FACE technology platform, a simulation model of rice dry matter accumulation and distribution dynamics under FACE was set up by setting different N fertilizer treatments.The model took the physiological development time as the driving factor, the CO2 concentration function as the main influencing factor, At the same time, the influence factors of N were introduced to regulate the accumulation of dry matter and the distribution index of various organs.The simulation results showed that with the increase of atmospheric CO2 concentration, the total dry matter weight of above-ground parts of rice increased significantly, the dry matter redistribution index decreased, The stem redistribution index increased at the early stage and remained at the later stage.The root mean square error of variance (RMSE) predicted by the test data of different years was very small, and the correlation coefficients reached the extremely significant level, indicating that the model fitting degree High, with good adaptability and predictability.