湖北省籼、粳型水稻生长模拟及其应用

Growth simulation and application of indica and japonica rice in Hubei Province

为推进湖北省“籼改粳”种植模式发展,提升稻作模式光温资源利用效率和改善稻米品质,本研究结合湖北省多点田间试验资料及气象数据,对水稻生育期、干物质分配及产量进行了模型模拟。结果显示:对湖北省籼、粳稻生育期的模拟误差在2个生理发育日之内,对生育期、穗部干物质分配的模拟基本分布在1:1线附近,拟合效果较好;水稻实际产量和模拟产量的相对均方根误差(RRMSE)为11.4%,因此,该模拟过程具有可信度。同时,应用本研究模型模拟方法初步预测了粳稻在湖北省的适宜播期。研究结果可为湖北省籼、粳稻种植分布及播期选择提供参考。

A model simulation of the growth period,dry matter distribution and yield of rice was conducted based on the data from multiple field experiments and meteorological data in Hubei Province to promote the development of the“Shifting from indica rice to japonica rice”planting model in Hubei Province,increase the utilization efficiency of light and temperature resources in the rice farming model,and improve the quality of rice.Results showed that the simulation error of the growth period of indica and japonica rice in Hubei Province was within 2 days of physiological development.The simulation of growth period and panicle dry matter distribution was basically distributed near the 1:1 line,and the fitting effect was good.The relative root mean square error(RRMSE)of the practical rice yield and the simulated yield was 11.4%,indicating that the simulation process is credible.At the same time,the simulation method of this model was used to preliminarily predict the suitable sowing date of japonica rice in Hubei Province.It will provide references for selecting the planting distribution and sowing date of indica and japonic a rice in Hubei Province.