基于三维模型的水稻叶片对穗重贡献率研究

在应用水稻株形设计系统(rice plant type design system,RPTDS)进行虚拟试验的基础上,结合在非自然群体中进行的田间试验以及穗重模型,分析了水稻叶片对穗重的贡献率。结果表明:剑叶、倒二叶对穗重的贡献率相同,均为15%,倒三叶,倒四、五叶对穗重的贡献率同为8%,但随着单位叶面积干物质积累量的增加,中下部叶片对穗重贡献率的提升幅度更大。因此,可通过重塑株形,使光能在群体中相对均匀分布,进而通过促进中下部叶片光合能力而提升产量水平。其中,倒三叶的形态、位置可能在株形设计中处于关键位置。

Contribution of Leaves to Panicle Weight of Rice Based on the 3Dimentional Model

The contribution of leaves to panicle weight of rice was studied based on the virtual experiment by rice plant type design system(RPTDS),combining with the modified rice population and panicle weight model in a field experiment.The result showed that the flag leaf and second leaf each contributes 15% of panicle weight,while the third,forth and fifth leaf each contributes 8%.Along with the increase of dry mater weight produced per unit leaf area,the middle and lower leaves contribute more to panicle weight.The yield level of rice could be increased by enhancing the photosynthetic ability through the improvement of plant type.The third leaf may be very important in plant type design.