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