The Study on Plant Shape of Different Panicle Rice Varieties

Selecting two typical different panicle rice varieties to study rice shape,the result shows: comparing with the curved panicle rice variety,in grain filling stage,the spike of erect panicle rice variety protect vertical condition,intersection angle of leaf especial the upper third leaves are very small,so the distribution of light in the crown of rice is very reasonable,the light reaching to the middle and lower part of the rice is very great,which contributes to the diffusion of CO_2 and grain filling.The spike of the curved panicle rice is becoming crooked and crooked with the grain filling,and the force on stem is also turning greater and greater,all these easily lead rice to fall.In flowering and milky stage,rice population was labeled through CO_2,the result showed that the photosynthesis of panicle was only 5.4 percent,and which was roughly the same between the erect panicle rice type and curved panicle rice type.