Effects of Different Position Leaves on Grain Plumpness in Rice

In this experiment,eight rice cultivars were applied for leaf-cutting treatment at the anthesis.The results indicated that leaf-cutting could lower the percentage of ripened grains and grain weight,especially influence greatly the grains with late flowering,and reduce the yield.The order of the effect that leaves contributed to curved panicle rice's grain filling is as follows:the flagthe second leave from the topother leaves,while to semi-erect panicle rice flag is the largest.Cutting leaves could significantly increase not-ripened grains percentage.There were little differences among effect of leaves to yield with different panicle type rice.The effect to yield of flag with curved panicle was much more than that of semi-erect panicle.