| The effect of water-saving culture of late-sowing and late-transplanting on grain yield and panicle traits of super japonica rice in northern China was studied with different sowing and transplanting stage treatments.The results showed that the most suitable latesowing stage and late-transplanting stage of Shennong602 were the first ten-days of May and the middle to the last ten-days of June,respectively,under which the grain yield was over 9 000 kg/hm2;As for the seedlings sowed at suitable stage,the inferior limit of latetransplanting stage was June 10;In order to get the yield of more than 7 500 kg/hm2,the inferior limit of the late-sowing was May 20,and the transplanting stage was the first and the middle ten-days of June.When the sowing and transplanting stage was too late,the grains could not fully ripe,the seed-setting rate was decreased,and the grain filling rate was lowered. |