‘Yanfeng 47’and ‘Liaoxing 1’,two super rice varieties planted in the field,were taken as the materials in the study.Their yield,yield components,dry matter production and source-sink characteristics were investigated and analyzed.Results showed that yield of the two super rice varieties were significantly higher than that of ‘Liaojing 9’.Effective panicles and yield of ‘Yanfeng 47’were the most,whereas grains per panicle o ‘fLiaoxing 1’were the most.There was no significant difference in seed setting rate and kilo-grain weight among varieties.Dry matter production capability and transport rate of matter from sheath to grain after heading of super rice varieties were higher than the control variety.Glumes in unit area,leaf area,leaf weight in unit area and photosynthesis potential in grain-filling stage of super rice varieties were higher,but there was no obvious difference in ratio of source to sink among varieties.