In order to screen out optimal early hybrid rice varieties suitable for planting in Changsha region,yield and pho-tosynthetic characters of 5 early hybrid rice varieties,Lingliangyou 104,Luliangyou 611,T you705,Lingliangyou 396 and Luliangyou 211,were compared with conventional early rice variety Xiangzaoxian No. 45 as control. The results showed that there existed significant difference in yield among 6 varieties,and yield of early hybrid rice varieties was higher than that of control except for Luliangyou 211,and the yield of T you 705 and Lingliangyou 396 was higher,about 7. 1t/hm2,which wa...