Abstract: Based on the field experiment data of three supper hybrid rice varieties Zhunliangyou 527,Luliangyou 106 and Qianyou88 in Tianzhu County of Southeast Guizhou,effects of the transplanting at different seedling ages on rice growth and yield were analyzed.The results showed that the variety Zhunliangyou 527 required an optimum accumulated temperature of >10℃ was with 3400℃ and sunshine hours with 750 hours;The variety Luliangyou106 required an optimum accumulated temperature of >10℃ was with 3200℃ and sunshine hours with 700 hours;As for variety Qianyou 88,an optimum accumulated temperature of >10℃ with 3700℃ and sunshine hours with 800 hours were needed.The average yield per unit of three varieties reached at 800kg/ha,which met the requirements for a high yield of supper rice variety.The variety Zhunliangyou 527 got the highest yield,and the yield of the variety Luliangyou106 lay in the second place,and the yield of the variety Qianyou88 was lowest among three varieties.By young seedling transplanting,the growing period was prolonged by six to ten days and their yields were 123.0-339.3kg/ha higher,compared to the middle age transplanting.

Key words: Supper hybrid rice, Supper hybrid rice, Young seedling transplanting, Middle age seedling transplanting, Yield