Abstract: Based on the ecological and climatic data of the air temperature,precipitation,sunshine hours,altitude and sowing time in sixteen meteorological stations from 2005 to 2007 in the Southeast Guizhou,the effects of the ecological and climatic factors on the super rice yields of Zhunliangyou 527 were analyzed.The results showed that the most suitable areas were with the altitude from 480 to 750 m,especially the areas with altitude about 620m.The most suitable sowing time was from March 28 to April 7.The per unit area(mu,667 square meter) yield reduced from 48.7 to 376.3 kg if the sowing time was delayed by 10 days.The most suitable accumulated temperature was from 3200 to 3800℃.The per unit area(mu,667 square meter) yield reduced from 8.32 to 140.43 kg if the accumulated temperature increased by 100℃.The most suitable precipitation was from 460 to 800 mm,and the per unit area(mu,667 square meter) yield decreased by from 7.41 to 338.36 kg if the precipitation increased or decreased by 100mm.The most suitable sunshine hours was from 620 to 730 hours,the yields would markedly cut down when the sunshine hours were lower then 500 hours or higher then 900 hours.

Key words: Zhunliangyou527, Zhunliangyou527, Ecological and climatic change, Yield, Southeast Guizhou