Abstract: The present study was investigated response of plateau rice varieties on blooming-fertilization to temperature and effect of pollen activity to low temperature on blooming stage, this experiment was conducted in the controlled chamber. In the present experiement, diffirence rice varieties exposed to low temperature at blooming stage. There are different response to low temperature among plateau varieties. A originated from middle high altitude arer, plateau rice variety-Lao lai bai has specific and wide adaptability to low temperature. It is the best varietie among five plateau rice varieties.

Key words: NULL, NULL