In order to investigation of rice cultivars reaction to Different plantings date , an experimental was carried out in a split plot design based on RCBD with three replications for one years (2011) in research farm of Islamic Azad University of Chaloos in Iran. Treatments were included planting date in three levels as main plots in spring planting (15,25 May and 4 June 2011) and varieties as sub plots in four levels (Deilamani, Line 3, Line 5 and Ramezanali Tarom). The results indicated that simple effects of planting date and variety and also interaction effect on all agronomical traits and nitrogen remobilization of stem in experimental were significant (P<0.01). Results revealed that planting time on 15th May proved to be the best for obtaining maximum grain yield (Line 3,6444 kg.ha- 1). Also 25th May sowing gave maximum nitrogen remobilization of stem for Ramezanali Tarom varieties (5.71 kg.ha-1).
