A field experiment was conducted to investigate the actual impacts of nighttime warming on rice growth stage and grain yield in Danyang,Jiangsu Province,with 8 leading varieties approved and released during 1970s-2000s. The field was warmed at nighttime for an entire growth stage( i. e. sown date to harvest) with a Free Air Temperature Increase( FATI) facility. The results showed that there were significant differences in the extents of warming impact on rice growth stage and grain yield among the leading v...