Super hybrid rice Liangyoupeijiu was grown by transplanting (TP) at a spacing of 20 cm x 20 cm with one seedling per hill and by direct-seeding (DS) at a seeding rate of 22.5 kg ha(-1) (about 120 seeds m(-2)) in Changsha, Hunan Province, China in 2004-2010. Grain yield and yield components were measured each year, and some physiological factors were determined in 2009. There was no significant difference in mean grain yield across years between DS and TP. DS produced more panicles per m(2) but less spikelets per panicle than TP. The differences in number of spikelets per m(2), spikelet filling...
