Two rice genotypes were used in this experiment,
namely Nipponbare and Jiaxing27. Thirty-day old
seedlings of each genotype were transplanted to the
pots with three hills per pot and two seedlings per hill.
Before transplanting, NPK fertilizers within the
recommended range were applied to each pot (in
mg/kg dry soil). N at a rate of 180 mg was applied two
times: 70% as basal and 30% at panicle initiation. P and K were applied as basal at a rate of 60 and 100 mg,
respectively.