The experiments were replicated 3 times in
Nanning with a plot size of 36 m2 and 4 times in Changsha with a
plot size of 30 m2
. In Nanning, fifteen-day-old seedlings were
manually thrown on the soil surface at a density of 29 hills per m2
with 2 seedlings per hill. Plants received 210 kg N ha1
, 72 kg P2O5
ha1 and 180 kg K2O ha1
. N and K were applied in three splits: 50%
as basal, 30% at mid-tillering and 20% at panicle initiation. P was
applied as basal. In