) Extraordinary fertilizer and water managements.
The rice plants should grow as rapidly as possible at
the early stage by applying much basal fertilizer and
quick-acting nitrogen fertilizer. The total number of
the tillers was controlled by regulating the irrigation.
Topdressing fertilizer was applied at the booting stage
in order to enlarge the panicle. It is feasible to develop
a kind of compound fertilizer suitable for plant growth
and development of hybrid rice parents.