OUTLOOK AND 40 YEARS′ REVIEW OF HIGH YIELDING CULTIVATION IN DOUBLE RICE IN HUNAN PROVINCE
Zou Yingbin (Hunan Agricultural University,Changsha,410128)
his paper reviewed 40 years′ history of high yielding cultivation in double rice in
Hunan province and summaried as 3 development periods:(1) The period from the beginning of
60s′ to the middle of 70s′ is of the panicle number cultivation modle by using short plant
varieties;(2) The period from the middle of 70s′ to the and of 80s' is of both panicle number
and large panicle cultivation modle because of the extension of indinca hybrid rice;(3)The
period in 90s′ is of the weighty panicle cultivation modle because of the application of hybrid
rice with middle plant height, large panicle and middle tillering ablity. This paper also
introduced key points of 10 high yielding techniques of representation of double rice, and
discussed the study content and characteristics of double rice cultivation development facing to
21 century.
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