天水沓에서의 灌漑條件이 陸稻의 生育과 收量에 미치는 影響 = Effect of Irrigation on the Yield and Growth of Upland Rice in Rainfield

다국어 초록 (Multilingual Abstract)

This study deals with the differences of the characters and yield of 14 upland and 2 paddy field rice varieties cultivated under full time irrigated, unstable irrigated by rainfall and drained rainfield conditions.
Under drainedrain field condition, heading and maturing dates were delayed; ratio of effective tiller, fertilated grain and matured grain, weight of winnowed paddy, brown rice and 1000 grains weight restrained; but number of tillers and spikelets and weight of straw were high.
Under unstable and full time irrigated conditions, growth and yields were similar or the former was more suitable to the upland rice varieties. It is estimated that the vegetative growths were superior and the reproductive growths or maturing were not inferior under unstable irrigated condition, but the inferiority was remarkable in paddy rice varieties.
The low yield under the drained condition seemed to be caused mainly by decrease of weight of winnowed paddy, 1000 grains weight and ratio of matured grain.