• 作者： 羅其正; 鄔宏潘; 姚?香
• 作者服務機構： 中央研究院植物研究所
• 中文摘要： 稔實率太低是二期作低產之主要原因，在南港以三品種利用生育後期穗肥的控制進行試驗，結果顯示生育控制方式由於水稻生殖生長期時根系吸收不良，致效果不大。影響期作間稔實情形者主要為氣象因素，其中以日照量影響較大，二期作抽穗後日照量太低，致同化物質來源不足是稔實率低落的原因。
• 英文摘要： Low ripened rate has been the major pro-blem in the productivity of 2nd crop rice. 4different fertilizer applications were managed atthe heading stage of 3 rice varieties in Nan-kang. Effect of the treatments was offset by thedeterioration of the root system at the reproduc-tive stage. Difference of the ripened rate be-tween 2 crop seasons was determined by climatefactors of which solar irradiation was dominant.Insufficient photosynthetase supply resulting fromlow solar irradiation after the heading stage inthe 2nd crop affected the ripened rate.
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