日長對水稻栽培品種抽穗及農藝性狀之影響

Effects of Daylength on Rice Heading Date and Agronomic Characters

張瑪利(Mary Chang) ； 羅正宗(Jeng-Chung Lo) ； 劉景平(Ching-Ping Liu)

《作物、環境與生物資訊》 3卷2期 (2006/06) Pp. 147-158

https://doi.org/10.30061/CEB.200606.0004

摘要

本研究於2004年一、二期作，以10、11、12、13、14及15小時等六種不同日長進行處理，探討對9個水稻栽培品種抽穗日數及其他農藝性狀之影響。結果發現第一期作9個水稻品種之抽穗日數均以日長12小時處理為最短，日長低於或高於12小時，其抽穗日數均有增加之趨勢，尤以長日條件下增加之日數更為顯著；第二期作試驗結果顯示，9個水稻品種之抽穗日數則以日長10小時處理為最短，抽穗日數是隨著日長增加而增加，顯示9個水稻品種在不同期作之最適日長會有所差異。除了第二期作稔實率及千粒重之外，兩期作之產量構成因素均以日長15小時處理較佳，顯示在長日環境下水稻產量會有增加趨勢。另外，水稻之總葉數方面，兩期作結果均顯示，長日環境下9個參試品種均較短日環境下為多。

關鍵字

水稻 ； 日長 ； 抽穗日數

並列摘要

In the first and second crop seasons of 2004, different daylengths were treated to investigate their effects on heading date and other agronomic characters of 9 rice cultivars. Daylengths in this study referred to 10, 11, 12, 13, 14 and 15 hours, respectively. The results indicated that heading date was the shortest under the 12-hour daylength treatment for the first cropping season. The heading date increased when the daylength was longer or shorter than 12 hours-especially the longer daylength. For the second cropping season, the heading date was the shortest under the 10-hour daylength. The heading date increased when the daylength was longer than 10 hours. Results indicated that optimum daylength varied in different cropping seasons. Except for the percent filled grains and 1000-grain weight of the second cropping season, the yield components were the highest under 15-hour daylength. Results suggest that yields of paddy rice tended to increase in longer daylength conditions. Leaf number of paddy rice in both cropping seasons was larger in the longer daylength treatments than those of the shorter ones.

並列關鍵字

Rice ； Daylength ； Heading date