水稻秧苗插植支數對產量之影響

為瞭解北部地區水稻品種‘臺稉14號’及‘桃園3號’的插秧支數對產量之影響，本試驗以每株不同苗數插植（1支、5支、10支、15支及20支）作為試驗處理，調查產量及其構成要素。試驗結果顯示，插植支數對株高及產量無顯著影響，但對每株穗數及每穗粒數皆有顯著影響；另稔實率及千粒重在不同插植苗數處理下或有差異，但在期作與品種間趨勢不一。當秧苗插植數為1支時，其收穫時每株穗數（8.3-15.2穗）最少、穗長（18.3-19.7 cm）最長、每穗粒數（95.1-131.7粒／穗）最多，隨著秧苗插植支數增加，每株穗數亦增加，而穗長及每穗粒數隨之減少；當秧苗插植數為20支時，每株穗數（16.6-21.5穗）最多、穗長（15.6-17.1 cm）最短、每穗粒數（52.1-68.4粒／穗）最少；而稔實率多隨支數增加而有下降趨勢，唯‘桃園3號’在二期作之結果相反。綜合以上結果，推測得知每株穗數及每穗粒數具有強烈之互補作用，而使各處理之產量處理間差異未達顯著水準。

關鍵字

水稻插植支數；產量；產量構成要素

並列摘要

The purpose of this experiment was to understand whether the production of paddy rice varieties ”Taikeng No. 14” and ”Taoyuan No. 3” would be affected by different numbers of transplanted seedling in northern region of Taiwan. For each cavity, 1, 5, 10, 15 and 20 rice seedlings were transplanted as experimental treatments, and the grain yield and yield components were investigated at harvest period. Generally, the different numbers of transplanted seedlings as treatments would not significantly influence on plant height and grain yield, but not on panicle length, panicles per plant, and spikelets per panicle. The results of seed-set and 1000-grain weight were slightly affected, but there was no consistent tendency for varieties or crop seasons. Compared with the results of different transplanted seedling numbers, the least panicles per hole, longest panicle length, and the most amount of spikelets per panicle were observed when one seedling was transplanted. The more numbers of seedlings were transplanted, the more panicles per hole were found, while spikelets per panicle and the average panicle length were reduced. When twenty seedlings per hole were transplanted, the most panicles per hole, shortest panicle length, and the fewest spikelets per panicle were found. The declined trend of seed-set percentage was observed when more seedlings were planted, but the result of ”Taoyuan No. 3” was not agree with it in the second crop season.

並列關鍵字

rice transplanted seedlings ； grain yield ； yield components

國際替代計量

水稻秧苗插植支數對產量之影響

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