不同耐旱能力水稻品系在節水栽培下對農藝性狀、產量與米質之影響

本研究目的在瞭解水稻耐旱突變體於節水栽培下之適應性，並探討節水對產量及米質的影響，提供在節水栽培下對耐旱適應品系選拔之參考。試驗材料採用疊氮化鈉誘變族群所選育之耐旱品系DR14與敏感品系DR2、DR9和DR34，並以耐旱品種旱育3號為對照，於插秧成活後以間歇性灌溉方式進行節水試驗。試驗結果顯示，在節水栽培下，稻米產量及其產量構成要素不受影響，但株高會發生矮化。在節水栽培下，糙米率、白米率、粗蛋白質與味度值沒有影響，對糙米的其他未熟粒百分率發生則有較低之現象，但白堊質發生率則有增加的情形。另外，由節水栽培下的產量表現結果可發現水稻誘變品系在節水栽培環境具不同適應性，其中以DR14表現最佳每公頃產量約4,963公斤以及稔實率約89.5%，顯示此品系在節水栽培下具有穩定良好之適應性。

關鍵字

水稻；節水栽培；產量；米質

並列摘要

The study aimed at the effect of agronomic traits, yield and grain quality in rice mutant lines under water saving irrigation condition. This study also provides guidelines for selecting adapted rice lines under water saving irrigation conditions. The drought tolerant and susceptible lines used in this study are DR14, a drought mutant line that derived from CNY911303 mutation pool in Chiayi Agricultural Experiment Station, and HY3, a drought tolerant control line, and DR2, DR9, and DR34 susceptible lines, respectively. The rice drought experiment in this study used an intermittent irrigation approach during maximum tilling stage. The experimental results showed that rice yield and yield components have no significant difference, but plant height has become shorter under water saving irrigation. In addition, there is no effect on brown rice production rate, milled rice production rate, crude protein, and taste meter value under water saving irrigation, but the occurrence of other unmatured rice in brown rice has reduced. In addition, the rate of occurrence of chalky kernels in milled rice has increased. The rice yield under water saving irrigation shows that there are different adaptations among rice mutant lines. Among the DR14 has the best performance with stable and good adaptation because its yield was 4963 kg/ha and sterility rate was 6.3%.

並列關鍵字

Rice ； water saving irrigation ； yield ； grain quality

國際替代計量

不同耐旱能力水稻品系在節水栽培下對農藝性狀、產量與米質之影響

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