CAJ | 학술논문

以近年审定的20个杂交中稻品种为材料，研究了分蘖期和抽穗期淹涝胁迫对杂交中稻的某些生理指标、生长发育、产量及干物质生产的影响。结果表明：（1）淹没胁迫对杂交中稻的生育期有显著影响。分蘖期受淹没胁迫，头季稻和再生稻的抽穗期分别平均延长了3.25 d和3.95 d，成熟期分别平均延长了1.85 d和2.75 d；而抽穗期受淹没胁迫，成熟期会提前，平均提前1.60 d，且品种间差异较大。（2）淹没胁迫对杂交中稻的产量有显著影响。与对照相比，分蘖期受淹没胁迫，分蘖期叶干重、有效穗数、每穗粒数降低，使其平均减产59.0%；齐穗期受淹没胁迫，每穗粒数和结实率显著降低，使其平均减产57.6%。（3）分蘖期受淹没48 h后，不宜割苗蓄留再生稻，应以加强田间管理保留头季稻为主，耐淹性较强的品种有川谷优6684、冈优169和乐优198；抽穗期受淹没48 h后，则以割苗蓄留再生稻较佳，其中冈优169、内5优317、蓉优22和川谷优6684的产量较高。（4）分蘖期和抽穗期耐淹组合间没有相关性，生产上应分别在各时期筛选相应耐淹能力较强的品种。
이근년심정적20개잡교중도품충위재료，연구료분얼기화추수기엄로협박대잡교중도적모사생리지표、생장발육、산량급간물질생산적영향。결과표명：（1）엄몰협박대잡교중도적생육기유현저영향。분얼기수엄몰협박，두계도화재생도적추수기분별평균연장료3.25 d화3.95 d，성숙기분별평균연장료1.85 d화2.75 d；이추수기수엄몰협박，성숙기회제전，평균제전1.60 d，차품충간차이교대。（2）엄몰협박대잡교중도적산량유현저영향。여대조상비，분얼기수엄몰협박，분얼기협간중、유효수수、매수립수강저，사기평균감산59.0%；제수기수엄몰협박，매수립수화결실솔현저강저，사기평균감산57.6%。（3）분얼기수엄몰48 h후，불의할묘축류재생도，응이가강전간관리보류두계도위주，내엄성교강적품충유천곡우6684、강우169화악우198；추수기수엄몰48 h후，칙이할묘축류재생도교가，기중강우169、내5우317、용우22화천곡우6684적산량교고。（4）분얼기화추수기내엄조합간몰유상관성，생산상응분별재각시기사선상응내엄능력교강적품충。
The physiological and growth characteristics, yield formation and dry matter production of 20 mid-season hybrid rice com-binations administrated recently were investigated under submergence stress at tillering stage and heading stage. The results showed that: (1)The growth period of mid-season hybrid rice combinations were significantly affected by submergence stress. Under submer-gence stress at tillering stage, the heading stage of main crop rice and ratoon rice were delayed by 3.25 d and 3.95 d, the maturity stage were delayed by 1.85 d and 2.75 d respectively;however, the maturity stage were decreased by 1.60 d under submergence stress at heading stage. (2)The yields were significantly affected by submergence stress. Compared to the contrast, the yields of hybrid rice combinations with submergence stress at tillering stage decreased by 59.0%, because of the decrease of leaf dry matter, effective pani-cles and grain number per panicle; the yields of hybrid rice combinations with submergence stress at heading stage decreased by 57.6%, because of the decrease of grain number per panicle and seed setting rate. (3)Strengthen field management to retain the first season rice was better than cutting seedling for growing ratoon rice after 48 h submergence stress at tillering stage, however, planting ratoon rice was a good chance after 48 h submergence stress at heading stage. (4)The submergence tolerance in tillering stage and heading stage is not relevant, the flooding resistance ability should be tested indifferent growth stage in rice production.