【摘要】 采用盆栽、小区淹水相结合的方法，研究了中稻在拔节期、孕穗期、抽穗期不同淹水深度和淹水时间胁迫对中稻产量的影响。结果表明，中稻抽穗期对淹水胁迫最为敏感，其次是孕穗期，拔节期影响相对较小。中稻在各发育期遭受淹水胁迫，穗粒数、穗结实粒数、结实率下降，空秕率增加，淹水深度越深、时间越长，对产量影响越大，其减产率与淹水深度、淹水时间呈显著正相关，在拔节期没顶淹水时间每增加1 d，减产率增加19.3%；拔节期、孕穗期、抽穗期，淹水2/3株高深度，淹水时间每增加1 d，减产率分别增加3.3%、5.7%、6.9%。更多还原

【Abstract】 Pot culture and plot flooding were used to study the effects of different flooding depth and flooding time stress on the yield of medium rice at jointing stage,booting stage and heading stage. The results showed that the flooding stress susceptibility of development stage was heading stage>booting stage>jointing stage. After flooding stress,effective spike number,grain number and seed setting rate declined,while sterile grain rate improved. The deeper the flooding depth and the longer the flooding time,the greater the impact on the yield,and the yield reduction rate was significantly positively correlated with the flooding depth and flooding time. In jointing stage,with submerged flooding,the reduction rate should be increased by 19.3% per day;With 2/3 plant height flooding,the reduction rate should be increased by 3.3%,5.7% and 6.9% per day,respectively,in jointing stage,booting stage and heading stage.更多还原