论文部分内容阅读
采用正交组合设计，研究了各生育期不同淹水处理对水稻的产量及产量构成因素的影响．结果表明：水稻开花期对洪涝胁迫最敏感，减产最为严重；其次是灌浆期和幼穗分化期；而分蘖期和成熟期淹水对产量影响相对较小．水稻在各生育期受淹，其减产程度与淹水深度、淹水天数呈极显著正相关．淹水对产量的影响主要表现为降低水稻结实率、有效穗数和每穗总粒数．
The effects of different flooding treatments on the yield and yield components of rice were studied by orthogonal design. The results showed that the flowering stage of rice was the most sensitive to flood stress, the most serious was the yield reduction; the second was the filling stage and young panicle differentiation stage; while the tillering stage and mature stage had less impact on the yield. Rice flooded at all growth stages, and its yield reduction was significantly and positively correlated with the depth of flooding and flooding days. The main impact of flooding on the yield was reduced rice seed setting rate, effective panicle number and total grain number per panicle.