水稻旱涝胁迫条件下的Morgan模型研究

Morgan Model of Rice under Alternating Stress of Drought and Waterlogging

为了构建旱涝胁迫条件下水稻Morgan模型,以稻田水位作为水稻灌排调控指标,以测坑试验为基础,分析了旱涝交替胁迫对水稻干物质积累的影响,构建了以田间水位超过田间适宜水深上限的累积值和地下水位低于适宜埋深下限的累积值为自变量的修正系数,建立了水稻旱涝胁迫条件下的Morgan模型。结果表明,先涝后旱条件下受涝敏感指数中由大到小为:抽穗开花期>分蘖期>乳熟期>拔节孕穗期;受旱敏感指数由大到小为:拔节孕穗期>抽穗开花期>分蘖期>乳熟期,该结论与静态模型分析结果一致。

Water level was used as the paddy irrigation and drainage regulatory indicator,based on pit test,theoretical analysis and numerical calculation,the effects of alternative stress of drought and waterlogging on drymatter accumulation of rice were researched.A Morgan model was established,using field-groundwater level which exceeded the appropriate level as independent variables,and the dry matter content of correction as dependent variables.The results showed that waterlogging sensitive index in descending order was：flowering stagetillering stagemilky stagejointing booting stage;the drought sensitivity index in descending order was：jointing booting stageheading stagetillering stagemilky period.