玉米涝渍胁迫的水分产量关系试验研究

在原状土测坑采用原位受淹法,对玉米苗期、拔节期、抽雄吐丝期、成熟期实施受淹试验。结果表明,不同生育期涝渍胁迫降低了玉米产量,苗期、拔节期淹水处理后,株高、抽雄和吐丝的日期分别受到抑制和推迟;玉米各个生育期对涝渍胁迫的敏感顺序依次为,苗期>拔节期>抽雄吐丝期>成熟期;玉米相对产量与涝渍指标SDI30、SDI50、SDI80呈良好的线性关系,且与SDI50相关性显著。改进的作物水分生产函数模型合理,具有可行性。所得涝渍综合指标对排水系统的设计与运行管理有参考价值。

Experimental Study of Relationship between Water and Yield of Maize

Experimental study on combined controlling of surface and subsurface water logging in undisturbed test pits where maize planted was carried out.The study results showed that the maize yield decreased,meanwhile,the height of maize and the day of tasseling and silking were respectively inhibited and delayed for Seedling and jointing stage water logging.The susceptibility in four phases of maize was ranked as follows: Seedling>jointing>tasseling-silking>maturity.There were good linear relations between the relative yield of maize and the SDI30,SDI50,SDI80,as well as the relationship between SDI50 and field was significant correlation.The new water production functions were reasonable and feasible.Composite index from water logging such as SFEW50 and SDI50 could be helpful for drainage system design and for operation & maintenance of the drainage farmland project in Huaibei plain.