中文摘要：

为给稻田套播小麦优质高产栽培提供理论依据,在江苏淮北地区通过大田试验,研究氮肥运筹比例对稻田套播强筋小麦花后旗叶叶绿素含量、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量和籽粒产量的影响。结果表明,在总施氮量(240 kg.hm-2)相同条件下,随拔节肥和孕穗肥施氮比例的上升,小麦产量、氮肥偏生产力(PFP)和氮肥农学效率(NAE)逐渐升高,但后期施肥比例过高,产量有所下降,以基肥∶分蘖肥∶拔节肥∶孕穗肥为3∶3∶2∶2的处理籽粒产量、PFP和NAE最高。随花后生育进程的推移,小麦旗叶叶绿素含量和SOD活性呈单峰曲线变化,MDA含量呈上升趋势。随拔节肥和孕穗肥施用比例的提高,旗叶叶绿素含量和SOD活性下降速率变缓,MDA含量上升速率也减缓。本试验条件下,基肥∶分蘖肥∶拔节肥∶孕穗肥施用比例为3∶3∶2∶2的氮肥运筹方式有利于减缓花后旗叶衰老,提升氮肥利用效率,提高粒重和产量。

英文摘要：

Wheat interplanted in paddyfield,which was a light and predigesting cultivation method,was applied widly in rice and wheat growing areas.The effects of different N application ratio on chlorophyll content,SOD activity,MDA content in flag leaves after anthesis and grain yield in strong-gluten wheat interplanted in paddyfield were studied.Grain yield,partial factor productivity of applied N(PFP) and nitrogen agronomic efficiency(NAE) increased as the proportion of jointing and booting N fertilizer increased,b...