氮肥分配对冬小麦—夏玉米轮作产量和氮肥效率的影响的中期报告.docx

氮肥分配对冬小麦—夏玉米轮作产量和氮肥效率的影响的中期报告
摘要：
本研究旨在探究氮肥分配对冬小麦—夏玉米轮作系统下作物产量和氮肥利用效率的影响。采用田间试验的方法，将不同氮肥分配方案分为四组，分别是：冬小麦期施氮量60kg/hm²，夏玉米期施氮量150kg/hm²；冬小麦期施氮量80kg/hm²，夏玉米期施氮量120kg/hm²；冬小麦期施氮量100kg/hm²，夏玉米期施氮量100kg/hm²；冬小麦期施氮量120kg/hm²，夏玉米期施氮量80kg/hm²。结果显示，施氮总量相同的情况下，氮肥分配方案对作物产量和氮肥利用效率具有显著的影响。冬小麦期施氮量高、夏玉米期施氮量低的氮肥分配方案能够提高夏玉米的产量，并且提高氮肥利用效率；相反，冬小麦期施氮量低、夏玉米期施氮量高的氮肥分配方案则降低了夏玉米的产量，并且降低了氮肥利用效率。因此，合理的氮肥分配方案对于冬小麦—夏玉米轮作系统的高效运行具有重要的意义。
关键词：氮肥分配；冬小麦；夏玉米；产量；氮肥利用效率
Abstract:
Theaimofthisstudyistoinvestigatetheeffectsofnitrogenfertilizerallocationoncropyieldandnitrogenfertilizerutilizationefficiencyinawinterwheat-summermaizerotationsystem.Fieldexperimentswereconductedwithfourdifferentnitrogenfertilizerallocationschemes,whichwere:60kg/hm²nitrogenfertilizerappliedinwinterwheatseasonand150kg/hm²nitrogenfertilizerappliedinsummermaizeseason;80kg/hm²nitrogenfertilizerappliedinwinterwheatseasonand120kg/hm²nitrogenfertilizerappliedinsummermaizeseason;100kg/hm²nitrogenfertilizerappliedinwinterwheatseasonand100kg/hm²nitrogenfertilizerappliedinsummermaizeseason;and120kg/hm²nitrogenfertilizerappliedinwinterwheatseasonand80kg/hm²nitrogenfertilizerappliedinsummermaizeseason.Theresultsshowedthatthenitrogenfertilizerallocationschemehadasignificantimpactoncropyieldandnitrogenfertilizerutilizationefficiencywiththesametotalamountofnitrogenfertilizerapplied.Thenitrogenfertilizerallocationschemewithhighnitrogenfertilizerappliedinwinterwheatseasonandlownitrogenfertilizerappliedinsummermaizeseasoncouldincreasetheyieldofsummermaizeandimprovethenitrogenfertilizerutilizationefficiency;onthecontrary,thenitrogenfertilizerallocationschemewithlownitrogenfertilizerappliedinwinterwheatseasonandhighnitrogenfertilizerappliedinsummermaizeseasondecreasedtheyieldofsummermaizeandnitrogenfertilizerutilizationefficiency.Therefore,areasonablenitrogenfertilizerallocationschemeisofgreatsignificancefortheefficientoperationofthewinterwheat-summermaizerotationsystem.
Keywords:nitrogenfertilizerallocation;winterwheat;summermaize;yield;nitrogenf