文档介绍：施氮量和底施追施比例对土壤硝态氮和铵态氮含量时空变化的影响3马兴华1 于振文133 梁晓芳1 颜红2 史桂萍2(1山东农业大学农业部小麦栽培生理与遗传改良重点开放实验室,泰安271018;2龙口市农业技术推广中心,龙口265701【摘要】研究了高产栽培条件下,不同施氮量和底施追施比例对土壤硝态氮和铵态氮含量时空变化的影响,,,氮肥全部用于,降低了氮素向深层的淋洗;量;增加了成熟期0~,hm-168kg・hm-2,降低了挑旗期土壤硝态氮,,施氮量为168kg・hm-2且全部用于拔节期追施的处理籽粒蛋白关键词施氮量底施追施比例土壤硝态氮土壤铵态氮籽粒产量籽粒蛋白质含量文章编号 1001-9332(200604-0630-05 中图分类号 S15813 文献标识码 AEffectsofnitrogenapplicationrateanditsbasal2/top2dressingratioonspatio2temporalvariationsofsoilNO3-2NandNH4+,YUZhenwen1,LIANGXiaofang1,YANHong2,SHIGuiping2(icsImprovementofAgricultureMinistry,ShandongAgriculturalUniversity,Taian271018,China;2AgrotechnicalExtensionCenterofLongkouCity,Longkou265701,.,2006,17(4:630~,thispaperstudiedthespatiotemporalvariationsofsoilNO3-2NandNH4+2Ncontentsasaffectedbydifferentnitrogenapplicationrateanditsbasal2/top2dressingratio,,applyingallfertilizernitrogenatjointingstagedecreasedthesoilNO3-2Ncontentandapparentsurplusofsoilnitrogenbeforejointingstage,-2Ncontent,butincreasedsoilNH4+-2Ncontentin0~60cmand0~・hm-2offertilizernitrogenatjointingstage,applying168kg・hm-2offertilizernitrogenatthesamestagedecreasedthesoilNO3-2NandNH4+2Ncontentsatflaggingstage,soilnitrogendeficitfromflaggingtomaturingstage,andsoilNO3-,butapplyingall168kg・hm- Nitrogenapplicationrate,Basal2andtop2dressingratio,SoilNO3-2Ncontent,SoilNH4+2Ncontent,Grainyield,Grainprote