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《冬小麦西农979高产高效水氮组合研究及其效应分析-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第48卷第3期河南农业大学学报Vo1.48No.32Ol4年6月JournalofHenanAgricuhuralUniversityJun.2014文章编号:1000—2340(2014)03—0263一O6冬小麦西农979高产高效水氮组合研究及其效应分析姜玉梅,李磊,程铭正,宋晓婷,卢张艳,孙倩,尹钧(河南农业大学国家小麦工程技术研究中心,河南郑州450002)摘要:为了解强筋小麦西农979高产高效生产需水需肥规律,为其高产高效标准化栽培提供依据.在大田条件下.研究了冬小麦品种西农979在不同水氮耦合条
2、件下小麦花后旗叶叶绿素含量、光合速率的变化,灌水和氮肥利用率以及最终产量和产量构成要素的表现.结果表明,中水中氮(wN)和中水高氮(wN)水肥耦合有利于小麦花后维持较高的旗叶叶绿素含量和光合速率.较长时间保持高叶绿素含量和高光合速率;在0—300kg·hm的施氮量范围内,小麦产量随着施氮量的增加而增加,氮肥效率表现出先增加后降低的规律;随着灌水量的增加,小麦产量先增加后降低,水分利用效率随着灌水量的增加而降低;本试验条件下,WN(灌水量为田间持水量60%+300kg·hm施氮量)处理产量最高,为8648.4
3、9kg·hm~,w2N处理(灌水量为田间持水量60%+l50kg·hm施氮量)产量为7944.14kg·hm~,相比最高产降低8.87%,差异不显著,但wN处理下的氮肥农学效率最高,并且显著高于其他处理,因此,wN为本试验条件下最为高效的施肥灌水处理.关键词:西农979;水氮耦合;水分利用效率;氮肥农学效率;高产高效中图分类号:S512.1文献标志码:AInvestigationandanalysisoftheefectofwaterandnitrogencouplingonhighyieldandhigh
4、eficiencyinwinterwheatXinong979JIANGYn—mei,LILei,CHENGMing—zheng,SONGXiao—ring,LUZhan—yan,SUNQian,YINJun(NationalEngineeringResearchCenterforWheat,HenanAgriculturalUniversity,Zhengzhou450002,China)Abstract:Experimentswereconductedinordertostudystronggluten
5、Xinong979’Swaterandfertiliz-errequirementruletoprovidescientificbasisforitsstandardizedcultivationofhighyieldandhigheffi—ciency.Underfieldconditions,takingwheatcultivarXinong979asthetestmaterial,westudiedtheeffectsofwaterandnitrogencouplingonthechangeofchl
6、orophyllcontentandphotosyntheticrateofflagleafafteranthesis,andthenthewaterandnitrogenuseeficiency,yieldandtheperformanceofthecomponentsofwinterwheat.Theresultsofthisexperimentshowedthat,thetreatmentsofW2N2andW2N3hadtheadvantageofmaintaininghighchlorophyll
7、contentandhighratewithalongertime.Thewheatyieldincreasedwiththeincreaseofnitrogensupplyonascaleof0—300kg·hmnitrogenapplicationrange,withthenitrogensupplyincreasing,theNuseefficiencyfirstincreased,thereafterre—duced.Withtheirrigationamountincreasing,thegrai
8、nyieldfirstincreased,thereafterreduced,thewateruseeficiencydecreasedwiththeirrigationamountincreasing.Undertheexperimentalcondi—tions,themaximumyieldtreatmentwasW2N3(60%ofthelargestcapacityfieldand300kg·hmnit
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