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ID:39143810
大小:2.76 MB
页数:40页
时间:2019-06-25
《种植密度、氮肥运筹和覆膜方式对春玉米花后衰老的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、The1eafareaindexunderdifferentfilm.coveringmodeswascovetingfilmbetweenfurrows>covetingfilmupfurrows>CKafteranthesis50d,CKsignificantlylowerthanothertreatedconditionsfromanthesis20d.CKtreatmenthashighersenescencerateofleavesthanfilm-covetingtreatmentexceptaftersilkinglO
2、d,andcoveringfilmupfurrowssenescencerateofleaveshigherthanfilmbetweenfurrows.Atthesilkingandmilkingstage,thelevelofchlorophyllcontentindifferenttreatmentstrendsshowedCKlargestandthesmallestcoveringfilmupfurrows,covetingfilmbetweenfurrowslaminatingcentered.activityofSOD
3、andPODofleavessilkingstageishigherthanmilkingstage,covetingfilmupfurrowsshowedhigherleafenzymeactivitiesandlowercontentofMDA.Keywords:@ringMaize;PlantingDensity;NitrogenApplication;Film—coveringModes;PhysiologicalCharacteristicsDirectedby:prof.YANGHengshanAppIicantforM
4、asterdegree:XiaoLi(Cropscience)(AgronomyCollege,InnerMongoliaUniversityforNationalities,TongLiao028043,China)目录中文摘要英文摘要l前言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..Il刖舌⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..I.1玉米在我国粮食增产中的作用⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.il.2玉米早衰的过程及对产量形成的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯.I1.3影响玉米早衰的因素及其研究进展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21.4本文研究的目的与
5、意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.32材料与方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.42.1试验地自然概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.42.2试验年度生长季内气象条件⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯42.3试验设计⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.42.3.1种植密度对春玉米衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯..42.3.2氮肥运筹对春玉米衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯..52.3.3不同覆膜方式对春玉米衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯.52.4测定项目与方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.52.5数据处理与统计分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯63
6、结果与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..73.1种植密度对春玉米花后衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯73.1.1叶面积指数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯73.1.2叶片衰老速率⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.93.1.3叶片酶活性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..103.1.4完熟期根系特性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.153.1.5产量及其构成因素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..193.2氮肥运筹对春玉米花后衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯..193.2.1叶面积指数⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..193.2.2叶片衰老速率⋯⋯.⋯⋯⋯
7、⋯⋯⋯⋯⋯⋯⋯⋯..203.2.3叶绿素⋯⋯⋯⋯⋯⋯..⋯⋯⋯⋯⋯⋯⋯⋯.⋯203.2.4叶片酶活性⋯⋯⋯⋯.⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.2l3.2.5根系活力⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.233.2.6产量及其构成因素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..233.3覆膜方式对春玉米花后衰老的影响⋯⋯⋯⋯⋯⋯⋯⋯⋯..243.3.1叶面积指数⋯⋯..⋯...⋯⋯.⋯.....⋯⋯⋯⋯⋯243.3.2叶片衰老速率⋯⋯⋯⋯⋯⋯.⋯⋯⋯⋯⋯⋯⋯.253.3.3叶绿素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..253.3.4叶片酶活性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.
8、263.3.5产量及其构成因素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.284结论与讨论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯294.1结论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.294.1.1种植密度对春玉米花后衰老的影响⋯⋯⋯⋯⋯⋯⋯..294.1.
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