氮肥种类对水稻生长发育和稻谷产量与品质的影响

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1、DECLARATIONTheauthordeclaresthatthisworkwascarriedoutbyhimselfundertheguidanceandsupervisionofDrJinhongChenoftheDepartmentofAgronomy，collegeofAgricultureandBiotechnology，ZhejiangUniversity，Hangzhou，PeoplesRepublicofChinaandthatthasnotbeensubmittedbyanypersonforadegreeinanyotheruniversit

2、yAuthour：M．AJallohSign．Supervisor：JinhongChen(Ph．D)Sign．沪甘炒CERTIFICATIONIcertifythattheresearchreportentitledTheeffectofNitrogenfertilizerformsongrowth，yieldandgrainqualityinrice(OryzasativaL．)SubmittedbyMohamedA．JallohforthedegreeofMasterinAgronomy，specializinginCropScienceisbasedonres

3、ultsofstudiescarriedoutintheAgronomyDepartment，ZhejiangUniversity，Hangzhou，PeoplesRepublicofChina．ThereportorpartofithasnotbeenpreviouslysubmittedforadegreetoanyotheruniversitySupervisor：JinhongChen(Ph．D)SignIIACKNOWLEDGEMENTInthenameofAllahinwhosepowerandgracethispieceofworkgottoitssuc

4、cessfulend，Idowishtoregistermysincerestthanksandappreciationtothemanyorganizations，groupsandindividualswhocontributedinonewayortheothertomysuccessfulstayandstudyinchina．IamverygratefultothegovernmentsoftheRepublicofSierraLeoneandthePeople’sRepublicofchinathroughwhosediplomaticandfratema

5、lrelationshipbroughttothefulfillmentofmyacademicdreams，hopesandaspirations．ThismaynothavebeenpossiblewithoutthespaceandconduciveatmosphereprovidedbytheadministrationoftheZhejiangUniversity，theDivisionofForeignStudents，theDivisionofGraduateStudiesandtheentirestaffoftheDepartmentofAgronom

6、y，towhomIremainindebted．MysincerestthankstoDr．JinhongChenunderwhosevaluableguidanceandsupervisionthisworkwasdone．IamalsogratefultotherestoftheteachingandsupervisoryboardwithspecialreferencetoProf．GuopingZhang．ThesamethankstoDrFeiboWu，ProfessorWeijunZhou，Dr．JinxinChen，DrRenmingWang．Manyt

7、hankstomycolleaguesintheforeignstudentsbuildingwhosecompanymademystayahappyone．1wishtomakementionofthefriendlinessofmyChinesefriends，WuChunhua，ChenFeiandotherswhoinonewayoranotherhelpedmeduringmycauseofstudies．Iamgratefultomycountrymatesstudyingindifferentcitiesinchinawhowereal