冬季或移栽前灌水与氮素耦合对烤烟生长和产质量的影响

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1、英文摘要Effectsofirrigatedinwinterorbeforetransplantingandnitrogencouplingonthegrowing，yieldandqualityofflue-curedtobaccoSupervisor：Pro￡LiuGuoshunMasterCandidate：WangPeiAbstract：In2008，atwo—factorssplicingplotexperimentWaSemployedtostudytheeffectofirrigatedinwinteronthesoilwate

2、rcontentofO～60cmsoillayer,thechangeofreadilyavailablenutrientofsoil；theeffectsofirrigatedinwinterorbeforetransplantingandnitrogencouplingonthedynamicchangeofsoilwatercontentandthealkali-hydrolyzablenitrogenof0-'--60cmsoillayer,andonthegrowth，yield，qualityandthemajoreconomic

3、charactersofflue—curedtobacco．1TheeffectsofirrigatedinwinteronthesoliwatercontentandthecontentsofreadilyavailablenutrientTheirrigatedinwintertreatmentincreasedthewatercontentof0～60cmsoillayersignificantly,andespeciallyplayedailimportantroleonthedeepsubsoilwatercontent．Atdif

4、ferenttime，thecontentofalkali—hydrolyzablenitrogenof0"--60cmsoillayerWaslowerthanCK,butthecontentsofrapidlyavailablephosphorusandrapidlyavailablepotassiumweresignificanthigherthanCK．2Theeffectsofirrigatedinwinterorbeforetransplantingandnitrogencouplingonthegrowthofflue-cure

5、dtobaccoDifferentirrigationtreatmentsallincreaSedthemaximumleafarea,stemgirth，plantheight，availableleavesanddrymaterialaccumulationofflue—curedtobacco，alsopromotedtheearlyrapidgrowthandthegrowingdevelopmentoftheflue—curedtobacco．Undertherangeofnitrogen30---75kg‘hm之，theallbo

6、taniccharacterswereincreasedwitlltheincreasingofnitrogen-appliedamount．Theresultofinteractionofirrigationandnitrogen-appliedamountWasthattheirrigatedinwinterandbeforetransplantingtreatmentunderthenitrogen·appliedamount75kg·hm-2wasbestforthegrowingdevelopmentoftheflue—curedt

7、obacco．3TheeffectsofirrigatedinwinterorbeforetransplantingandnitrogencouplingonthesoilwatercontentDuringthewholegrowingperiod，thesoilwatercontentof0--。60cmsoillayerofdifferentirrigationtreatmentswereallhigherthanCK，andthatcontentoftheirrigatedinwinterandbeforetransplantingt

8、reatmentWashighest．Thesoilwatercontentof0，’、，40cmsoillayerWasincreasedslightlywith