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ID:39128671
大小:2.46 MB
页数:48页
时间:2019-06-25
《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》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、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
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