水稻莖稈細觀結構及其力學性質的關系研究.pdf

1、重慶大學碩士學位論文水稻莖稈細觀結構及其力學性質的關系研究姓名：段傳人申請學位級別：碩士專業(yè)：生物醫(yī)學工程指導教師：王伯初19991001重慶大學碩士學位論文英文摘要AbstractThepropertyofricestemcounterpoisonisoneoftheimportantcharactersforthestyleofriceWhenwechoosetobreedthevarietiesofricecounterpoiso

2、n，somemajorpropertiesofstemarechoosedinthefieldsandindoorsItisverydifficulttofiddlethepropertiesofricestemcounterpoisonwithoutusinginstrumentinchoosingthecrossbredseedsHowever，thereisnoaelvatuationindexandmethodfortherel

3、atedresearchofthepropertiesofricestemcounterpoisonorotherpropertiesindomesticandforeignBasedontheabovereasons，theauthorfirmlyinvestigatesthesubstructuresandbehavesofmechanicsofricestemsinthispaperMeanwhile，authorgetsther

4、elationshipbetweentheabilitiesofricestemcounterpoisonandthepropertiesofvariousvarieties，suchashighstemrisemiddlestemrice，lowstemriceandcrossbredriceWehavemeasuredthepropertiesofmechanicsofvariousricevarietiesandobservedt

5、hemicrostructuresofficestemsAlltheseexperimentdatasuggestthat，thestrengthofstemthicknessofstemwall，numberanddistributionofbigvascularbundleshavepluseffectsontheresistanceofstembasebeak，andthestembaseplaysamajorroleforthe

6、resistanceofbreakThehighofrice，lengthofstemandtheheavyofsinglestachyshavenegativeeffectsontheabilityofricecounterpoisonThetensionintensitylimitandelasticmoduleofthethirdnod。arethemostlowamongsixnodesSothethirdnodeisthemo

7、stcristlefortheintensityofricestemThestrengthofstem，thicknessofstemwall，thenumberanddistributionofbigvascularbundleshavepluseffectsonthetenserintensitylimitandelasticmoduleofficestemKeywords：risestemsubstructuresbehaveso