水稻莖稈細觀結(jié)構(gòu)及其力學(xué)性質(zhì)的關(guān)系研究.pdf

1、重慶大學(xué)碩士學(xué)位論文水稻莖稈細觀結(jié)構(gòu)及其力學(xué)性質(zhì)的關(guān)系研究姓名：段傳人申請學(xué)位級別：碩士專業(yè)：生物醫(yī)學(xué)工程指導(dǎo)教師：王伯初19991001重慶大學(xué)碩士學(xué)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