5个冬青品种枝条抗弯力学特性及其与理化性质的关系

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中图分类号：S687；TS611 文献标志码：A 文章编号：1000-2006（2025）05-095-08

Abstract：【Objective】Toscreen Ilexvarietiessuitablefortopiaryandto investigatetheinfluencing mechanismsof chemical compositionandphysical propertieson theflexural mechanical characteristics of branches，providing a theoreticalbasis forselectingother Iexvarieties fortopiary.【Method】FiveIlexvarieties—lexcassine‘Angustifolia'， I.בNellie R.Stevens’）， 1.x attenuata‘Sunny Foster’，I.decidua‘Hongmanao’，and ，verticillata‘Winter Red' - were selectedas research subjects.The flexural forceand flexural modulus of elasticity（MOE）in bending of branchesacrossfivediameterclasses（2.5-7.5mm），as wellas thecontentsofcelulose，hemicelulose，andlignin，as well as microfibrilangle（MFA），andcrystalinity（Crl），were measured.【Result】（1）The flexural forceand MOEof thefive Ilexvarietiesincreased with increasing branch diameter class.Changesinthe chemicalcompositionand crystallinityexhibited trendssimilar to thoseof themechanical properties，whilethe MFA decreasedwith increasing diameter class.（2）Significant differences（ P<0.05 ）in flexural force and MOE were observed among the five varieties.‘Hongmanao’exhibited thehighestvaluesforbothflexuralforceandMOE，whereas‘WinterRed’exhibited thelowest.（3）Cellosecontent，holocellulosecontent，and crystallinityshowed significant positive correlationswith branch MOE，while the MFA showed a significant negative correlationwith MOE（ P<0.05 ）.【Conclusion】The MOE of‘Winter Red’（MOE：154.88-645.87 MPa）and‘NelieR. Stevens’（MOE：212.09-772.00 MPa）was significantlylowerthanthatof theother varieties，indicating their branches possess greater flexibilityandare thus more suitable for topiary.Cellulosecontent，holocellosecontent，MFA，andcrystallnityare identifiedaskeyfactors influencingtheflexural properties of branches.

Keywords：Iex;branches;flexural modulus of elasticity;microfibril angle;cellulose;crystallinity

植物造型是根据植物本身特点，结合拿弯、编织、修剪等专业技法，按创造者的审美以植物为材料进行造型的艺术[1]。（剩余19011字）