Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/71543
DC FieldValueLanguage
dc.contributor.authorHuang, Y.S.en_US
dc.contributor.authorHung, L.F.en_US
dc.contributor.authorKuo-Huang, L.L.en_US
dc.date2010zh_TW
dc.date.accessioned2014-06-11T06:01:53Z-
dc.date.available2014-06-11T06:01:53Z-
dc.identifier.issn0931-1890zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/71543-
dc.description.abstractBending movement of a branch depends on the mutual interaction of gravitational disturbance, phototropic response, and gravitropic correction. Four factors are involved in gravitropic correction: asymmetric growth strain, eccentric growth increment, heterogeneous longitudinal elasticity (MOE), and initial radius which are associated with reaction wood production. In this context, we have developed a simplified model to calculate the rate of curvature change by combination of these factors. Experimental data from Taiwan red cypress were used to test the validity of the model. Our results show clearly that asymmetric growth strain is the main factor involved in correction. Eccentric growth increment has positive efficiency and increases correction in addition to growth strain, while the total effect of longitudinal MOE variation has negative efficiency and decreases correction. Spring-back strain measurement is found to be useful for the measurement of self-weight bending moment of branch. The branches studied are essentially close to a biomechanical equilibrium which maintains branches in horizontal positions. In the case of a deciduous dicotyledonous tree, flamegold, the effect of defoliating behavior on measured growth strain and curvature change was formulated by a modified model. Growth strain is the sum of measured growth strain after defoliation and spring-back strain during defoliation. The curvature change can be calculated by using measured growth strain and spring-back strain after defoliation. These results show that full-leaf branches of flamegold have a tendency to bend downward, but defoliated branches have a tendency for upward bending. The efficiency of correction increased after defoliation due to weight loss.en_US
dc.language.isoen_USzh_TW
dc.relationTrees-Structure and Functionen_US
dc.relation.ispartofseriesTrees-Structure and Function, Volume 24, Issue 6, Page(s) 1151-1161.en_US
dc.relation.urihttp://dx.doi.org/10.1007/s00468-010-0491-0en_US
dc.subjectChamaecyparis formosensisen_US
dc.subjectDefoliationen_US
dc.subjectKoelreuteria henryien_US
dc.subjectGravitropicen_US
dc.subjectcorrectionen_US
dc.subjectGravitational disturbanceen_US
dc.subjectReaction wooden_US
dc.subjectpinus-contorta douglen_US
dc.subjectnegative gravitropismen_US
dc.subjectinternal-stressesen_US
dc.subjectcompression wooden_US
dc.subjecttree formsen_US
dc.subjectmaturationen_US
dc.subjectgenerationen_US
dc.subjecttrunksen_US
dc.subjectoriginen_US
dc.subjectaciden_US
dc.titleBiomechanical modeling of gravitropic response of branches: roles of asymmetric periphery growth strain versus self-weight bending effecten_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1007/s00468-010-0491-0zh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeJournal Article-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
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