基于无节柱材培育的修枝对杉木木材材性的影响

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中图分类号：S791.27 文献标志码：A 文章编号：1000-2006（2026）02-0179-08

Abstract：【Objective】This research aims to compare the efects of pruning and non-pruning on thephysical and mechanical propertiesofChinesefir（Cunninghamia lanceolata）woodandtoprovideascientificbasis forthecultivation of large-diameter，knot-free timber.【Method】A17-year-oldChinesefirplantationwasselectedasthestudysite.A randomized block design was implemented with two treatments：pruning and non-pruning.Twentyyears after pruning， the mean sample tree method was employedto select representative pruned andnon-pruned trees for the measurement of various physicaland mechanicalpropertiesof the wood.【ResultAfter2O years of pruning ina17-year-old mid-rotation stand，the form factorof Chinese fir wood was significantly increased.Pruning had no significant efectonstem taper， height-to-diameterratio，oven-drydensity，air-drydensity，volumetricshrinkagecoeficient，shrinkagerate，orsweling rate.However，pruning significantlyreduced tangential hardness，radial hardness，compressive strength，and tensile strength.Specifically，the tangential and radial hardness of pruned wood were 14.52% and 16.43% lower，respectively， than those of non-pruned wood. The order of hardness across grain directions was：endwise > tangential > radial. No significant differences wereobserved inendwise hardnessor modulus of elasticitybetweenprunedandnon-pruned wood. 【Conclusion】After 2O years，pruning significantlyinfluenced the form factor andcertain mechanicalpropertiesof Chinese firwoodbutdidnotsignificantlyafectstemtaperorheight-to-diameterratio.Whiletangentialandradial hardness，compressive strength，and tensilestrength were significantlyreduced，endwise hardnessand modulusof elasticityremainedunaffected.Both prunedandnon-prunedChinese firwood exhibitedphysicaland mechanical propertieswithin the“verylow to low”range.Thecomprehensivestrength qualitycoeficientof pruned wood was slightly lower than thatof non-pruned wood;however，pruningdidnotalter itsoverall clasification.Both typesof wood were classified aslow-strength timber.

Keywords：Cunninghamia lanceolata；pruning；knot-free column wood；wood property

杉木（Cunninghamialanceolata）是我国人工林面积最大的南方林区主要造林树种，其生长快、产量高、材质好[1]。（剩余14402字）