密度和树冠结构对杉木人工林立木材积的影响

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中图分类号：S758.62 文献标志码：A 文章编号：1673-923X（2025）10-0028-11

Effect of standing density and crown structure on standing volume of Cunninghamia lanceolata plantation

ZHANG Xiang，DOU Xiaowen， ZHU Guangyu

（SchoolofForestryCentralSouthUniversityofForestry&Technology，Changsha4oo4，HunanCina）

Abstract：【Obective】CungamialncolatianimportantplntatiotrspciesinubtropicalChinaandtedeclineofad productivitycausedbyitsintensivemanagementmodeneedstobesolvedurgently.Theobjectivesofthisstudyweretoexplorethe effectofCuninghmialancelatacrownstructureonstandingtreevolumeudedifrentstanddensities，soastoprovideaetical basisforncreasingtheyieldofCunghamialancelataplantationforests.【Method】23Cunnghamialancelataplantationsisix provincesadtooinogingidjetettl Spearman’scorelationanalysisasused toexploretherelationshipbtwenronstructuralparameters，standngdnsityadstanding treevolume.The density was divided into threegrades （ 0-1200trees/hm2 ，1201-2 400 trees/hm²，2 401-3 600 trees/hm2），and then therelationshipbetwencrowncharacteristicparametersandstandingtreevolumeunderdiferentdensitieswasstudiedbydifrence analysis.Fiallysubgroupanalysis asused toanalyetheinteractionbetweendensityandcrownstructuralparametersonstanding treevolume.【Result】Theresultsshowedthat hecrownvolume，crownwidth，crownlength，crownshaperatioandstandingvolume showedaverysignificantpositivecorrelation （P<0.01 ），withthe correlationsranging from strongest to weakest：crown volume > crown length > crown width > crown shape radio > crown radio; while the density showed a very significant negative correlation with thecrownstructureandstandingtreevoume;Atdiferentdensitylevels，threweresignifcantdiferenesinstandingvoluerown volume，crown width，crown length and crown shape radio （P<0.01 ）; The interaction between density and crown volume，crown length，crown ratio，hasa significant positive impact onstanding tree volume （P<0.05 ）.【Conclusion】Stand density hasa significant negativeimpactonthestanding volumeandcrownstructure，andtheaccumulationofstandingvolumeisafectedbytheinteraction betweedensityandcrownstructure，whichprovidesscientificguidancefortheadjustmentofcrownstructureofCunninghamia lanceolataplantationsunderdifferentdensities.

Keywords：Cunninghamia lanceolata;crown structure;stand density;standing tree volume

杉木是中国造林面积最大的亚热带乡土用材树种，是重要值排名第一的乔木树种，在林业生产和生态建设中占据重要地位[]。（剩余20259字）