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To investigate the effects of different pruning intensities on the growth and volume formation of Pinus tabuliformis plantations, five pruning intensity treatments were set up in Anlexi Township of Hezhang County in Guizhou Province. Tree height, stem diameter, canopy width, branch height below the ground, single tree volume, and stand volume were measured and analyzed. It was suggested to adopt a pruning intensity of 25% to 35% to optimize the growth and volume of Pinus tabuliformis, avoiding excessive pruning that leads to a decline in productivity, and providing technical references for the sustainable management of Pinus tabulifor-??mis forests in Karst mountain area.

, authors=Haijiao Yang, authorsList=Haijiao Yang, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1294746795872117490, articleId=1294746795297497840, tenantId=1146029695717560320, journalId=1293586367437176863, language=CN, title=不同修剪强度对油松生长与材积形成的影响, columnId=1294746790927033036, journalTitle=农业技术与装备, columnName=林果科技, runingTitle=null, highlight=null, articleAbstract=

为探究不同修剪强度对油松人工林生长与材积形成的影响，本研究于贵州省赫章县安乐溪乡设置5个修剪强度处理（0%、15%、25%、35%、45%），测定并分析了树高、胸径、冠幅、枝下高、单株材积及林分蓄积等指标。结果表明，适度修剪（25%~35%）显著促进油松生长，35%修剪强度下单株材积达0.041 2 m³/株，较对照提高30.79%，树高、胸径、冠幅增幅分别达14.16%、23.09%、17.38%；修剪强度超过35%后，生长指标回落，林分蓄积量下降，45%修剪强度下较对照降低19.18%。因此，建议采用25%~35%修剪强度以优化油松生长与材积。研究结果可为喀斯特山区油松林可持续经营提供技术参考。

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杨海娇（1993-），女，回族，贵州威宁人，助理工程师，研究方向为林业。

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杨海娇（1993-），女，回族，贵州威宁人，助理工程师，研究方向为林业。

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