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This study focused on a 5-year-old artificial Pinus yunnanensis forest in Yanyuan County. Five gradients of humic acid fertilizers were set up. By measuring the growth indicators of the trees, biomass accumulation, and nutrient content, the regulatory effect of humic acid on the growth and development of Pinus yunnanensis was systematically analyzed. The results showed that an appropriate amount of humic acid significantly promoted the growth of Pinus yunnanensis. Among them, the 25 kg/667 m² treatment had the best effect, with a growth rate of 1.82 cm in diameter, an increase of 49.2% compared to the control group; a growth rate of 0.86 m in tree height, an increase of 53.6%; a growth rate of 42.35% in volume, an increase of 50.5%; and the biomass and nutrient content and reserves of roots, stems, and leaves, as well as nitrogen, phosphorus, and potassium nutrients, all significantly increased under this treatment, with the total biomass increasing by 51.6% compared to the control group.

, authors=Huairu Yang, authorsList=Huairu 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=1294746862498640874, articleId=1294746862049850344, tenantId=1146029695717560320, journalId=1293586367437176863, language=CN, title=不同腐殖酸质量对云南松生长的影响, columnId=1294746790927033036, journalTitle=农业技术与装备, columnName=林果科技, runingTitle=null, highlight=null, articleAbstract=

以盐源县5 a生云南松人工林为研究对象，设置5个腐殖酸肥料梯度处理，通过测定林木生长指标、生物量积累及养分含量，系统分析腐殖酸对云南松生长发育的调控效应。结果显示，适量腐殖酸显著促进云南松生长。其中：25 kg/667 m²处理效果最佳，胸径增长量达1.82 cm，较对照提升49.2%；树高增长量0.86 m，较对照提升53.6%；材积增长率42.35%，较对照提升50.5%；该处理下根、茎、叶生物量及氮、磷、钾养分含量与储量均显著增加，总生物量较对照增长51.6%。

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杨怀茹（1999-），女，藏族，四川盐源人，助理工程师，研究方向为林业。

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杨怀茹（1999-），女，藏族，四川盐源人，助理工程师，研究方向为林业。

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