Cu、Zn制剂对紫花风铃木苗期生长 和根系形态的影响

打开文本图片集

中图分类号：S723 文献标志码：A 文章编号：1673-923X（2026）03-0097-09

Effects of cupreous and zincous preparations treatment on seedling growth and root morphology of Handroanthus impetiginosus

JIAPeng，DAI Seping，LUO Shukai

（a.GuangzhouColaborativeInnovationCenteronScience-TechofEcologyandLandscape;b.GuangzhouUrbanEcosystemNational Field Station，Guangzhou Institute ofForestryandLandscape Architecture，Guangzhou5104o5，Guangdong，China）

Abstract：Ojectie】Toivesigateteootcotrollngfectsofierentemicalentsndproidetoreticalec forHandroanthus impetiginosuscontainer seedlingscultivation.【Method】Acontroled-root experiment wasconductedon H.impetiginosuscontaierseedlingsunderatwo-factorradomizedblockdesignTreatmentswithdiferentconcentrationsofupeous andzincouspreparationswereappliedtoevaluatetheirffectsonsedlinggrowthcharacteristicsandootmorphologyduringtheearly growth stage.【Result】Cu and Zn agents had limited influence on seedling height and ground diameter，but significantly improved the quality index of seedlings of H. impetiginosus.Cu agentsand high concentration Zn agents significantly increased the aboveground biomass，belogodsdtotalss.getsigantlcdotsedotas Zn agents exhibited promotive effect exclusively on fine root biomass.Cu agents and Zn agents had significantly promotion effects on root morphological parameters，including totalrootlength，rootsurfacearea，rootvolume，androottipnumber.Additionally， cu and Zn （2号 agentssignificantlyalteredrootstructurebyreducingtherootaveragediameterandmarkedlyenhancingthe growthandproportionof fine roots，particularly extremely fine roots （0.0.5mm ）.These changes promoted the development of the root system toward a“fine-rootdominated”structural pattern.The root-control effects ofCu agents was slightly higher than that of Zn agents，and the promotion effects of Cuagents on extremely fine roots （0.0.5mm ）wassignificantly better than that of Zn agents，while there was little difference between theroot-contolctsoftticalentsinespect.oclusion】H.impetiosusmonstratesprooedleae to copper （Cu） and zinc （Zn） ，supporting the implementation of chemical root control techniques for container seedling cultivation.

Based oncomprehensive analysis of the growth and root morphology， 120g/L Cuagent is recommended asthe optimal chemical root control reagent for the seedling cultivationof H.impetiginosus. Keywords： chemical root control; Handroanthus impetiginosus; seedling cultivation;root morphology

高质量容器苗的关键特征是具备发达且结构合理的根系系统[1-2]。（剩余14521字）