TROPICALFORESTRYVOL.51NO.2Jun.2023海南省枫木实验林场树木园树木根系分布特征田乐宇，韦建杏海南省林业科学研究院（海南省红树林研究院），海南海口571100摘要：为更加科学地管理海南省枫木实验林场树木园，以海南省枫木实验林场的树木园树木根系为研究对象，采用样方挖掘法，调查不同土层深度的树木园土壤根系生物量密度，通过方差分析和拟合方程分析等方法，探究树木园树木根系分布特征。结果显示：在树木园0~≤100cm深的土层内，直径0~≤10mm根系的生物量密度为250.34g/m，且细根是树木园根系的主要组成部分（占比46.16%）。树木根系主要分布在0～<30cm深的土层中（占比73.50%），且随土层加深，各径级根系的生物量密度均显著降低。树木园树木根系生物量密度最适回归方程为：ln（y）=7.14－0.04×d。结果表明：0～<30cm深的土壤表层应是树木园水肥管理和管护的重点区域。关键词：树木园；根系分布；生物量中图分类号：S718.4-339RootDistributionCharacteristicsofTreesintheArboretumofHainanHainanAcademyofForestry(HainanAcademyofMangrove),HaikouHainan571100Abstract:InordertomanageandprotectthearboretumofHainanFengMuExperimentalForestFarmmorescientifically,thearboretumofHainanFengMuExperimentalForestFarmwastakenastheresearchobject,andthesoilrootbiomassdensityofarboretumatdifferentsoildepthswasinvestigatedbyquadratexcavationmethod.Useingvarianceanalysisandfittingequationanalysistoexploretherootdistributioncharacteristicsofarboretum.Theresultsshowedthatthebiomassdensityofrootswithadiameterof0~≤10mmwas250.34g/m3intheO0~≤100cmdeepsoillayerofthearboretum,andfinerootswerethemaincomponentofthearboretumroots(accountingfor46.16%).Rootsweremainlydistributedin0~<30cmdeepsoillayer(accountingfor73.50%).Withthedeepeningofsoillayer,thebiomassdensityofrootsofeachdiameterclassdecreasedsig-nificantly.Theoptimumregressionequationofrootbiomassdensitywasln(y)=7.14-0.04×d.TheresultsshowedthattheO~<30cmdeepsoilsurfacelayershouldbethekeyareaforwaterandfertilizermanagementandmanagementofarboretum.Keywords:Arboretum,Rootdistribution,Biomass根系是树木的营养器官，负责从土壤中吸收水分和养分供树木生长发育所需，主要由较细根系和基金项目：海南省科研究院所技术创...
