文档介绍：广东省桉树林的土壤肥力研究李爱英()广东省林业调查规划院广州510520摘要利用2002年广东省森林资源与生态状况综合监测评估体系的95个桉树林样地的调查资料研究了桉树林的土壤肥力。按《我国土壤质地暂行分类方案》将95个样地土壤合并为粉壤土、粘壤土、粗砂土、细砂土、面砂土、粉粘土、砂粘土、粘土、壤粘土。通过对土壤理化性质进行聚类分析,将土壤按质地类型划分为4类:第1类包括粉壤土、粉粘土和壤粘土,速效K含量较高,速效P含量中等,其余养分含量位居9种土壤的前列,容重和毛管孔隙中等,肥力较高;第2类是粘壤土,全K含量最高,速效N含量中等,其余养分含量较低,容重较小,毛管孔隙较大而非毛管孔隙中等,总体上肥力水平中等;第3类包括粗砂土、细砂土、面砂土和砂粘土,此类土大多数有机质、全N、全K、速效N、速效K含量低,而有的速效P含量较高,容重大、毛管孔隙小,总体来说肥力低;第4类为肥力高的粘土,其有机质、全N、全P、速效N、速效P含量均是9种土壤中最高的。关键词广东桉树人工林土壤肥力()中图分类号::A文章编号:1006-4427200803-0051-06StudyonSoilFertilityofEucalyptPlantationsinGuangdongProvinceLiAiying()ForestryInventory&PlanningInstituteofGuangdongProvince,Guangzhou,,binedintothesoilsdevelopedfromgranite,limestone,purplesandstone,,theyweredividedintosiltyloam,glueingloam,course2sandsoil,fine2sandsoil,facesandysoil,siltyclay,sandyclay,ordingto“Classifi2cationofSoilTextureinChina”.Usingclusteranalysis,soilfertilitiesweredividedintofourtypes:thefirstgroupincludedsiltyloam,siltyclayandloamclay,whichhadrelativehighavailableK,medianavailableP,andothernutrientsrankedforefront,soildensityandcapillaryporosityweremedian,sothattheirfertilitywashigh;thesec2ondgroupincludedglueingloam,whichhadthehighestavailableK,medianalkalizedN,whereasothernutrientswererelativelow,soildensitywassmall,capillaryporositywasgreatandnon2capillaryporositywasmedian,sothattheirfertilitywasmedian;thethirdgroupincludedcourse2sandsoil,fine2sandsoil,facesandysoilandsandyclay,anicmatter,totalN,totalK,alkalizedNandavailableK,andavailablePcontentsofsomeplotswerehigh,soildensitywasgreatwithsmallcapillaryporosity,resultingtheirlowsoilfertili2ty;thefourthgroupincludedclaywithhighfertility,anicmatter,totalN,totalP,,eucalyptplantation,soilfertility3广东省林业调查规划院为本研究提供了基础数据,特此致谢!桉树原产于澳大利亚、印度尼西亚和菲律宾,生长迅速,适应性广,是世界三大造林树种之一。我国引种桉树虽有110多年的历史,但在1949年以前,只有小规模的引种试验及小面积的栽培作为行道树、庭园观赏、四旁绿化的树种。