资源描述：
《尾叶桉人工林枯落物及土壤持水性能的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、第33卷第3期中南林业科技大学学报Vol.33No.32013年3月JournalofCentralSouthUniversityofForestry&TechnologyMar.2013尾叶桉人工林枯落物及土壤持水性能的研究1,212赵知渊，舒清态，杜阿朋（1.西南林业大学林学院，云南昆明650224；2.国家林业局桉树研究开发中心，广东湛江524022）摘要：通过对10年生尾叶桉Eucalyptusurophyla人工林林下枯落物的持水量、持水速率和土壤物理性质的取-2样分析，研究了林下枯落物和土壤的
2、持水性能。结果表明：该林分的枯落物储量为14.15t·hm，最大持水量为3.07mm，有效拦蓄水量为1.90mm，半分解层的最大持水率、最大持水量、有效拦蓄率和有效拦蓄水量均大于未分解层；整个持水过程中，半分解层的持水量和持水速率一直大于未分解层；随着林下土壤深度的增加，土壤容重逐渐增大，孔隙度减小，持水量也随之减小，其土壤持水能力与土壤容重和土壤层深度基本呈反比；由于人工林内抚育经营活动较频繁，使枯落物分解迅速，而同时生物圈的活动对土壤的物理性质也产生着重要影响。关键词：尾叶桉人工林；枯落物；土壤；持水
3、性中图分类号：S792.39文献标志码：A文章编号：1673-923X(2013)03-0098-05StudyonwaterholdingcapacityoflitterandsoilinEucalyptusurophyllaplantations1,212ZHAOZhi-yuan,SHUQing-tai,DUA-peng(1.CollegeofResources,SouthwestForestryUniversity,Kunming650224,Yunnan,China;2.ChinaEucalypt
4、ResearchCentre,Zhanjiang524022,Guangdong,China)Abstract:Throughsamplinganddeterminationofthelitter’swaterholdingrate,waterholdingquantityandthephysicalpropertiesofthesoil,thewaterholdingcapacityof10-year-oldEucalyptusurophyllaplantation’slitterandsoilwass
5、tudied.Theresultsshowthat-2thestands’litterreservewasabout14.15t•hm,maximumwaterholdingquantitywas3.07mm,effectiveimpoundmentofwaterwas1.90mm,andsemi-decomposedlayer’smaximumwaterholdingrate,maximumwaterholdingquantity,effectiveimpoundmentrateandeffective
6、impoundmentquantityofwaterweregreaterthanun-decomposedlayer’s;thesemi-decomposedlayer’swaterholdingquantityandwater-holdingratehasbeenbeinggreaterthantheun-decomposedlayer’sduringthewholeprocessofwaterholding;gradually,thestands’soilbulkdensityincreased,t
7、hesoil’sporosityreduced,thesoil’swaterholdingcapacityalsodecreasedasthedepthincreased,soil’swaterholdingcapacitywasinverselyproportionalwithsoilbulkdensityandsoillayer’sdepthbasically;thetendingoperationsoftheplantationwasfrequent,soitslitterdecomposedrap
8、idly,whilethebiosphereactivitiesalsohadanimportantimpactonsoil’sphysicalproperties.Keywords:Eucalyptusurophylaplantations;litterfall;soil;waterholdingcapacity[6][7-11]桉树Eucalyptus是我国华南地区最主要的纸也出现了土壤侵蚀加重、河川径流减少等许浆用材林树
