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1、第29卷第2期桉樹科技測(cè)土儀：http://www.tryfyq.com/Vol.29No.22012年6月EUCALYPTSCIENCE&TECHNOLOGYJun.2012不同造林措施對(duì)桉樹人工林地土壤養(yǎng)分的影響杜阿朋,韋東艷,張婧,謝耀堅(jiān)(國(guó)家林業(yè)局桉樹研究開發(fā)中心,廣東湛江524022)摘要:針對(duì)桉樹人工林地力退化問(wèn)題,通過(guò)比較兩種造林措施下桉樹人工林地土壤肥力特征發(fā)現(xiàn),皆伐和造林時(shí)的人為活動(dòng)對(duì)淺土層(0~20cm)的土壤有松動(dòng)作用,在一定程度上降低土壤容重,部分提高土壤持水量和孔隙度,但造林后林地土壤物理特性變差,煉山+機(jī)械挖樁造林措施對(duì)林地土壤物理性質(zhì)破壞作用要明顯
2、高于伐根催腐造林;與皆伐前相比,兩種造林措施均導(dǎo)致了林地土壤pH向酸性化方向發(fā)展;伐根催腐造林使得林地土壤有機(jī)質(zhì)含量、全N、全K、Ca和Mg含量均較皆伐前大,煉山措施導(dǎo)致大量養(yǎng)分燒失和流失,故其最小;土壤微量元素中除了Cu以煉山造林地最大外,Fe、Mn、Zn、B均以伐根催腐造林地最大。關(guān)鍵詞:桉樹人工林;造林措施;土壤肥力中圖分類號(hào):S725文獻(xiàn)標(biāo)識(shí)碼:AEffectofDifferentMethodsofForestationonEucalyptPlantationSoilFertilityDUA-peng,WEIDong-yan,ZHANGJing,XIEYao-jian(
3、ChinaEucalyptResearchCentre,Zhanjiang524022,Guangdong,China)Abstract:Inordertounderstandsoilfertilitychangesundereucalyptplantations,thesoilfertilityineucalyptplantationsundertwomethodsofsitepreparationwerecompared.Theresultsshowedthatthesuperficiallayerofsoil(0~20cm)becamelooser,becauseofhu
4、manactivitiesofclearcutting,sitepreparationandre-plan-ting.Suchactivitiesreducedsoilbulkdensity,whichimprovedsoilwaterholdingcapacityandporosity,butthesoilphysicalcharacteristicsdeterioratedafterre-planting.Physicalpropertiesofforestsoilsweredetrimen-tallyaffectedbycontrolledburningcombinedw
5、ithsoilrippingandploughingwithstumpremovalcomparedtositepreparationmethodsthatleavestumpsinplacetorot.Comparedwithsoilnutrientlevelsinplantationsbe-foreharvesting,bothmeasuresincreasedforestplantationsoilacidity(pHdeclined).Leavingstumpsinplacetorotresultsinhighersoilorganicmattercontentandh
6、ighertotalN,totalK,CaandMgcontentsthanbeforeclear-cuttingoftheplantation.Burningafterfellingofplantationsresultedinsignificantlossofmanynutr-ients,butincreasedsoilcontentofthetraceelementnutrientsFe,Mn,ZnandBelement.Keywords:eucalyptplantation;methodofforestation;soilfertility桉樹(Eucalyptus)是
7、世界公認(rèn)的三大速生人工林化、林地肥力下降等現(xiàn)象,桉樹人工林對(duì)林地土壤樹種之一,自19世紀(jì)末引入我國(guó)。隨著其種植面的影響已成為爭(zhēng)論和關(guān)注的焦點(diǎn)問(wèn)題之一,這一問(wèn)積的迅速擴(kuò)大,桉樹人工林經(jīng)營(yíng)中出現(xiàn)了土壤退題如得不到徹底的解決,必將影響桉樹產(chǎn)業(yè)的發(fā)展收稿日期:2012-04-12基金項(xiàng)目:林業(yè)公益性行業(yè)科研專項(xiàng)/桉樹生態(tài)經(jīng)營(yíng)及產(chǎn)業(yè)升級(jí)關(guān)鍵技術(shù)研究0(201104003)作者介紹:杜阿朋(1979)),男,博士,助理研究員,主要從事森林生態(tài)等研究.E-mail:dapzj@163.com通訊作者:謝耀
