立地对马占相思人工林生长和材性的影响

《立地对马占相思人工林生长和材性的影响》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、立地对马占棚恩人丁林生K捌材性的影响ageofA，mangiumplantationjsabout14yearsgrowingOilshadyslope，anditisabout10yearsgrowingonsunnyslope．‘I'hequantiiivematurityageofA．tnangiuolplantationisabout13．5yearsgrowingincostalsand，anditisabout16yearswhichgrowingOUmouniailioUSredsoil．Theeltectofslop

2、edirectionandsoiltypeOilthephysicalandmechanicalpropertiesofthewoodof13一year-oldA．mangiumplantationwasstudiedinthisresearch．1Thcresultsshowedthatslopedirectionhassignifia,mtefl＆tsonratiooftangentialshrinkagetoradialshrinkage，bendingstrength，elasticmodulusofbending，tang

3、entialstrengthtocleavage，compressionstrengthparalleltograin，andhasonsignificanteffectvnwoodairdrydensity,basicdensity，coefficientofshrinkage，shearstrengthparalleltograin，hatdileSS，radialstreugthtocleavageandimpactbendingtoughness．SoiltypehassigniticanterectsOffwooddens

4、ity,coeflicieutsofradialshrinkage,ratiooftangentialshriahgetoradialshrinkag．allmechanicsindices．儿J-asnosignificanteffectsoncoefficientsoftangentialshrildgageandcoefficientsofvolmneshrinkage．Wooddensity,ratiooftangentialshrinkagetoradialshrinkagandallmechanicsindicescom

5、efromsunnyslopearelargerthanthatcomefromshadyslope．Andthewooddensity,ratioortangentialshrinkagetoradialshriakagandallmechanicsindicesconleliolncoastalsandair；largerthanthaicolliefloramountainousredsoil．TheeffectorslopedirectionandsoiltypeontheWOOdIlbe[morphologyj．swell

6、aschemicalcompositionofthewoodof13一year-oldA．uumgiumplantationw∞studiediatiltsresearch．Theresultsshowedthattheslopedirectionhassignificanteffectsontiberwidthandratioofwalltolumen，andhasnosignificanteffectsonfiberlength，ratiootlengthtowidth，lumendianieteroffiberanddoubl

7、ewallthickness．ThesuiltypehasMgniticanterectsOilfiberwidthandratioofwalltolumen．andhasnosignificant‘饪cc峙Oiloilierindicesoffibermorphology．ContentsofcelluloseandextractiveofA．mangiumwoodli'oniplautationglowingonsunnyslopearebiggerthanthatgrowingonshadyslope，whiletheasha

8、ndiigninconicalsmaller．TheContentofcelluloseofA．mangiumWOOf]fl：omplantationgrowingonmouutainoubredsoilisbiggerthantha