简介：Inthisstudy,thesampledatawasbasedon2790samplesof9treesfromdahurianlarch（Larixgmelinii）plantationslocatedinQitaiheForestBureauinHeilongjiangProvince.ThemodifiedLogisticmodely=b1/[1+exp（b2x）]+b3wasselectedtomodelingmicrofibrilanglefromsixmodelsbasedonnonlinearregression.Then,thelogisticmodelwasfittedusingnonlinearmixed-effectmodelingapproachbasedonNLMEofS-PLUSsoftware.Evaluationstatistics,suchasAIC,BIC,LogLikelihoodandLikelihoodratiotestwereusedformodelcomparisons.TheresultsshowedthattheLogisticmodelwithparametersb1,b2,b3asmixedeffectsshowedthebestperformance.Correlationstructuresincludedcompound-symmetrystructure（CS）,first-orderautoregressivecorrelationstructureAR（1）,movingaveragecorrelationstructureMA（1）andautoregressive-movingaveragecorrelationstructure[ARMA（1,1）]wereincorpratedintothebestmicrofibrilanglemixedmodel.[ARMA（1,1）]significantlyimprovedtheprecisionofmixedmodel.Validationconfirmedthatthemixedmodelwithcalibrationofrandomparameterscouldprovidemoreaccurateandpreciseprediction.Therefore,theapplicationofmixedmodelnotonlyshowedthemeantrendsofmicrofibrilangle,butalsoshowedtheindividualdifferencebasedonvariance-covariancestructureandcorrelationstructure.

简介：Thispaperstudiesthecharacteristicsoflarchbarkpyrolysisandanalyzesfactorsthataffectthepyrolysisandtheliquidpyrolyticcomponent.Theresultsareasfollows:TGcurveshowsthatthepyrolysiscanbedividedintothreeparts:dryingprocess,pyrolyticprocess,andcarbonateandcalcinatedprocess.BoththesizeofgrainandthetemperaturerisingrateaffecttheshapeofTGandDTG.Vinegarandsedimentarytararemaincomponentsofpyrolyzateproducts.GC-MSisappliedtoanalyzevinegar.Itisshownthatthevinegarisahighlycomplexcompoundwhichiscomposedofphenolanditsderivatives(45.620%),organicacid(13.851%),ketoderivatives(9.754%),aldehydicderivatives(8.573%),alcoholicderivatives(1.794%),esteranditsderivatives(0.205%).

简介：Bythemethodofcomparisonandanalysis,thesuccessionpatternoftotalP,availablephosphorus,organicPtypesandinorganicPtypesinrhizosphereandnon-rhizospheresoilatdifferentdevelopmentstagesinLarch(Larixolgensis)plantationswasrevealed.Theresultshowed:whenstandageincreased,thecontentofavailablephosphorus,O-P,totalPandorganicPinrhizospheresoildecreasedgreatlyorsignificantly,thecontentofinorganicP,Ca-PandFe-Pinrhizospheresoilinrhizospheresoilincreasedgreatlyorsignificantly.ThecontentofCa-Pinnon-rhizospheresoilincreasedwithstandgrowing.ThecontentofFe-Pinhalf-maturestand,availablePandFe-Pinnearmaturestand,availablePandCa-Pinmaturestandinnonrhizospheresoilwasmorethanthatinrhizospheresoil.

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简介：Inthisstudy,thesampledatawasbasedon2190branchlengthandanglesamplesof30treesfromdahurianlarch（Larixgmeiinii）plantationslocatedinWuyingForestBureauinHeilongjiangProvince.Thestepwiseregressiontechniqueswereusedtodevelopbranchlengthandbranchanglemodels:BL=b1+b2DINC+b3DINC2+b4DBH·DINC2,BA=b1+b2DINC+b3DINC2+b4DBH·DINC.Then,thedevelopedmodelswerefittedusinglinearmixed-effectsmodelingapproachbasedonLMEprocedureofS-PLUSsoftware.Evaluationstatistics,suchasAIC,BIC,LogLikelihoodandLikelihoodratiotestwereusedformodelcomparisons.Theresultsshowedthatthebranchlengthandbranchanglemodelswithparametersb1,b2,b3asmixedeffectsshowedthebestperformance.Exponentialandpowerfunctionswereincorporatedintomixedbranchlengthandbranchanglemodel.Theadditionoftheexponentialandpowerfunctionssignificantlyimprovedthemixed-effectsmodel.Theplotsofstandardizedresidualsindicatedthatthemixed-effectmodelwithexponentialandpowerfunctionsshowedmorehomogeneousresidualvariancethanthemixed-effectsmodel.Validationconfirmedthatthemixedmodelwithcalibrationofrandomparameterscouldprovidemoreaccurateandpreciseprediction.Therefore,theapplicationofmixedmodelnotonlyshowedthemeantrendsofbranchlengthandbranchangle,butalsoshowedtheindividualdifferencebasedonvariance-covariancestructure.

简介：Forthehealthymanagementofplantation,ahealthassessmentindicatorsystemwasdesignedatforeststandscaleforthelarchplantationinJin'oulingForestFarm,WangqingForestryBureau,JilinProvince.Thesystemconsistedof3categories—foreststructure,externalinterferencesandmanagementobjectives,with15indicators.Theresultsshowedthat:1)theassessmentindicatorsystemwasscientificandrationalfordifferentagegroupsoflarchplantations;2)boththehalf-maturelarchplantationand...

简介：华盖拦截是事件降雨的一个重要比例和森林生态系统的土壤水分蒸发蒸腾损失总量。因此，识别它的大小为eco水文学过程和水文学影响评估的研究是重要的。在这，学习，throughfall，stemflow和拦截在纯Larixprincipis-rupprechtiiMayr被测量。(落叶松)在西北的中国的Liupan山的种植园在2015的成长季节(5月10月)期间，并且使用一个修订深长的切痕模型模仿。在学习时期期间，全部的降水是499.0?公里；相应全部的throughfall，stemflow和华盖拦截是410.3，2.0和86.7?公里，为82.2全部的降水，0.4和17.4%的财务分别地。与增加降雨，单个降雨事件的华盖拦截比率开始减少了然后趋于稳定。在学习时期，模仿的全部的华盖拦截，throughfall和stemflow以内是2.2?公里降低，2.5?更高的公里并且0.3?比他们的测量价值低的公里与2.5，0.6和15.0%的一个相对错误，分别地。是由模型，确定了华盖拦截损失(79%)主要由华盖吸附引起的拦截组成了，当另外的拦截的比例和箱子拦截是小的时。修订深长的切痕模型对华盖存储能力的参数高度敏感，由密度和吝啬的降雨紧张，而是对吝啬的蒸发的参数敏感的更少评估的华盖的参数列在后面，箱子存储能力，和stemflow比率。修订深长的切痕模型令人满意地在成长季节以内模仿了落叶松种植园的全部的华盖拦截，但是为一些单个降雨事件是不太精确的，显示一些缺陷在模型结构存在。在模仿单个降雨事件的拦截改进模型能力的进一步的措施被建议。

简介：Defenceproteinsareakindofchemicaldefencecompounds.Theyplayakeyroleinplantrestrainingbioticandabioticharm.Toilluminateactivitiesofsomedefenseproteinsassociatedwithageorplantfamilyoflarch,thelarchneedleswerecollectedfromtwodifferentfamiliesofKoreanlarch,Larixolgensisandahybridlarch,L.kaempferi×L.gmelinii,respectively,andthentheactivitiesofdefenceproteinsinthoseweretestedusingaUVspectrophotometry.Theresultsshowedthattheactivitiesofprotectiveenzymesatthe16-/17-and19-year-agegroupswerehigherthanthoseattheotheragegroupsinthebothlarchspecies.Whiletheactivitiesofpolyphenoloxidase(PPO)atthe16-/17-year-agegroupandphenylalanineammonia-lyase(PAL)andproteaseinhibitorsatthe19-year-agegroupwerethehighestamongallagegroups.Then,comparedwithL.olgensis,thehybridlarchhadsignificanteffectsontheactivitiesofprotectiveenzymes.TheeffectsofplantfamilyontheactivitiesofPALandchymotrypsininhibitorweresignificantlydifferent,andthenthoseontheactivitiesofPPOwerenotsignificantlydifferent.TheeffectsofthetwofamiliesinL.olgensisontheactivitiesoftrypsininhibitor(TI)weresignificantlydifferent,whilethoseinthehybridlarchontheactivitiesofTIwerecontrary.Toconclusionsshowedthatthedifferentageandplantfamilysignificantlyaffectedtheactivitiesofdefenceproteinsintheneedlesoftwolarchspecies,andthenenhancedthelarchresistancetopests.Thesecouldplayakeyfunctioninforestrytreegeneticimprovementandmanagementinfuture.

简介：亚洲落叶松的行为的回答吠叫甲壳虫，IpssubelongatusMotsch。到三个潜在的聚集pheromone部件，ipsenol(外消旋或[?]-enantiomer),ipsdienol(外消旋或[+]-enantiomer)和3-methyl-3-buten-1-ol，在东北中国的二个省(内部蒙古和吉林)用部分或完整的因素的试验性的图案被测试。我们在内部蒙古的地生物鉴定(Larixprincipis-rupprechtiiMayr。种植园)清楚地证明ipsenol，外消旋的任何一个或97%-(?)-enantiomer,是显著地吸引了两性的唯一的化合物我。subelongatus，当所有其它加重时(单身地或在联合)是不美的。没有双向或三路的synergistic相互作用。然而，在吉林省(L。gmelini[Rupr]Rupr。种植园)，测试的所有单个混合物是不活跃的，除了由在2004的97%-(?)-ipsenol的一项很弱的活动当甲壳虫人口很高时。当ipsenol和ipsdienol(racemates或enantiomerically纯的自然enantiomers)的联合为两性显示出一个重要吸引力时我。subelongatus，显示在这二个主要部件之间的一个双向synergistic相互作用，任何东西在陷井上完成的活跃二进制混合没有的到这些的3-methyl-3-buten-1-ol的增加抓住，建议ipsenol和ipsdienol是synergistic聚集pheromone部件我。在吉林省的subelongatus。看起来在内部蒙古或在吉林省的97%-(?)-ipsenol和97%-(+)-ipsdienol的二进制混合的97%-(?)-ipsenol比他们的相应racemates优异，它可能对相对极enantiomers的弱禁止的效果或到在racemate的活跃自然enantiomer的减少的版本率到期。我们的当前的生物鉴定结果建议在聚集pheromone反应有一个强壮的地理变化我。在东北中国的subelongatus。关于pheromone生产和反应的未来研究我。从在东北亚洲的不同区域的subelongatus将肯定改进我们这只经济地重要的森林害虫昆虫的动态聚集pheromone系统的理解。