简介：Bydrawingonstudiesofdomesticandinternationalforestlandscapeassessmentandvisualevaluationofurbansoundscape,wesummarizedthemainfactorsaffectingtheforestsoundscape.Onthisbasis,weestablishedanevaluationsystemforlevel2class3forestsoundscape.Elevenindicatorsoftheforestsoundlandscapeaestheticevaluationsystemandtheweightoftheproductwerescored,andthentheaccumulatedscoredvaluesweredefinedasthesoundlandscapeaestheticindex.Theacousticlandscapeindexwasusedtomeasurethesizeoftheforestlandscapebeautifuldegree.

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简介：Thisarticlegraspstheimplicationofecologybasedonthetheoryofgreenway,WiththepurposeofmakingZhejiangProvincebecomeanecologicalprovince,itpointsoutthattheproblemsexistinthegreenwayconstructionandmakesitclearthatthegreenwayconstructionisveryimportant.Furthermore,incombinationwiththelineargreenopenspaces,suchasgreeningpassages,touristareas,andadministrationfacilitiesinZhejiangProvince,thisarticleputsforwardthestrategicideasofthegreenwaysconstructionandthestrategies,measurestoapplythegreenwaysconstruction.

简介：EstablishedbytheformerMinistryofForestryin1986,DagangshanForestEcosystemResearchStationisoneofthe14nationalkeysitesinthefieldofecosystemresearch.Inthispaper,thebasicsituationofDagangshanForestEcosystemStationisdescribed,includinggeographiclocation,naturalconditions,biologicalresources,researchconditions,instruments,achievement,prospectsetc.

简介：Forestgeneticmapsareanimportantcomponentwithintheforestbiologist’stoolkit,underpinningforestimprovementprograms.Theestimationofforestgeneticmapsisaconceptuallysimpleyetcomputationallycomplexproblem,duetolonggrowthperiodandhighheterozygosisandgeneticloadofforesttrees.Atpresent,somegeneticmapsoftreeshavebeenconstructed.Thispaperreviewedtheprocessofforestgeneticmapconstruction,highlightingitsuniqueness,andpointedouttheproblemsthatmightriseinmapping.Finally,prospectwasmadeforconstructingthehighdensitygeneticmapoftrees.

简介：Urbanforestisanimportantcompositionandthewindowandsoulofmoderncities,whichhasacloserelationshipwithecologicalenvironmentandinvestingenvironment.SourbanforesthasbeenconstructedinChina.HuainingCountycouldholdofthehistoricalopportunityandcomeupwiththegreatblueprintofforestecologicalnetworksystemconstructionforthenewtown.Thispapermainlyintroducestheguidingideas,principles,goalsandoveralllayoutsoftheconstructioninthenewtown,andhopethatitwillbeamodelforothercounty-levelforestecologicalnetworksystemconstructioninChina.

简介：FemaleinflorescenceofBetulaplatyphyllawassampledatanintervalofeachtwodaystoanalyzethebackgroundofgeneexpressioninfloralphase.OnthebasisofSMARTstrategy,thedrivercDNAwasobtainedfromtotalRNAofthelastsampleandthetestercDNAwasfromthatoftheothersbyRT-PCRwhichweresubsequentlyusedtoconstructasubtractedcDNAlibrary.TheresultoftheESTs(expressionsequencetags)blastXshowedthatthegenesinthesubtractedcDNAlibrarycouldbemainlyclusteredinto5groupsrelatedtometabolism,transportationandsignaltransduction,cellcycle,stressresponse,andregulation.Therelationshipbetweengeneexpressionanddevelopmentwasalsodiscussed.

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简介：Amodelstandofnear-naturalforestwithanareaof3000m^2wasestablishedasacasestudyinPudongNewDistrict,ShanghaiCityin2000.Elevenspecieswereplantedinmodelstand.Asthedominantspeciesofcommunity,4evergreenbroad-leavedtreespecies,namely:Machilusthunbergii,Cyclobalanopsisglauca,C.mylsinafoliaandCastanopsissclerophyllawerechosen,accompanyingwithevergreenbroadleavedshrubspecieslikePittosporumtobira,LigustrumquihouiandDis~'liumracemosum,etc.aswellasdeciduoustreespecies,Liquidambarformosana,etc.Afterthree-yeargrowth,thecommunityphysiognomyhadchangedtobeashrubstage,andthehighesttreereachedto4.6m.Aforestphysiognomywouldbeformedinabout10yearsestimated.Themethodofconstructionofnear-naturalforestthathadbeenworldwidelyappliedwouldalsoplayakeyroleintheconstructionofurbanforestinChina.

简介：我们在北伊朗的多山的森林里根据包含的山腰材料(土壤或岩石)和山腰坡度的类型调查了邻近小量的道路的树看台的损坏的分发和频率。80个阴谋的一个总数系统地并且随机被取样记录损坏的树(弯曲，压碎并且伤害)由在道路的边的山腰坡度和材料的班。树在岩石斜坡伤害并且压碎比在有黏土的混合的山腰显著地大(p?45%是比在有斜坡坡度的山腰上更经常的2，8.5和2.3次<15%为分别地弯曲，压碎并且伤害。类型和最经常的损坏改变的损坏分发是树伤害(p?

简介：为杂草的成功理解原因，我们调查了叶建设，和米饭和它的主导的杂草的某些ecophysiological特点的精力充沛的费用。在在所有杂草之中的生理的基础上，CaesuliaaxillarisRoxburgh被发现最严肃，由Echinochloacruss-galliL列在后面。Beauv和EchinochloacolonumL。连接，当时FimbristylismiliaceaeL。Vahl和CyperusiriaL。是稻田的中等杂草。C。axillaris在一个集体基础(1.15g/g)上并且在一个联合起来的区域基础(22.93g/m2)上有最低的叶构造费用(LCC)。比较地更高的特定的叶区域，光合的率，光合的氮使用效率，叶区域比率和叶区域索引提供的C。有进一步的竞争优势的axillaris。低LCC建议杂草比庄稼更高效地利用碳资源并且潜在地在另外的竞争策略viz上花节省的精力。种子生产，生物资源生产和高相对的生长评价，它导致在杂草种子银行的低庄稼产量和增加。

简介：Forthehighbiomassandadaptability,applicationofwillowoncultivatingbioenergyforestandphytoremediationhadbeengottenmorerecognitionintheworldwide.Integratedwithourresearchpractice,weintroducedthegermplasmofhighbiomasswillowinChina,andthenewvarietieswithhighbiomassandtheircultivatedtechniquesweresummarizedinthisarticle.Moreover,wereportedthedevelopmentuptodateinbreedingandcultivationonwell-bredwillowwithhighbiomassandanalyzedtheforegroundofestablishingindustrialwillowwithhighbiomassinChina.

简介：对土地资源及其综合生产潜力的评价，在于阐明特定时空土地资源的性质、特点、生产潜力和利用价值的水平，为合理利用土地、充分挖掘生产潜力提供科学依据；对于地形起伏大、生态环境脆弱、土地类型丰富，但总体质量偏低的北京石质山区的进一步治理、规划和建设来说，显得尤为重要，亦有着鲜明的实际意义．该文在分析土地评价概念的基础上，界定了土地综合生产潜力的内涵，利用模糊数学、统计学、系统分析等手段，采用定性和定量分析相结合的方法，结合北京石质山区特定时空上土地单元的自然及社会属性，对土地综合生产潜力评价指标选取的基本条件、构建指标体系的基本原则和方法等加以探讨，提出了土地综合生产潜力评价模型，并应用于密云水库上游黄峪口小流域，得到理想效果．

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