简介：ByreferenceoftheevaluativedataofforestbiodiversitychangesinChinafrom1973to1998,thevariationanalysismodelsofthepressureindexofforestbiodiversity,forestecosystemdiversityandforestspeciesdiversity,aswellasthegeneralindexofforestbiodiversityaredevelopedusingStatisticalPackagefortheSocialSciences(SPSS).Furthermoreestablishedistherelevantmodelofmutationofforestdiversitypotentialfunctions.Thispaperpointsoutthatchangesofforestbiodiversity...

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简介：Asternovi-belgii的香精油的成分被GC和GC/MS分析。18座山峰被GC分开，14混合物被识别。为香精油的99.10%GC山峰区域的识别成分报道。Asternovi-belgii的主要化学成分是-Pinene(38.33%)，-pinene(31.23%)，和thujene(16.71%)。

简介：Basedonthedatafrom2002to2010,thepaperanalyzedthesituationoftimbersupplyanddemandinChina,andconcludedthatsupply-demandcouldbebalancedbasicallyiftakingaccountingoftimberimport.BasedonthedatafromtheSeventhNationalForestryInventory,thepotentialofprovidingtimberfromnaturalforestandplantationwasanalyzed.ThepaperalsoforecastedthefuturefeaturesandtrendoftimbersupplyanddemandinChina.Intheend,strategicmeasuresandtechnologicalandpolicygua...

简介：Forestryisanimportantindicatorofacountryandregion’scivilization,alsoanimportantcomponentofthecountry’snationaleconomy;theparticipationofbroadmassestoforestryproductiondirectlyinfluencethemtomakethemostoftheirforestryproductioninitiativesandintegratedbenefitsoflocalforestry.Withtheincreasingdevelopme

简介：TheshortageofforesttendingfundsinChinahascausedtheretardedthinningforthoseforeststhatneedurgentlythetendingthinning,whichinturnhasanegativeimpactontheimplementationofforestmanagementactivitiesandresultsinthepoorstateofforestquality,functionandhealthy.Thispaperanalyzedthenecessitytoimplementforesttendingsubsidies,concludedtheexperienceabroad,andproposedsomepolicyrecommendationsonhowtoimplementforesttendingsubsidiesinChina.Itwasindi...

简介：TheobjectiveofthisstudyistodeterminethepropertiesofG.amplexifolia.Inthispaper,thechemicalcomposition,includingholocellulose,acid-insolublelignin,1%NaOHsolubility,benzene-ethanolextractivesandashcontent,wasconsideredforthevariabilitywithrespecttopositionsalongbambooculmheight(bottom,middleandtop),partsalongradialdirection(innerpartandouterpart)andages(1-yearand2-year).ThetestresultswerealsocomparedtothoseofmosothatiscommonlyplantedandusedinChina.Thisstudyindicatedthatboththeholocellulosecontentandthelignincontentininnerpartwerelowerthaninouterpart,butforextractivesandashcontent,thereversewastrue.Bambooagealsohadeffectonchemicalcomposition;boththeholocellulosecontentandtheashcontentintheculmof1-yearwerehigherthanthoseof2-year,whilethelignincontentandtheextractivecontentintheculmof1-yearwerehigherthanthoseof2-year.Highholocellulosecontent,lowlignincontentandextractivecontentwereadvantagesofG.amplexifolia.

简介：Forestpropertymortgageopensupanewfinancingchanneltorevitalizeforestresourcesassets,buttherearemanyrestrictionstoforestpropertymortgageloanfromrelevantlegalnormsandpracticesconcerningmortgageloanpolicies.Thepaperanalyzedtheinstitutionaldilemmaofforestpropertymortgageloaninaccordancewithrelevantlawsandpolicies,andthenmadetherecommendations,inordertoprovideameaningfulreferencetoperfectforestpropertymortgageloan.

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简介：Inthisstudy,28,691genomesequencesand16,566expressedsequencetags(ESTs)ofEucalyptuswerederivedfromtheGenBankdatabase.Atotalof2292SSRlociweresoughtoutfrom1785effectivesequences.ThroughanalysesofSSRlociinformation,theSSRmotiflengthwasnegativelycorrelatedwiththeabundanceoftheSSRs.IntheESTsequencesofEucalyptus,tripletrepeatmotifswerethemostabundant,anddinucleotiderepeatsmotifshadthehighestfrequencies.Subsequently,395pairsofprimersweredesignedbasedontheSSRloci.UsingoptimizedSSR-PCRconditions,340pairsofprimersweresuccessfullyscreened,withasuccessrateof86.1%.Byconstructionofamaximumlikelihoodphylogenetictreeofsixeucalyptspecies,representedbyfivespeciesofthegenusEucalyptusandoneofthegenusCorymbia,thegeneticrelationshipsofEucalyptusurophyllaandE.camaldulensissuggestedbythistreewasfoundtodifferfromthatsuggestedbytraditionalmorphologicaltaxonomy.TheresultsprovideinsightsforevaluatinggeneticdiversityofEucalyptusandanalysisofEucalyptusphylogeneticsusingSSRmarkers.

简介：Asanemergingindustry,China'swoodfloorindustrydatesbacktotheearly1980s.Despitealatestart,ithasdevelopedrapidlyduringthelast20years.ThepastdecadeshavewitnessedgreatchangesinChina'swoodfloorindustry.Withhighquality,manyproducts"madeinChina"areavailablewidelyabroadnowadays.Currentglobaleconomicshocks,however,affectChina'sdomesticrealestatesector;hencethefallingdomesticsalesofwoodfloor.Thepaperaimstoidentifythecurrentsituationoffloorindustry...

简介：Thepaperfirstlyreviewedindustrialplantationdevelopmentinthemainforestrycountriesworldwide,andthensummarizedthestateandtrendoftheR&Dofindustrialplantationinforeigncountriesintermsofgeneticimprovement,breedingtechniques,siteevaluationtechniques,densitycontroltechniques,long-termproductivitymaintenancetechniquesanddiseasesandpestscontroltechniques.Inthemeantime,thethreemanagementmodelsemployedinindustrialplantationsabroadwasintroduced,i.e.int...

简介：Understandinggeneticvariationisimportantforefficientlyselectingexcellentclonesandutilizinggeneticresourcesduringtreebreeding.Weinvestigated16growthtraitsof5032-year-oldPinuskoraiensisclones.Analysesofvarianceshowedthatallthetesttraitsdifferedsignificantlyamongclones.Averageheight,diameteratbreastheight(DBH),andvolumeofallcloneswere10.41m,21.30cm,and0.148m3,respectively.Phenotypiccoefficientsofvariationandrepeatabilitiesoftraitsrangedfrom4.37to48.03%andfrom0.013to0.900,respectively.Thereexistssignificantpositivecorrelationsamongheights,diameteratdifferentheights(1.3,3.0,5.0m),andvolumes;geneticcorrelationwasclosetophenotypecorrelation.Usingfourgrowthtraits(height,DBH,volume,averagecrownwidth)asindicesforacomprehensiveevaluation,fiveclones(PK11,PK19,PK04,PK14,andPK28),whosetraitsscoredinthetop10%,wereselectedaseliteclones.Fortheseclones,geneticgainsinheight,DBH,volumeandcrownheightwere8.58,13.02,32.72and3.83%,respectively.TheseresultsprovideimportantinformationforimprovingP.koraiensisbreedingprograms.

简介：Thesimilaritytheorywassystematicallyintroduced,bycombiningthetheoryandtheanalytichierarchyprocess(AHP),andtakingthedynamicchangesoftwo-stagegreenlandpatchesinShenzhenasanexample,thepatchessimilarityofeachdistrictandeachgreenlandtypewereestimated.Thelocation,shapeandareasofgreenlandunitwereusedasthesimilarityelements.Thenthesimilaritycoefficientscanbedefined.Theoverlappingnumberofgreenlandpatchesindicatedthelocationvariationofgreenland.Theratioofminimumandmaximumshapeindexofgreenlandindicatedtheshapevariationofgreenland.Withthesamemethod,theareasvariationcoefficientwasalsoobtained.Theresultsshowsthatbasedonsimilaritytheoryandmethodtheestimationofgreenlandvariationisfeasible,whichcanprovideeffectivemethodsandaccordanceforthefurtherassessmentofgreenlanddevelopmentinShenzhenSpecialEconomicZone.

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简介：对木头开发和形成的分子的生物研究是相关基因的发现的最近的年，而是步里的焦点，他们在木头性质的控制的函数是慢的。它在另外的工具上的高产量能力，敏感，和可靠性的优点为调查能够的基因表示patternsis开发了的microarraytechniquewith很快assaying几千基因。在这研究，从开发白杨木部纸巾的二个cDNA图书馆准备的cDNAmicroarray从Populusdeltoides的主要的茎在不同高度在不成熟的木部纸巾习惯于试金基因表示模式(15?岁)，它被证实有不同木头性质(microfibrillar角度，木质的密度)旁边X光检查。有在薄片之间的微分表示侧面的274个抄本外面被屏蔽，并且单个克隆受到5定序。用生物信息的分析，我们识别了可以影响白杨木头性质的候选人基因，许多哪个属于各种各样规章并且信号transduction基因家庭例如锌手指蛋白质抄写因素，DNA有约束力的抄写因素，乙烯反应因素等等。结果建议这些基因可以调整涉及木头形成的酶。进一步的工作将被执行克隆这些基因并且决定他们怎么影响白杨木头性质。

简介：Background:Landscapesconsistofheterogeneousinteractingdynamicelementswithcomplexecological,economicandculturalattributes.Thesecomplexinteractionshelpinthesustenanceofnaturalresourcesthroughbio-geochemicalandhydrologicalcycling.Theecosystemfunctionsarealteredwithchangesinthelandscapestructure.Fragmentationoflargecontiguousforeststosmallandisolatedforestpatcheseitherbynaturalphenomenaoranthropogenicactivitiesleadstodrasticchangesinforestpatchsizes,shape,connectivityandinternalheterogeneity,whichrestrictthemovementleadingtoinbreedingamongMetapopulationswithextirpationofspecies.Methods:Landscapedynamicsareassessedthroughlanduseanalysisbywayofremotesensingdataacquiredatdifferenttimeperiods.Forestfragmentationisassessedatthepixellevelthroughcomputationoftwoindicators,i.e.,Pf(theratioofpixelsthatareforestedtothetotalnon-waterpixelsinthewindow)andPff(theproportionofalladjacent(cardinaldirectionsonly)pixelpairsthatincludeatleastoneforestpixel,forwhichbothpixelsareforested).Results:UttaraKannadaDistricthasthedistinctionofhavingthehighestforestcoverinKarnatakaState,India.Thisregionhasbeenexperiencingchangesinitsforestcoverandconsequentalterationsinfunctionalabilitiesofitsecosystem.Temporallanduseanalysesshowthetrendofdeforestation,evidentfromthereductionofevergreen-semievergreenforestcoverfrom57.31%(1979)to32.08%(2013)Forestfragmentationatthelandscapelevelshowsadeclineofinteriorforests64.42%(1979)to25.62%(2013)andtransitionofnon-forestcategoriessuchascropland,plantationsandbuilt-upareas,amountingnowto47.29%.PCAprioritizedgeophysicalandsociovariablesresponsibleforchangesinthelandscapestructureatlocallevels.Conclusion:TerrestrialforestecosystemsinUttaraKannadaDistrictofCentralWesternGhatshavebeenexperiencingthreatsduetodeforestationwithlandusech

简介：ThepaperanalyzesthesedimentsourceofwatershedbymeansofstudyingwatershedinwestemShanxioftheLossesPlateau.Onthebasisofwatershedsclassification,7typicalwatershedswerechosenandobservedfor11years.Theresultshowsthatthesedimentatthesmallwatershedmainlycomesfromgullies,whichis60%ofthetotalsediment.Erosionmodulusofvalley(includinggullyhead,gullybed,valleyside)is1.28-2.48timesasthatoftheareabetweenchannels(includinghillslopeandmoundoftheLoessPlateau).Themainsedimentsourceofslopeerosioniscultivatedlandonslopewithoutwaterandsoilconservationmeasures.

简介：Climateisadominantenvironmentalfactorinbuildingecosystemstructureanddrivingbioticdynamicswithtopographicdependenceonspatialdistribution.Thispaperdemonstratestheapplicationofinterpolationtechniquetodescribespatialclimatedistribution.Adigitalelevationmodel(DEM)inresolutionof0.01degreeoflatitudeandlongitudehasbeendevelopedbecausetheincorporationofspatialdependenceontopographyiscrucialtoaccuracyofinterpolation.Climatedatafromsparseanddiscr...

简介：Guggal，对西方的印度地方性的威胁的种，被拍提取当做药重要oleo-gum-resin(guggul)。然而，植物在口香糖渗出以后死。本地人使用的土生土长的拍技术在Gujarat被检验，在这些技术后面发现科学基础的印度：口香糖inducer，拍的季节，和植物的选择分开被拍。首先，Xanthomonasaxonopodispv的存在。在使用拍的口香糖暂停的commiphorae(Xac)被建立。这个细菌导致从拍的植物流着的口香糖并且以后，引起他们开死。在口香糖的Xac的人口被发现与口香糖的年龄减少。与那，新鲜口香糖增加了拍的成功。第二，本地人比较喜欢在温暖的季节期间拍，吗我们由决定Xac生长在30略潤潭慮?楤業畮慴?是最好的验证了哪个?桓杩汥慬????????????????????????楦浲獵??‰???堠湡桴浯湯獡？？