简介:ThefuelbreakswereestablishedinsouthChinafrom1950s.Withtheactiveworkoflocalcommunitiesandstategovernment,thefuelbreakshavebeenbuiltfor398,000kilometers.Insomeareas,fuelbreaksandfirebreakshaveconstructedanetworkprimarily,suchasintheprovincesofFujian,Guangdong,Guangxi.Thefuelbreakscanpreventforestfireeffectively.Thathasbeenapprovedbyactualexamplesandburningtests.Thefuelbreaksalsobenefittheforestecosystemandenvironment.Thispapermakes...
简介:ApplicationofPRRAtotheRuralDevelopmetinChinaTXApplicationofPRRAtotheRuralDevelopmentinChinaByShenYueqinZhouGuomoYuShuquanLiMin...
简介:统计生态学与分析技术和方法的前进很快发展。这份报纸在后面的方面在中国关于统计生态学做了评论:数据收集,空间并且时间模式分析,种类丰富和种类区域关系,人口动态,种类亲密关系,社区类似和社区簇分析,和社区分类。
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简介:Nativetreesplayimportantrolesinurbanforestry,suchasadeepculturalbackground,astrongecologicaladaptability,ahighperformance-costratioandaconvenientmanagement.Butnowtherearesomedifficultiesinnativetrees'utilizationandpopularizationduetofewstudyonlandscapeplant.Inordertoseekanabnormalandartificiallandscapingandtoproduceaneffectiveresultassoonaspossible,nativeandforeignplantscanbeproperlyusedasanavailableresourcebyimprovingtheirtechnologicallevelandemphasizingnaturalbalance.ThenChineseclassiccultureandgreeneconomicscanbecombinedwithbeautifulforestrybyimplementingurbansustainabledevelopment.
简介:Organicbiocidesastimberpreservativeshavearousedmoreandmoreattention,becausemetalsaltsespeciallyarsenic,chromeandsoon,havebeensuspectedtobepoisonoustothesoilandaquaticanimals,aswellasthedisposalofpreservedtimberwastes.Therefore,anumberofeffectiveorganicbiocideshavebeenselectedtopreventwoodorbamboofromdecay,mildew,stainandsoon.Mostoftheseproductshaveenteredintothemarket.Withpeople’sincreasingawarenessoftheenvironmentalprotection,organicbiocideswilleventuallyplayimportantrolesintimberpreservationinthefuture.Thispapersummarizedthestudiesonapplicationoforganicbiocidesaswoodorbamboopreservatives,includingresistantmechanisms,commonlyappliedtypesandeffectsagainstwoodorbamboofungi,approachestodetectingtheamountoforganicbiocidesintimberandtheirinfluencesontheenvironment.Basedonthediscussionabove,theauthorspredictedthedevelopingprospectoforganicbiocidesintimberpreservation.
简介:TheApplicationofaParticipatoryApproachintheImprovementofSandyPastureLandByLongZhipuYanchiCountyislocatedonthesouthwesternbord...
简介:Eucalyptusisanimportanttreespeciesontheglobalscale,andalsoitisthemodeltreeinforestgeneticresearch.Therefore,theresearchandapplicationofmolecularmarkingtechnologyinhereditybreedingofEucalyptushaveimportanttheoreticalsignificanceandpracticalvalue.ThispaperdescribedseveralmajormolecularmarkertechnologiesandtheirapplicationtohereditybreedingofEucalyptus,andprospectedthefutureapplicationandstudyofthesetechnologies.
简介:Alloftheplantscanbecombusted.Themechanismofforestbeltsresistanceisthatthetreespeciesweren'tliabletobeburnedcomparedwithotherplantspecies.Inthispapernewconceptsonfireresistanttreesandfuel-breakstreeswerepresented.Thefireresistancemechanismincludes3aspects,fire-resistanttreespecies,rationalconstructionforestbeltsandenvironment.Treecrownscanresistfireforwarding.Forestbeltscanformtheenvironment,whichisnoteasytofire,andalsomakefuelsdistributeddiscontinuous.Thenetworkofforestbeltshaslargeareaofconiferforestsegregated.Theidealf'ireresistanttreespecieshadbettertoembracesomecharacteristics,suchashighf'ireresistance,rationalplantingandbiologicalcharacteristics.
简介:Ectomycorrhizae(ECM)isbecomingtheresearchhotspotbecauseitcanimproveplantnutrientcyclingandstorageandstrengthenplantresistancetoadversityanddisease.ItiswellknownthatECMcanenhanceplantresistancetosoil-borneandstemdiseases.Themechanismsmainlyinclude:planttenderrootswillbeprotectedwellbysheath;ECMcanfacilitateuptakeandtransportcapacityofnutritionandwatertorootsandincreaseplantsvigor;ECMcancontrolorblockpathogenstoinvadetrees;ECMcanactivateresistance-relatedenzymesofthehosts;italsocanformrhizospheremicrobialcolonyandestablishroot-rhizospheremicro-ecologicalenvironment.Somycorrhizaltechnologyhasbecomeoneofthemostimportantmethodsofecologicalcontrolandbiologicalcontrolofplantdiseases.ThispapersummarizestheapplicationanddevelopmentofECMinforestdiseasecontrolandalsoraisessomeideasontheirtheoryandapplicationresearchesinthefuture.
简介:Toimprovetheaccuracyandeffectivenessofforestpestsforecasting,basedoncurrentforecastmodel,integratingthedatabaseandWebGIStechnology,apracticaldesignandconstructionapproachofforestpestknowledgebasewasputforward,andtheforecastsystemonWebapplicationframeworkwasrealizedwithsatisfactoryempiricalresults.
简介:Elovich,parabolicdiffusion,powerfunctionandexponentialequationswereusedtodescribeKdesorptionkineticsof12soilsinaconstantelectricfieldofelectro-ultrafiltration(EUF),ResultsshowedthattheElovich,parabolicdiffusionandpowerfunctionequationscoulddescribeKdesorptionkineticswellowingtotheirhighcorrelationcoefficientsandlowstandarderrors;buttheexponentialequationwasnotsuitabletobeusedinthisstudyduetoitsrelativelylowcorrelationcoefficientsandrelativelyhighstandarderrors.Thisworkestablishedsuccessfullytherelationshipsbetweentheconstants(slopeorintercept)ofkineticequationsandthebarleyresponsestoKfertilizerinthemultiple-sitefieldexperimentsandK-supplyingstatusofsoilsk,theconstantsofElovich,parabolicdiffusionandpowerfunctionequationswereverysignificantlyorsignificantlycorrelatedtothesoilavailableK,relativeyieldofbarleyandKuptakeofbarleyinNPplot.ItwassuggestedthatthekineticequationconstantscouldbeusedtoestimateK-supplyingpowerofsoils.
简介:硅(Si)经由钙硅酸盐的申请被供应了到植物到土壤;然而,因为它的低溶解度,钙硅酸盐的高剂量被要求。Nanoparticles能减少Si剂量并且被用于播种沟。这研究调查了液体Si来源的效果,即,高度可溶的硅酸盐(115.2gL1Si和60.5gL1Na2O)并且nanosilica(<200nm),在Si上,由米饭的举起种,植物木质化,植物C:N:Pstoichiometry,植物生理学,和谷物在greanhousecondistions下面用Oxisol让步。处理包括了nanosilica和可溶的硅酸盐的申请到在0,605,1210,和2420g的Si剂量播种沟哈1。植物举起和处理效果被测量累积,生理的特征,和谷物米饭产出的C和木质素内容,Si,N,和P评估。在标志叶子的硅石身体和非结晶的硅石的免职用扫描电子显微镜学被分析。液体Si的申请在与控制的关系在米饭增加了Si累积47.3%(0g哈1Si),不管Si,来源使用了。Nanosilica申请增加了叶木质素内容112.7%什么时候与那相比在控制。硅中等影响了网C吸收(增加了1.83%)并且蒸发率(增加了48.3%);然而,Si影响了既不植物生长也不米饭的谷物产量。这些结果被关於生命或不能生活的应力的缺乏在实验期间在米饭植物解释。就我们的知识而言,在巴西农业,这在植物营养上作为Si化肥和它的效果是nanosilica的使用上的第一份报告。这研究提供米饭植物吸收并且积累nanoparticles的证据;然而,进一步的研究被要求在另外的植物种类调查nanoparticles的使用。
简介:ThispaperestablishedanintegratedstandgrowthmodelofMongolianoak(ISGM_oak)usingthedatafrom61permanentsampleplotsmeasuredin1997and2007.ISGM_oakisagroupofnonlinearsimultaneousequations.Themethodofnonlinearerror-in-variablesimultaneousequationsisusedtoestimatetheparametersofISGMoakwiththestatisticalsoftwareForstat2.0,sotheparameterestimationofthegroupofcorrelatedequationsinISGMoakisunbiasedandtheequationsarecompatible.Modelvalidationusingbootstrapmethodshowedthatboththeaveragerelativeerrorandsquareerrorarelessthan15percent.TheISGM_oakmodelcanbeusedtosimulatethestandgrowthwithdifferentvaluesofsiteindex,standdensityandtodrawstanddensitymanagementdiagramfordecision-making.
简介:在高地条件下面的米饭的Mycorrhizal地位用potted幼苗被学习。根殖民在旧米饭种的7~70天的一个年龄系列上在17.35%和37.18%之间改变了的arbuscularmycorrhizal真菌(AMF)的百分比。AMF根殖民被增加直到3542天,根殖民稳定地在以外衰退了。泡在二个星期以后出现了并且在第35天到达了他们的最大的紧张。arbuscules在第42天(2.93%)晚被形成并且稍微变化了直到第70天(3.03%)。而过磷酸钙处理不在植物生长上标记影响,脲申请的更高的剂量压制了植物生长。通常,这些农业化肥的申请在米饭植物在AMF的菌丝的殖民上登记了更少的影响,而arbuscular殖民被化肥的更高的剂量不利地影响。由于全身的杀真菌剂,carbendazim和thiophanate甲基的申请在植物生长和他们的AMF殖民有显著减少。杀真菌剂的单个水花的申请在多重水花上是不太有害的。