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简介：提供热和冷来源的一个改进测试钻塔被用来执行热反应测试(TRT)，和线来源当模特儿被用于数据分析。决定测试的入口和插头之间的温度差别很好的原则能使加热或冷却的率不变，与测试钻塔的一种减少的尺寸一起。在线来源模型的influencial因素之中，温度差别作为最重要被决定，它同意了测试结果。当石子作为装填材料被拿时，在测试加热并且冷却的热传导性放的土壤是1.883有(m??ㄠ?″吗？？

简介：RedsoilisaveryimportantsoilresourceinsouthernChina.However,duetobeingsimultaneouslyofhighproductivepotentialitiesandseverelydegraded,itneedsharnessingurgently.RedSoilResourceInformationSystem(RSRIS)basedonremoltesensingandgeographicinformationsystem(GIS)playsanimportantroleinsurvey,evaluation,utilziationandmanagementofredsoilresource.RSRISofQuzhouCity,ZhejiangProvince(1:250000)andRSRISofLongyouCounty,ZhejiangProvince(1:50000)havebeenmaderespectivelyonSUNSPARCstationandusingRC/INFO.Thispaperintroducesthesystemdesign,databsecreationandsystemfunctions,anditparticularlyfocusesondevelopingappliedmodels,suchasredsoilresourcedivisonandmapping,suitabilityevaluation,erosionriskevaluation,plantutilizationzoneetc.TheproblemsonstudyofRSRISanditsdevelopingstrategyarealsodiscussed.

简介：INTRODUCTIONTheinsolublephosphateswhichcannotbedirectlyabsorbedbyplantsarethemaiformsofinorganicphosphateinsoil.Thesekindsofphosphatescanbesolubilizedbyseveralspeciesofbacteriawhicharewidelyspreadinsoilespeciallyinrhizospherewhere70%ofthebacteriaarecapableofsolubilizinginorganicphosphate.Manyresearchersre-

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简介：农业土地的放弃为生态系统导致所在地、远距离的后果。在这研究，105降雨模拟在西班牙在地中海带的农业陆地被执行(在M的葡萄园

简介：Biocharcouldhelptostabilizesoilorganic(SOM)matter,thussequesteringcarbon(C)intothesoil.Theaimofthisworkwastodetermineaneasymethodi)toestimatetheeffectsoftheadditionofbiocharandnutrientsontheorganicmatter(SOM)mineralizationinanartificialsoil,proposedbytheOrganizationforEconomicCo-operationandDevelopment(OECD),amendedwithglucoseandii)tomeasuretheamountoflabileorganicmatter(glucose)thatcanbesorbedandthusbepartiallyprotectedinthesamesoil,amendedornotamendedwithbiochar.Afactorialexperimentwasdesignedtochecktheeffectsofthreesinglefactors(biochar,nutrients,andglucose)andtheirinteractionsonwholeSOMmineralization.Soilsampleswereinoculatedwithamicrobialinoculumandpreincubatedtoensurethattheirbiologicalactivitieswerenotlimitedbyasmallamountofmicrobialbiomass,andthentheywereincubatedinthedarkat21℃for619d.PeriodicalmeasurementsofCmineralizedtocarbondioxide(CO_2)werecarriedoutthroughoutthe619-dincubationtoallowthemineralizationofbothactiveandsloworganicmatterpools.Theamountofsorbedglucosewascalculatedasthedifferencebetweenthetotalandremainingamountsofglucoseaddedinasoilextract.Twodifferentmodels,theFreundlichandLangmuirmodels,wereselectedtoassesstheequilibriumisothermsofglucosesorption.TheCO_2-Creleasestronglydependedonthepresenceofnutrientsonlywhennobiocharwasaddedtothesoil.ThemineralizationoforganicmatterinthesoilamendedwithbothbiocharandglucosewasequaltothesumofthemineralizationofthetwoCsourcesseparately.Furthermore,asignificantamountofglucosecanbesorbedonthebiochar-amendedsoil,suggestingtheinvolvementofphysico-chemicalmechanismsinlabileorganicmatterprotection.

简介：Knowledgeofthemorphologicaldynamicsofawatercourseisessentialformanagementofreservoirsiltation.WithanexampleofsedimentationinareservoirinBasilicata,Italy,thispaperdemonstratestheeffectonreservoirsiltationofthehydraulicworks,whichareaimedtoreducesedimenttransportalongthefluvialnetworkandtopreventpartofthesedimentdischargefromreachingthelake.Theeffectdependsontherivertypeandonthethegeologicalfeaturesofriverbasinslopes.Thepaperalsoshowshowmasserosioncansignificantlycontributetodevelopmentofreservoirsiltation.Finally,preliminaryresultsareprovidedaboutthetimeneededforrivertrainingworkstobeeffective.

简介：TheaimofthisworkisanimprovementoftheparameterizationofthesoilmoistureintheschemeoftheLandSurfaceProcessModel(LSPM)forapplicationsoverdesertareas.Infact,inverydryconditions,thewatervapourfluxplaysanimportantroleintheevaporationprocessesandinfluencestheundergroundprofilesofhumidityandtemperature.TheimprovedversionofsoilmoistureparametcrizationintheLSPMschemehasbeencheckedbyusingthedatatakenfromthedatabaseofthefieldexperimentHAPEX-Sahel(Hydrology-AtmospherePilotExperimentintheSahel,1990-1992).ModelsimulationsrefertothreedifferentstationslocatedinNiger(Fallow,MilletandTigersites)whereinputdataforLSPMandobservationsweresimultaneouslyavailable.TheresultsofsimulationstakingintoaccountthewatervapourfluxinthesoilmodelLSPM,seemtocomparebetterwiththeobservedbehaviourofsoilmoistureandturbulentheatfluxesthanthoseoverlookingthewatervapourflux,confirmingthegreatimportanceofthewatervapourinsuchdryconditions.

简介：Effectsofnitrogenfertilizer,soilmostureandtemperatureandtemperatureonmethaneoxidationinpaddysoilwereinvestigatedunderlaboratoryconditions.Additionof0.05gNkg^-1soilasNH4ClstronglyinhibitedmethaneoxidationandadditionofthesamerateofKClalsoinhibitedtheoxidationbutwithmoreslighteffect,suggestingthattheinhibitoryeffectwaspartlycausedbyincreaseinosmoticpotentialinmicroorganismcell,NotonlyNH4^+butalsoNO3^-greatlyaffectedmethaneoxidation.Ureadidnotaffectmethaneoxidationinpaddysoilinthefirsttwodaysofincubation,butstronginhibitoryeffectwasobservedafterwards.Methanewasoxidizedinthetreatedsoilwithanoptimummoistureof280gkg^-1,andair-dryinginhibitedmethaneoxidationentirely.Theoptimumtemperatureofmethaneoxidationwasabout30℃inpaddysoil.whilenomethaneoxidationwasobservedat5℃or50℃。

简介：在这处理了纸从在福建的Changtai枇杷果园为土壤转化酶和urease是在土壤和活动参数的Cu内容之间的关系省。土壤转化酶活动和最大的反应速度(酶运动参数：V最大和V最大/Km)没与Cu集中有显著否定关联，但是Cu集中在转化酶K在在Cu和转化酶之间的反应上显示可逆竞争抑制的m,。土壤urease活动和最大的反应速度(V最大,V最大/Km)与Cu集中有显著否定关联，并且在这个方面，当土壤的生态的索引由Cu弄脏，他们能被使用。稍微可变的Km显示在Cu和土壤urease之间的非可逆的竞争抑制。Cuconcentration=在土壤的2.00mg·L−1是中等Cu污染水平的一口陈述语气。

简介：Urbanindustrialwastelandmighthavebeenaffectedbytoxicandhazardoussubstancesemittedbytheoriginalproductionactivities.Consequently,pollutionsurveyanalysisandenvironmentalriskassessmentshouldhavebeenconductedbeforeredevelopment.Inthepaper,bysurveyingsoilsamplefromwastedump,tailingpondandsurroundingareainLead-ZincMine,fuzzymathematicsmethodwasadoptedtoestablishFuzzyComprehensiveEvaluationmodelastoanalyzeconditionsofsoilpollutionbyheavymetalandsoilnutrient.ItwouldprovideimportantscientificbasisforpollutioncontrolandecologicalrestorationintheminingareaandthuscarryoutcomprehensiveecologicalrestorationinLead-ZincMine.FuzzyComprehensiveEvaluationresultsindicatedthatsoilpollutionbyheavymetalweresevere.Itcouldgiveprioritytodevelopforestry.MostdeficientsoilnutrientelementswereavailablePandN.Duetothelackofnitrogenandphosphorus,itwasnecessarytoimprovethesoilbeforephytoremediation.

简介：Phosphorus(P)isalimitedresourcethatcouldbedepleted.Consequently,recyclingthePcontainedinsewagesludge,includingsewagesludgeincinerationash(SIA),fromwastewatertreatmentplantsisapossibilitytobeexplored.Agreenhouseexperimentusingannualryegrass(LoliummultiflorumL.)wasperformedwithanexperimentaldesignofthreecompletelyrandomizedblocksoftwosoilsand29treatments:onecontrolwithoutPandtwolevelsof9and26kgtotalPha-1from14differentsources:twelveSIAs(notcontaminatedbytracemetals)fromtheUSandCanada,onecommercialsyntheticfertilizer(triplesuperphosphate(TSP)),andonecommercialrockphosphate(RP).Higherryegrassbiomasslevelswereachievedatthehigherfertilizationrate(26kgtotalPha-1)andwhenusingtheSIAswiththehighestPsolubilitypercentage(PSP)(≥54%oftotalP).ThebiomassincreasesfollowingSIAapplicationwereashighas29%and59%morethanthecontrolforthesandyloamandclayeysoil,respectively,but40%lessthaninTSPforbothsoils.AsimilarbehaviorwasobservedforPuptake,withamaximumincreaseof26%fortheclayeysoil,and165%forthesandyloamsoil.TheryegrassbiomassandPuptakeincreasesduetoSIAapplicationwerelargerthanthoseduetoRPapplicationintheclayeysoil,butsimilartothoseinthesandyloamsoil.TheSIAswithaPSPof≥54%significantlyincreasedsoilavailablePstocksandsaturation.Accordingtoourfindings,weconcludethattheSIAsfrommunicipalandagrifoodindustrieshaveapotentialforPagriculturalrecycling,buttheirefficienciesvary.

简介：Twenty-threeprogressiveextractionswereperformedtostudyindividualhumicacids(Has)andhuminfractionsfromatypicalblacksoil(Mollisol)inHeilongjiangProvince,Chinausingelementalanalysisandspectroscopictechniques.After23HAextractionstheresiduewasseparatedintohighandloworganiccarbonhuminfractions.HAyieldwasthehighestforthefirstextractionandthengraduallydecreasedwithfurtherextractions.Organiccarbon(OC)ofthehuminfractionsaccountedfor58％oftotalOCevenafter23successiveHAextractions.Inaddition,theatomicC/HratiodecreasedduringthecourseofextractionwhileC/Oincreased;theE4/E6ratiofromtheUVanalysisdecreasedwithfurtherextractionwhileE2/Eaincreased;thebandassignedtoaliphaticcarbon(2930cm-1)inthediffusereflectanceinfraredFouriertransformspectroscopy(DRIFTS)spectragraduallyincreasedwithprogressiveextraction;thecalculatedratioofthesumofaromaticcarbonpeakheightstothatofaliphaticcarbonpeakheightsfromDRIFTSspectradeclinedwithextractions;andnuclearmagneticresonance(NMR)datasuggestedthatHAaliphaticcarbonsincreasedwithextractionswhilearomaticcarbonsdecreased.Thus,hydrophobicityandaliphaticityofHasincreasedwithextractionswhilepolarityandaromaticitydecreased.Thesedatashowedsubstantialchemical,structural,andmoleculardifferencesamongthe23Hasandtwohuminfractions.Therefore,theseresultsmayhelpexplainwhysoilandsedimenthuminfractionshavehighsorptioncapacityfororganiccontaminants.

简介：-Dynamicinteractioncharacteristicsofthemodeldeeplyembeddedplatformandfoundationsoilarestudiedbymeansofdynamicsubstructuringinterfacetransformationsynthesisanddynamiccondensation.Thetheoreticalanalysis,computerprogramsandpracticalexamplesarepresented;andtheresultsarecomparedwiththoseobtainedbystaticalcondensationmethodandfiniteelementmethod.

简介：Undisturbedsoilcorewithmanymacroporesanddisturbedsoilcorewithonlyonemacropore(diameteris10mm)wereprobedbyx-raycomputedtomography(CT).Thesize,number,shapeandcontinuityofmacroporesinthetransverseandverticalsectionsofsoilwerecharacterizedusingCTscanningimages.TheprobabilitydensitiesofmacroporesinthetransversesectionofsoilcoreexhibitedalogarithmicΓdistribution.ResultsindicatedthatCTscanningwasapromisingnondestructivemethodforcharacterizingmacroporesinsoils.

简介：Themechanismsofseismically-inducedliquefactionofgranularsoilsunderhighconfiningstressesarestillnotfullyunderstood.Evaluationofthesemechanismsisgenerallybasedonextrapolationofobservedbehavioratshallowdepths.ThreecentrifugemodeltestswereconductedatRPI'sexperimentalfacilitytoinvestigatetheeffectsofconfiningstressesonthedynamicresponseoradeephorizontaldepositofsaturatedsand.Liquefactionwasobservedathighconfiningstressesineachofthetests.Asystemidentificationprocedurewasusedtoestimatetheassociatedshearstrainandstresstimehistories.Thesehistoriesrevealedaresponsemarkedbyshearstrengthdegradationanddilativepatterns.Therecordedaccelerationsandporepressureswereemployedtogeneratevisualanimationsofthemodels.Thesevisualizationsrevealedaliquefactionfronttravelingdownwardandleadingtolargeshearstrainsandisolationofuppersoillayers.

简介：福雷斯特土壤是自然环境的一个重要部件，并且是许多生物活动的主要媒介。在这研究，由开凿者和推土机(重设备)的土壤损失和排水量在切割上被测量并且充满位于Mazandaran省的森林道路的斜坡，伊朗。土壤损失的体积被切并且充满的斜坡变丑在之间的prismoidal分析估计两次处理(在subgrading和二年下面以后)在斜坡班上3050%和5070%。土壤损失的重量被乘土壤损失(cm3)的体积到一般体积密度(1.3g/cm3)计算。土壤由重设备代替了区域根据土工作被评估宽度。结果显示那台重设备在变丑上有重要效果切斜坡坡度并且充满斜坡长度(p<0.0001)。在二年的时期期间，切割(p<0.0002)并且充满(p<0.0001)斜坡坡度显著地在不同斜坡班上被使变形。由开凿者和推土机的平均土壤损失分别地是160.35t/hayr和429.09t/hayr。而且，土壤由推土机在subgrading进程期间代替了区域比在二个斜坡类上的开凿者大(p<0.05)。玷污损失，在森林道路的排水量能被在subgrading工程使用强大的开凿者减少，特别在陡峭的地面。

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