简介：Solanesol是在在Nicotianatabacum的solanesol的Nicotianatabacum.Distribution的重要第二等的代谢物被高效LiquidChromatography(HPLC)调查方法。在N的各种各样的机关andtissues的solanesol的量的分发。tabacum显示出那个solanesol内容，在所有机关显然不同，在梗比那在叶子高6.8,18.3，27.5，45.8，和68.0倍，花，种子，fruitsand根分别地。在叶，梗和花weredetermined的各种各样的部分的solanesol的内容。在最高的叶，中间的叶和底部叶的solanesol的内容逐渐地减少了(6.124，5.813和5.687mg·g~(-1),分别地)并且在各种各样的叶部分(叶顶，叶中间和叶底)的solanesol的内容逐渐地也减少了。在topstalk的solanesol的内容分别地在中间的梗和底部梗比那高是1.19次和1.92次。在梗(外皮，外皮和石碑)的各种各样的纸巾的solanesol的内容戏剧性地减少了。萼片包含了solanesol的更高的集中(1.192mg·g~(-1))compared到在花的任何另外的部分。学习将为solanesol的规定andcontrol提供基础数据，而且，它将为N的rationaldevelopment和利用提供科学证据。tabacum资源。

简介：PiceamongolicaisanendemicandendangeredspeciesinChina.EcosystemmadeofPiceamongolicaisaspecialsandyforestecosysteminChina.Itisfoundatecotonebetweenforestandsteppe,oragriculturaldistrictandpastoralarea.Basedoninvestigation,thispaperdiscussedtheformationanddistributionofPiceamongolicaandstudieditsnatureaccordingtoecotonetheory.ItisclarifiedthatPiceamongolicabelongstoPiceameyeriseries.Thatistosay,itbecamealocalracethroughlong-termadaptationtothelocalclimate,thenformedallopatricsemi-species,andfinallyturnedintoataxonomicalspecies.Piceamongolicaforestisasuperzonalclimaxcommunitydevelopinginecotonebetweenforestzoneandsteppezone.

简介：Background:Europeanforestsareconsideredacrucialresourceforsupplyingbiomasstoagrowingbio-economyinEurope.ThisstudyaimedtoassessthepotentialavailabilityofforestbiomassfromEuropeanforestsanditsspatialdistribution.Wetriedtoanswerthequestions(i)howisthepotentialforestbiomassavailabilityspatiallydistributedacrossEuropeand(ii)wherearehotspotsofpotentialforestbiomassavailabilitylocated?Methods:Thespatialdistributionofwoodybiomasspotentialswasassessedfor2020forstemwood,residues(branchesandharvestlosses)andstumpsfor39Europeancountries.UsingtheEuropeanForestInformationSCENario(EFISCEN)modelandinternationalforeststatistics,weestimatedthetheoreticalamountofbiomassthatcouldbeavailablebasedonthecurrentandfuturedevelopmentoftheforestage-structure,growingstockandincrementandforestmanagementregimes.Wecombinedtheseestimateswithasetofenvironmental(siteproductivity,soilandwaterprotectionandbiodiversityprotection)andtechnical(recoveryrate,soilbearingcapacity)constraints,whichreducedtheamountofwoodybiomassthatcouldpotentiallybeavailable.Wemappedthepotentialbiomassavailabilityatthelevelofadministrativeunitsandatthe10km×10kmgridleveltogaininsightintothespatialdistributionofthewoodybiomasspotentials.Results:Accordingtoourresults,thetotalavailabilityofforestbiomassrangesbetween357and551Tgdrymatterperyear.ThelargestpotentialsupplyofwoodybiomassperunitoflandcanbefoundinnorthernEurope(southernFinlandandSweden,EstoniaandLatvia),centralEurope(Austria,CzechRepublic,andsouthernGermany),Slovenia,southwestFranceandPortugal.However,largepartsofthesepotentialsarealreadyusedtoproducematerialsandenergy.Thedistributionofbiomasspotentialsthatarecurrentlyunusedonlypartiallycoincideswithregionsthatcurrentlyhavehighlevelsofwoodproduction.Conclusions:Ourstudyshowshowthefo

简介：Thisstudyinvestigatedtheoccurrenceanddistributionof15phthalateesters(PAEs)insedimentscollectedfromQixinghewetlands,northeastChina.TotalconcentrationofPAEsinallsedimentsrangedfrom128.41to502.79lgkg-1,withthemeanvalueof284.61lgkg-1.PAEssignificantlydifferedamongwetlandtypes;theaveragePAEsconcentrationofsurfacesedimentswereasfollows:Phragmitesaustraliswetland(PAW,419.87±73.61lgkg-1)[Carexlasiocarpawetland(CLW,304.18±56.47lgkg-1)[Deyeuxiaangustifoliawetland(DAW,129.78±18.24lgkg-1).Dimethylphthalate(DMP),diisobutylphthalate,di-n-butylphthalate,anddi-(2-ethylhexyl)phthalate(DEHP)werefoundinallsediments,DEHPwasthemostabundantPAEscongenerswithconcentrationsvaryingfrom37.62to294.9lgkg-1.DMPandDEHPexhibitedrelativelyhigherconcentrationsinCLWandPAWwetlandsthaninDAW,indicatingthatthedifferentdeoxidizationandbiodegradationconditionscouldhaveimportantimplicationsforthedistributionpatternsofPAEsinwetlandsediments.ThevariationofPAEsconcentrationsinhorizontalandverticalsedimentswithwetlandtypescouldbeattributedtothemigrationofcontaminantsbysurfacewater,groundwaterandatmosphericdeposition.TheoccurrenceanddistributionofPAEsinwetlandsalsosuggeststhatcontaminationinnaturalecosystemsshouldnotbeoverlooked.

简介：TwoecotypesofElsholtzia,ElsholtziasplendensandE.Argyi,aredominantplantsgrowingonCuandPb-Znsmelters,respectively.SamplesofthetwoecotypesandthecorrespondingsoilsfromfieldsofacopperminingareaandaPb-ZnminingareaofZhejiangProvince,China,wereanalyzedtoinvestigateCuorZntoleranceofthesetwoecotypes.EffectsofnineCulevels(0,5,10,20,40,80,160,240and320mgCuL-1asCuSO4@SH20)ongrowthanduptake,translocationandaccumulationofCuinthesetwoecotypeswereexaminedinasolutioncultureexperiment.Theexperimentalresultsshowedthatdryweights(DW)ofshootsandrootsweredepressed,andgrowthofE.SplendenswaslessdepressedthanthatofE.Argyiwhentreatedwith≥5mgCuL-1.ConcentrationsofCuinshootsofE.SplendensandE.Argyiexceeded1000mgkg-1DWat≥40mgCuL-x.ThemaximumCuaccumulatedintheshootsofGu-treatedE.SplendensandE.Argyireached101and142μgplant-1.Furthermore,analysisofplantsamplesfromthefieldsshowedthatthesetwoecotypescantolerantexcessheavymetalsandproducedhighdrymatter,andE.Splendenscanaccumulate11.7mgCuplant-1grownontheCusmelter.Therefore,E.SplendensandE.Argyicouldbegoodplantsforphytoremediation.

简介：在Gymnemasylvestre的各种各样的机关的gymnemic酸内容被高效液体层析(HPLC)方法调查。结果表演在各种各样的机关的gymnemic酸的内容，显然不同，是54.29，31.66，28.82，27.67，25.39，20.56和1.31mg·g在射击尖端的−1DW，花，节点，叶子，内部节点，根和种子分别地。最高的gymnemic酸内容(54.29mg·g−1DW)在射击尖端被发现，在叶子(27.67mg·g−1DW)的比那高的1.96褶层。gymnemic酸(35.39mg·g−1DW)的最大的数量在年轻叶子被观察，它在旧叶子(23.07mg·g−1DW)比那高1.52倍。gymnemic酸在的内容年轻、中间、旧内部节点分别地，是26.47，25.77和23.94mg·g−1DW而在年轻、中间、旧的节点的gymnemic酸的内容是27.96，都在叶子(27.67mg·g−1DW)比那降低，28.81和29.66mg·g−1DW，分别地比那所有高在叶子。学习为Gymnemasylvestre资源的合理发展和利用提供科学证据，自从在天赋的利用上看台在自然引起了这些植物的弄空。

简介：AdistributionmapofPinusyunnanensiswasmadeaccordingtothedataongeographicaldistributionofP.yunnanensisbymeansofapplyinggeographicinformationsystemssoftwareArcGIS,andtheclimaticparametersofthedistributionareasforP.yunnanensisweredeterminedbytheclimateforecastmodelClimateChina.TherelationshipbetweenthegeographicaldistributionofP.yunnanensisandtheclimatewasstudiedbyadoptingtheindexesofKiraincludingthewarmthindex(WI),coldnessindex(CI)andaridityindex(K),Xu’shumidityindex(HI),Holdridge’slifetemperature(BT),potentialevapotranspiration(PET),potentialevapotranspirationratio(PER)andthesinglefactorsasthemeanannualtemperature,themeantemperatureinJanuary,themeantemperatureinJuly,themeanannualprecipitation,the>5℃accumulatedtemperature,the>18℃accumulatedtemperature,themaximumtemperature,theminimumtemperature,thetemperaturevariation,theratiooftemperatureandprecipitationoftheyear,etc.AndtheKira’swater-temperatureindexesondistributionalupperlimit,lowlimitandnorthlimitwerediscussed.ThemajorclimaticfactorseffectingthedistributionofP.yunnanensiswerescreenedoutbystatisticalanalysissoftwareSPSSandtheresultsshowedtheimpactfactorsareintheorderoftemperature>humidity>thetemperaturedifferencebetweenmeanwarmestmonthtemperatureandmeancoldestmonthtemperature.

简介：ElementcontentsoftreeringsandsoilsneartreerootscollectedfromDeodarcedar(Cedrusdeodara(Roxb.)G.Don)andMassonpine(Pinusmassonianalamb).weredeterminedtostudytherelationshipbetweentheangulardistributionofelementcontentsintreeringsandtheenvironmentalinformation.Thechemicalcompositionandpropertiesofsoilareverymuchcmoplicated,whichleadstothenon-uniformdistributionoftheelementcontentsintreerings.Thestatisticalmulti-varialberegressionmethodwasusedtogettheinformationofthetree-centereddistributionofelementcontentsintheenvironment(soil),(C'),C'(Z,θj),fromthedistribtuionofelementcontentsintreerings(C),C(Z,θi),whichdependsontheplaneazimuthangle(θi),i.e.,C=C(Z,θi),whereZistheatomicnumberoftheelement,withasatisfactoryresultthoughthisstudyisonlyaprimaryone.

简介：Thedistributionofrareearthelement(REE)formsinsoilsisgiveninthepresentpaperonthebasisofsequentialfractionationanddeterminationof34representativesurfacesoilscollectedfromallpartsofChina.ResultsobtainedshowthattheextractionrateofwatersolubleandexchangeableREEhadtheodd-evenphenomenonandthatoforganicallyboundREEfromLatoLutendedtoreducegraduallywiththeincreaseofatomicnumber.ThestabilityofScandtheactivityandenrichmentofTminsoilsareproposed.Furthermore,thepapermakesapreliminarydiscussiononthedifferencesintheconcentrationdistributionofvariousformsofindividualREEinsomesoils.

简介：Thedepletionrateofphosphateinthesoil-rootinterfacezoneincreasedalongwithgrowthandphosphateuptskeofwheatormaize,whichindicatedthatthephosphatedistributioninsoilneartherootsurfaceagreedwellwiththephosphatemovementinrhizosphereandphosphateuptakebyplant,Therelativeaccumulationzoneofphosphatewithin0.5mmapartfromtherootsurfacedevelopedatthe15thdayorsoaftercultivatingwheatormaizesincetherootphosphatesecretionincreasedgraduallyinthisstage.Thephosphatedistributioninthesoil-rootinterfacezoneagainstthegrowingtime(t)andthedistancefromtherootplane(x)couldbedescribedbythenon-linearregressionequationwiththethirdpowersofxandt.

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简介：AspecialinterpolationprogramGREENhasbeendevelopedtodeterminetheclimaticparametersforthedistributionregionofChinesepine(PinustabulaeformisCarr.)basedontheresearchesonthedistributionofthetreespecies.Thecentralregion,whichisthemostsuitabledistributionregion,andpotentialdistributionregionofthespeciesundercurrentclimaticconditionsweremappedusingaGeographicInformationSystemIDRISI.Accordingtotheaveragedpredictionsby5GCMsfor2030,aprojecti...

简介：ThecanopyrainfallinterceptionmodeilinkedtoenvironmentalconditionsandbiologicalfeaturesisestablishedonthebasisofstationaryobservationandmeasurementsinChina.UpscalingfromsiteobservationtoregionalIevelestimationofcanopyrainfallinterceptionhasbeenmade.ThepotentialinterceptionvalueofforestsduringtherainfallseasoninChinaaccordingtorainfallrecordsofMay,JulyandSeptemberintheyear1982,hasbeensimulatedandmappedundertheGISsoftwarepackageIdris...

简介：Amini-plotfieldexperimentwasconductedonaloamyclayOxisoltocompareandevaluatePabsorptionandtransferinplantorgansandPmovementinsoilprofileatthreePapplicationdepthsunderthesoybean-citrusintercroppingversusthemonocultureusinga32Ptracertechnique.TotalPabsorption(Pt)bysoybeanandPaccumulation(Pa)insoybeanorgansdecreasedsignificantly(P<0.05)undertheintercroppingincontrasttothemonoculture.Withintercropping,when32Pwasappliedintopsoil(15cmsoillayer),total32Pabsorption(32Pt)insoybeanswassignificantlylower(P<0.05),butwhen32Pwasappliedtodeepersoillayers(35or55cmsoillayer),32Ptinsoybeanswassignificantlygreater(P<0.05).ThepercentageofPinleavestototalP(Pa/Pt)and32Pinleavestototal32P(32Pa/32Pt)forsoybeanwere(?)25%andthoseofroot(?)12%.WhenPwasappliedintopsoiland55cmsoillayer,nosignificantdifferenceswerefoundbetweenintercroppingandmonocultureforPtofcitrus.ThePabsorbedbycitruswastransferredrapidlytothegrowingorgansofabovegroundduringtheexperiment,andthespeedoftransferringtothegrowingorgansslowedwhenPwasappliedtothedeepersoillayers.Inintercropping,Pmobilitywasheightenedinthesoilprofile,andPindeepersoillayersmoveduptotopsoilmorerapidly.

简介：第二等的森林的土壤动物社区，在Qufu的儒家墓地的Platycladus森林andQuercusacutissima森林被调查。3583个标本是镇定的，独立属于5扇门，11个班和23目。二个主导的组和9个普通的组说明94.45%全部的数字。在这三个森林产地的土壤动物在作文，生态的分发和重要索引不同。三个森林里的土壤动物的主导的组是一样，但是另外的组更极大地不同。差异索引(H)和第二等的森林里的土壤动物的平均索引(E)是最高，并且还优势索引(C)inQuercusacutissima森林最高。在每个森林产地的大多数土壤动物集合到表面土壤层。他们的种类和单个数字都是层我>II>III。它为三个森林里的土壤动物的作文是很类似的。

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简介：节省水的灌溉方法逐渐地在温室或塑料电影房子为蔬菜耕作被使用了。然而，有关土壤磷(P)行为上的节省水的灌溉方法的效果有有限信息。在这个实验，滴下并且表面下的灌溉方法被使用，与是的沟灌溉方法控制，在MollicGleysols。在整个深度的土壤P分发被灌溉方法显著地影响。全部，Olsen，器官、无机的P内容比在心土(20–30，30–40，40–50和50–60厘米)在表层土(0–10和10–20厘米)是更大的。在整个0–60厘米层在下面的OlsenP内容滴下并且表面下的灌溉处理在沟灌溉处理下面是比那低的。然而，全部、器官、无机的P从20～60厘米满足在下面滴灌溉处理比或近到在沟灌溉处理下面的那些高，但是比在沟灌溉处理下面在表面下的灌溉处理下面是更低的。在表面下的灌溉处理下面，在0–10厘米层的全部、器官、无机的P的内容是78.0%，1.3%和3.7%比那些大在10–20厘米层分别地。但是在10–20厘米层的OlsenP内容是5.7%比那大在0–10厘米层。这些建议那土壤P行为能被土壤水管理操作到某程度。

简介：ToaidinmanagementofCunninghamialanceolata,themaintimberspeciesinSouthernChina,itsvariationofspatialdistributionpatternwasanalyzed.ThreepermanentplotsofC.lanceolataplantationswithapproximatelythesamesiteconditions,setbyChinacontinuousforestinventoryinShunchang,Fujian,wereselected.C.lanceolatagrowthwasdividedintotwostages:youngtrees(5cm≤diameteratbreastheight(DBH)<10cm)andmaturetrees(DBH≥10cm).TheDBHandcoordinatesofeverytree(DBH≥5cm)inthepermanentplotswererecordedin2003and2008.ThefunctionL(r),improvementofRipley’sK(r),thepaircorrelationfunctiong(r),andtheuniformangleindex(W_i)wereusedtoanalyzethespatio-temporalvariationofspatialdistributionpatterns.Thethreepermanentplotshadmeanuniformangleindex(W)between0.494-0.578atlowaltitudes,0.465-0.477atmediumaltitudes,and0.426-0.601athighaltitudes.Resultsshowedthataltitudedidnotaffectthespatialdistributionpattern.TheL(r)andg(r)functioncurvesofmaturetreesweregenerallylowerthanyoungtrees’,i.e.tendtobemorerandomoruniformdistribution.Soregardlessoftheinitialdistributionofyoungormaturetrees,withthepassageoftime,therewasatendencyfortheaggregateddistributiontochangetoarandomdistribution,andarandomdistributiontochangetoauniformdistribution.

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?