简介：TheeconomictransformationinChinahascausedsignificantchangestolaborrelations.Ithasmadethelaborrelationsmorecomplexandlaborconflictsapparentandfrequent.Howeverthecoordinationmechanismhasnotbeendevelopedcorrespondingly.Basedontheempiricalresearchuponcurrentdomesticandoverseaslaborrelations,itisconcludedthatthesupplyoflaborforceexceedingthedemandofitisthefundamentalreasonsforexplaininglaborconflictsintheeconomictransformationinChina.Italsosuggestedthatthecoordinationmechanismoflaborconflictshasmechanicaldysfunctionandthestructureofharmoniclaborrelationswouldtakealongtime.

简介：与木头纤维素合成联系的UGPase基因被变成C。用调停Agrobacterium的遗传转化的方法的acuminata，；一个有效转变系统为C被开发。根据几的评估，影响调停Agrobacterium的脱氧核糖核酸转移的因素评估的acuminata。当pre有教养的叶将生物的活组织移植于培养基中培养为10min感染相应于OD600(0.5)的一种Agrobacterium文化时，最高的转变率被完成，；在三天的将生物的活组织移植于培养基中培养新生媒介上有教养。南部的杂交的结果证明到一根UGPase基因探针的kanamycin抵抗的射击的genomic脱氧核糖核酸证实了transgene的集成。转变效率(6%)在优化转变过程下面被完成。这个系统应该便于重要有用基因的介绍进C。acuminata。

简介：

简介：Thecalcareousfluvo-aquicsoilwascollectedandamicrocosmstudywascarriedoutwithroot-matandfrozenslicingmethodinlaboratory.ThepHintheroot-soilinterfacewiththecontroltreatmentwasjustslightlylowerthaninthebulksoil.However,theadditionofNH4--NsignificantlydecreasedthepHvalueintheroot-soilinterfaceandtheadditionofNo3-NslightlyincreasedthepHvalueintheroot-soilinterface.ThemagnitudeofpHchangesintheroot-soilinterfacedependedupontheconcentrationsofthenitrogensourcesadded.ThecontentsofCa2-P,Fe-PandAl-Pintheroot-soilinterfaceweremuchloweraftertreatedwithNH4-NandslightlyhigheraftertreatedwithNo3-Ncomparedwithcontroltreatment.Aftertreatedwith100,200and400mg·kg-1NH4+-N,thedeficiencyratesofCa2-Pinthearea0-1mmfromtherootplanewere37.1%,45.9%and57.7%,respectively,thedeficiencyratesofFe-Pwere23.4%,29.1%and38.2%,respectively,andthedeficiencyratesofAl-Pwere25.1%,28.0%and33.2%,respectively.ComparedwiththecontrolthedeficiencyratesofCa8-PinNH4+-NandNo3-Ntreatmentsdecreasedandincreased,respectively,butthedifferenceswerenotobvious.ThecontentsofCa10-PandO-Pintheroot-soilinterfacedidnotsignificantlychangeaftertreatedwithNH4+-NorNo3-N,suggestingthatCa10-PandO-PwereremarkablydifficulttobemobilizedevenatthepresenceofhighconcentrationofNH4+-N.TheloweredpHintheroot-soilinterfaceinducedbytheadditionoftheNH4-Npromotedthetransformationofphosphatesintheroot-soilinterface,enhancedthemobilizationandbioavailabilityofphosphates,andtherebyremarkablyincreasedtheabsorptionofphosphorusbyroots.

简介：Elevatedatmosphericnitrogen(N)depositionhasbeendetectedinmanyregionsofChina,butitseffectsonsoilNtransformationintemperateforestecosystemsarenotwellknown.WethereforesimulatedNdepositionwithfourlevelsofNadditionrate(N0,N30,N60,andN120)for6yearsinanold-growthtemperateforestinXiaoxing’anMountainsinNortheasternChina.WemeasuredgrossNtransformationratesinthelaboratoryusing15NtracingtechnologytoexploretheeffectsofNdepositiononsoilgrossNtransformationstakingadvantageofNdepositionsoils.NosignificantdifferencesingrosssoilNtransformationrateswereobservedafter6yearsofNdepositionwithvariouslevelsofNadditionrate.ForallNdepositionsoils,thegrossNH4+immobilizationrateswereconsistentlylowerthanthegrossNmineralizationrates,leadingtonetNmineralization.Nitrate(NO3-)wasprimarilyproducedviaoxidationofNH4+(i.e.,autotrophicnitrification),whereasoxidationoforganicN(i.e.,heterotrophicnitrification)wasnegligible.Differencesbetweenthequantityofammonia-oxidizingbacteriaandammonia-oxidizingarchaeawerenotsignificantforanytreatment,whichlikelyexplainsthelackofasignificanteffectongrossnitrificationrates.GrossnitrificationratesweremuchhigherthanthetotalNO3-consumptionrates,resultinginabuild-upofNO3-,whichhighlightsthehighriskofNlossesviaNO3-leachingorgaseousNemissionsfromsoils.ThisresponseisoppositethatoftypicalN-limitedtemperateforestssufferingfromNdeposition,suggestingthattheinvestigatedold-growthtemperateforestecosystemislikelytoapproachNsaturation.