简介：ThetransformationoforganicP(Po)fromorganicmanuresintwotypesofsoils(ultisolandentisol)andtheinfluencesofexternaladditionoforganicsubstanceorinorganicP(Pi)onPoundertheconditionofthe60%maximumwatercapacitywereinvestigated.TheresultsobtainedfromPofractionationexperimentsindicatedthatallthePofractionsexceptforthehighlyresistantPofractiondecreasedduringincubation.ApplicationofpigfecesandcowfecescouldlargelyincreaseeachfractionofPointhesoils.ImmediatelyafterapplicationoforganicmanureintothesoilsalargepartoflabileandmoderatelylabilePofromorganicmanurewastransferredintomoderatelyresistantPo,whichmightbeduetothefactthatCa-orMg-inositolPwasprecipitatedintoFe-inositolP.However,theavailabilityofPofromorganicmanureinthesoilswouldincreaseagainafterincubationbecauseofthetransformationofmoderatelylabileandresistantPofractionsintolabilePofractions.AdditionofcelluloseorPiintothesoilsshowedagoodeffectonincreasingallthePofractionsexceptforthehighlyresistantPo,andthiseffectwasmuchmorepronouncedwhencellulosewasappliedincombinationwithPi.Therefore,inviewoftheeffectoforganicmanureonimprovingPnutritiontoplant,attentionshouldbepaidtoboththePoandtheorganicsubstancesfromorganicmanure,ItissuggestedthatapplicationofPifertilizercombinedwithorganicmanuremaybereferredtoasaneffectivemeansofprotectingPifromchemicalfixationinsoil.

简介：

简介：溶解的器官的氮(穿上)因为然而，它可以两个都在滋养穷人的土壤是为植物和主导的可得到的N形式的直接N来源，最近在土壤获得了增加的兴趣它在地中海生态系统的流行仍然保持不清楚。这研究的目的到过i)估计土壤在地中海生态系统的一个宽集合穿上并且比较这为另外的生态系统与那些铺平；ii)描述时间的变化在穿上并且溶解的无机的氮(吵闹)形式(NH+4和NO−；3)，并且在植物社区以内描绘空间异质；并且iii)学习土壤的相对比例穿上并且吵闹作为Schimel和班尼特不同N形式的流行跟随的假设的测试形成滋养的可获得性的一个坡度。学习在选择代表大量地中海植被类型的十一个植物社区被执行，从对晚接连著的地位早。在学习地中海植物社区穿上集中(0–；18.2mgNkg−；1)比为另外的生态系统在文学发现的那些一致地低。我们在土壤发现了高时间、空间的可变性为所有植物社区穿上。是为滋养穷人的生态系统由Schimel和班尼特模型预言了，在铵和硝酸盐上穿上优势在冬季和春天土壤样品为大多数植物社区被观察。然而，mineral-N统治了在上在夏天和秋天穿上。因此，土壤水内容可以穿上重要效果穿上对在地中海生态系统的矿物质N优势。

简介：TheamountsofsoilnonexchangeableKextractedwith0.01mL/Loxalicacidandcitricacidsolutionsandthatwithboiling1mL/LHNO3fortenminuteswereremarkablysignificantlycorrelatedwitheachother,andtheamountextractedwiththeoxalicacidsolutionwashigherthanthatwiththecitricacidsolution.ThesoilnonexchangeableKreleasewascomprisedoftwofirst-orderkineticprocesses.ThefasteronewasascribedtotheinterlayerKinoutersphere,whilethesloweronetothatininnersphere.TherateconstantsofthesoilnonexchageableKweresignificantlycorrelatedwiththeamountsofnonexchangeableKextractedwithboiling1mL/LHNO3fortenminutes.Studyonthefitnessofdifferentkineticequationsindicatedthatthefirst-order,parabolicdiffusionandzero-orderequationscouldalldescribethereleaseofsoilnonexchangeableKwell,butElovichequationwasnotsuitabletodescribeit.

简介：Carbonofhumusacids(HSAC)anddissolvedorganiccarbon(DOC)arethemostactiveformsofsoilorganiccarbon(SOC)andplayanimportantroleinglobalcarbonrecycling.WeinvestigatedtheconcentrationsofHSAC,water-solubleorganiccarbon(WSOC),hotwater-extractableorganiccarbon(HWOC)andSOCinsoilsunderdifferentvegetationtypesoffourcopperminetailingssiteswithdifferingvegetationsuccessiontimeperiodsinTongling,China.TheconcentrationsofHSAC,WSOC,HWOCandSOCincreasedwithvegetationsuccession.WSOCconcentrationincreasedwiththeaccumulationofSOCinthetailings,andalinearlypositivecorrelationexistedbetweentheconcentrationsofHSACandSOCinthetailings.However,thepercentagesofHSACandDOCintheSOCdecreasedduringvegetationsuccession.TherateofSOCaccumulationwashigherwhenthesuccessiontimewaslongerthan20years,whereasthespeedsofsoilorganicmatter(SOM)decompositionandhumificationwereslow,andtheconcentrationsofHSACandDOCincreasedslowlyinthetailings.Thepercentageofcarbonofhumicacid(HAC)inHSACincreasedwithvegetationsuccession,andthevaluesofhumificationindex(HI),HAC/carbonoffulvicacid,alsoincreasedwiththeaccumulationofHSACandSOCinsoilsofthetailingssites.However,theHIvalueintheeachofthetailingswaslessthan0.50.ThehumificationrateofSOMwaslowerthantheaccumulationrateofSOM,andthelevelofsoilfertilitywasstillverylowinthetailingsevenafter40yearsofnaturalrestoration.

简介：这研究被进行检验蚯蚓的回答在中国的南部的副热带的区域在崽分解过程在不同分解阶段和他们的贡献玷污有机物和崽。二种植园作为学习地点被选择：地点我被异国情调的endogeic蚯蚓种类Ocnerodrilus西方人统治；地点II被epigeic种类Amynthascorticis统治。在掉落的崽和蚯蚓被移开或驱逐以后，四个处理是被建立：保留最高的土壤(05厘米，等于H层)(H)，移开最高的土壤并且增加新鲜垃圾(Le)，移开最高的土壤并且补充说分解半的垃圾(李)，和没有最高的土壤也不任何东西的控制乱丢东西(CK)。五使随机化在顶上与尼龙网被围住的块在每个地点被建立，然后四个处理在每块随机被安排。在23个月以后，蚯蚓用福尔马林方法被收集。结果证明尽管它也在处理Le和李被发现，那个Ocnerodrilus西方人是比较喜欢的处理H；尽管有时它也出现在处理H，Amynthascorticis比较喜欢处理李；并且Amynthassp，另一epigeic种，主要是在处理Le下面的现在并且仅仅偶尔出现在处理H。这些调查结果证实属于不同的生态的组的那蚯蚓种在不同分解阶段有不同回答到有机物。蚯蚓社区的影响由O统治了。西方人主要在崽分解的以后的时期被显得。

简介：湿氧化过程，即，Walkley黑(WB)方法，是为土壤有机物(SOM)的决心的一个平淡、相对精确、流行的方法，但是它是费时间的，昂贵并且也，因为铬和强壮的酸的处理，引起环境污染的一个高潜力在这分析使用了。因此，loss-on-ignition(LOI)过程，为SOM评价的一个简单、便宜的方法，也避免铬的酸浪费，值得更多的注意。这研究的目的与LOI(SOMLOI)和WB(SOMWB)方法学习在SOM之间的统计关系决心在二个主要平原，Shahrekord和Koohrang平原比较SOM的空间可变性，Chaharmahal-va-Bakhtiari省，伊朗。五十件表面土壤样品(025厘米)随机在每个平原被收集在300，360，400，500和550慨杮慥汢?漨?捡楴敶?慃愠摮?用WB方法和LOI过程决定SOM?愠摮琠瑯污?愠摮??慨?潰楳楴敶挠牯敲慬楴湯?楷桴丠???摡潳灲楴湯

简介：Citricandmalicacidsatconcentrationsof0.1,1.0,10,and100mmol/LwereaddedtothreeUltisolsandoneOxisol,TheamountofPinsolutionincreasedwithincreasingorganicacidconcentrations,whiletheamountofFe-andAl-boundPdecreased.ThisresultsuggestedthatnaturallyoccurringproductsoforganicmatterdecompositioncouldincreasethePavailabilitytoplantsinsoilswherethereisarelativelylargepoolofFe-andAl-boundP.Theinteractionsbetweencitricandmalicacidsattheaboveconcentrations,andpaddedatratesof10,20,40,and80mg/kgweredetermined.Atzerolevelsoforganicacids,alladdedPbecameeitherlabileorbound,andgreaterproportionsremainedsolubleastheconcentrationoforgaicacidsincreased,whichsuggestedthatorganicacidsreducedfixationofdissolvedPinFe-andAL-richsoils.AgriculturalpracticeswhichincreaseorganicmatterinputonP-deficientacidsoildcoulddecreasePdeficiency,Thiswouldbeimportantinmanytropicalandsubtropicalregionswherethesesoilsarecommon,andwherethecostsoffertilizersandlimearerelativelyhigh.

简介：TheroleoforganicmatterintheformationandstabilityofsoilaggregatesinmulberryplantationintheHang-Jia-HuPlain,northernZhejiangProvince,wasevaluatedinthisstudy.Apositivecorrelationwasfoundbetweenwater-stableaggregatecontentsandorganicmattercontentsinthemulberryplantationsoils,whichsupportedthehypothesisthatorganicmatterwasthemaincementingagentinformationofaggregates.Aclosecorrelationwasalsofoundbetweenstabilityofaggregateandorganicmattercontents.Regressionanalysisshowedthattotalnitrogencontentwasalsoanindicatorofwater-stableaggregatecontentandstability.Theaggregatesizedistributionindicatedthatthewater-stableaggregates1～0.25mmindiameterwerethemajorcomponentoftheaggregatesinthemulberryplantationsoils.Theorganicmattercontentsofaggregatesrangingfrom5to0.25mmindiameterincreasedwiththedecreaseofaggregatesizes,andtheaggregates1～0.25mmindiameterhadthemaximumorganicmattercontent.

简介：Soilsamplesat0-10cmindepthwerecollectedperiodicallyatpairedfieldsinCorvallis,Oregon,USAtocomparedifferencesinsoilmicrobialandfaunalpopulationsbetweenorganicandconventionalagroecosystems.Resultsshowedthattheorganicsoilecosystemhadasignificantlyhigher(P＜0.05)averagenumberorbiomassofsoilbacteria;densitiesofflagellates,amoebaeofprotozoa;somenematodes,suchasmicrobivorousandpredaceousnematodesandplant-parasiticnematodes;aswellasCollembola.GreaternumbersofRhabditida(suchasRhabditisspp.),werepresentintheorganicsoilecosystemwhilePanagrolaimusspp.werepredominantintheconventionalsoilecosystem.TheomnivoresandpredatorsofAcarinaintheMesostigmata(suchasDigamasellidaeandLaelapid),andProstigmata(suchasAlicorhaiidaeandRhagidiidae),werealsomoreabundantintheorganicsoilecosystem.However,fungivorousProstigmata(suchasTerpnacaridaeandNanorchestidae)andAstigmata(suchasAcarida)weresignificantlyhigher(P＜0.05)intheconventionalsoilecosystem,whichsupportedthefindingthattotalfungalbiomasswasgreaterintheconventionalsoilecosystem.Seansonalvariationsofthepopulationdependedmostlyonsoilmoistureconditionandfoodwebrelationship.ThepopulationdeclinedfromMaytoOctoberforbothagroecosystems.However,higherdiversitiesanddensitiesofsoilbiotasurvivedoccurredintheorganicsoilecosysteminthedryseason.

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：构造Technosols可以是为创造城市的绿空格的一种选择。然而，从人工品的集会出现的水疗院结构的性质从来没被记录过。土壤收缩曲线(SSC)能关于构造Technosols提供相关结构的信息，例如保持每个毛孔系统(macropores和micropores)的能力的水。这研究的目的是(i)评估SSC和水保留曲线(WRC)描述构造Technosols的结构并且(ii)在土壤上满足水疗院结构的性质理解有机物的影响。在这研究，Technosols被混合绿浪费堆肥(GWC)，材料从土壤(古日耳曼语字母之一)的深地平线挖掘了获得。GWC从0%～50%在六个不同容量的百分比与古日耳曼语字母之一被混合(GWC/total)。GWC和古日耳曼语字母之一展出了高度分叉的水疗院结构的性质：SSC为GWC是夸张的并且为古日耳曼语字母之一S字形。所有六个混合处理(0%，10%，20%，30%，40%和50%GWC)展出了古典S字形的形状，揭示毛孔系统的二个嵌入的层次。20%GWC处理是类似于30%和40%GWC处理的水疗院在结构上；那么，广泛的GWC的大数量是不必要的。有GWC百分比的关系是一二度为在micropores的容量的可得到的水的方程，但是为在macropores和全部的容量的可得到的水的容量的可得到的水是线性的。在50%GWC处理的全部的容量的可得到的水在0%GWC处理象那一样两次高。由联合SSC和WRC，增加GWC百分比增加了由减少保持能力的水在收缩限制的浸透水的micropores的最大的相等的尺寸并且增加浸透水的macropores的最大的相等的尺寸，导致能保留可得到的水的毛孔直径的一个增加的范围。

简介：Effectsoforganicfertilizersandeffectivemicrobesonlefwaterretentionofsweetcorn(ZeamaysL.cv.Honey-Bantam)werestudied.Sweetcornsweregrownwithorganicorchemicalfertilzerswithorwithouteffectivemicrobes(EM).Awaterretentionurvewasobtainedbydryingtheexcisedleavesunderalightof500μmol(m^2.s)^-1,Thecureshowstwodistinctphases.Theinitialsteepslopeindicatesthewaterlossspeedbystomataltranspiration(Est)andthegentleslopeofthesecondphaseindicateswaterlossspeedbycuticulartranspiration(Ecu).BothEstandEcuwerelowerforleavesofplantsgrownwithorganicmaterialsthanfrothoewithchemicalfertilizers.AdditionofEMtobothorganicandchemicalfertilizersdecreasedEstbutshowednoeffectonEcu.Thewaterretentionabilityoftheexcisedleaveswasproportionaltopho-tosyntheticmaintenanceabilityundersoilwaterdeficitconditionsaswellasthesolteconcentrationinleaves,TheresultssuggestedthatorganicfertilizationandEMappicationincreasedwaterstressresistancebothunderinsituconditionsandinexcisedleavesofsweetcornplants.

简介：Along-termexperimentbeginningin1981inJinxianCountyofJiangxiProvince,subtropicalChina,wasconductedinapaddyfieldunderadoublericecroppingsystemwithfourdifferentfertilizationregimes,including1)nofertilizerascontrol(CK),2)balancedchemicalN,P,andKfertilizers(NPK),3)organicmanureusingmilkvetchandpigmanureintheearlyandlatericegrowingseason,respectively(OM),and4)balancedchemicalfertilizerscombinedwithorganicmanure(NPKM).Samples(0-17cm)ofthepaddyfieldsoil,whichwasderivedfromQuaternaryredclay,werecollectedafterthelatericeharvestinNovember2003fordeterminationoftotalorganiccarbon(TOC)andtotalnitrogen(TN)andfractionsoforganicCandN.ResultsshowedthatTOCandTNintheNPKMandOMtreatmentsweresignificantlyhigherthanthoseinothertwotreatments(CKandNPK).ApplicationoforganicmanurewithorwithoutchemicalfertilizerssignificantlyincreasedthecontentsofallfractionsoforganicCandN,whereaschemicalfertilizerapplicationonlyincreasedthecontentsofoccludedparticulateorganicC(oPOC)andaminoacidN.Inaddition,applicationoforganicmanuresignificantlyenhancedtheproportionsoffreeparticulateorganiccarbon(fPOC)andoPOCintotalC,andthoseofaminosugarNandaminoacidN(P<0.01)intotalN.Incontrast,chemicalfertilizerapplicationonlyincreasedtheproportionsofoPOCandaminoacidN(P<0.05).TherewerenosignificantdifferencesineithercontentsorproportionsofsoilorganicCandorganicNfractionsbetweentheNPKMandOMtreatments.TheseindicatedthatorganicmanureapplicationwithorwithoutchemicalfertilizersplayedthemostsignificantroleinenhancingsoilorganicCandNquantityandqualityinthepaddyfieldstudied.

简介：Thirteensedimentcoresamples(0-10cm)weretakenfromthesevenlakesinthemiddleandlowerreachesoftheYangtzeRivertodeterminethecontentsanddistributionsoforganicphosphorus(P)fractionsinthesedimentsoftheshallowlakesinthearea.TheorganicPfractionsinthesedimentswereintheorderofmoderatelylabileorganicP(MLOP)>moderatelyresistantorganicP(MROP)>highlyresistantorganicP(HROP)>labileorganicP(LOP),withaverageproportionalratiosof13.2:2.8:1.3:1.0.LOP,MLOP,andMROPweresignificantlyrelatedtothecontentsoftotalorganiccarbon(TOC),water-solubleP(WSP),algal-availableP(AAP),NaHCO3-extractableP(Olsen-P),totalP(TP),organicP(OP),andinorganicP(IP).However,HROPwassignificantlyrelatedtoOPandweaklycorrelatedwithTOC,WSP,AAP,Olsen-P,TPorIP.ThissuggestedthatorganicP,especiallyLOPandMLOPinsediments,deservedevengreaterattentionthanIPinregardstolakeeutrophication.IntermsoforganicP,sedimentsweremorehazardousthansoilsinlakeeutrophication.AlthoughOPconcentrationswerehigherinmoderatelypollutedsedimentthanthoseinheavilypollutedsediment,LOPandMLOPwerehigherintheheavilypollutedsediment,whichindicatedthatheavilypollutedsedimentwasmorehazardousthanmoderatelypollutedsedimentinlakeeutrophication.

简介：Low-molecular-weight(LMW)organicacidsexistwidelyinsoilsandhavebeenimplicatedinmanysoilprocesses.TheobjectiveofthepresentpaperwastoevaluateeffectoftwoLMWorganicacids,citricacidandoxalicacid,onCl-adsorptionbythreevariablechargesoils,alatosol,alateriticredsoilandaredsoil,usingabatchmethod.TheresultsshowedthatthepresenceofcitricacidandoxalicacidledtoadecreaseinCl-adsorptionwithlargerdecreasesforcitricacid.AmongthedifferentsoilsGl-adsorptioninthelateriticredsoilandtheredsoilwasmoreaffectedbyboththeLMWorganicacidsthanthatinthelatosol.

简介：在南部的中国的大米小麦旋转被经常的排干洪水的水政体和重氮(N)授精描绘。有进溶解的器官的氮的行为的研究的实质的缺乏(穿上)在强烈地管理的agroecosystem。在situ地实验3年的A被进行决定穿上沥滤并且它在6个连续大米/小麦季节由授精，灌溉和降水影响了的季节、每年的变化。在常规N实践下面(300kgN哈为米饭和200kgN的−1哈为小麦的−1)，季节的一般水准在leachate(100厘米土壤深度)穿上集中因为三个米饭和小麦季节是0.6–1.1和0.1–2.3mgNL−1,分别地。累积穿上沥滤被估计是1.1–2.3kgN哈为米饭季节和0.01–1.3kgN的−1哈为小麦季节的−1，与1.1–3.6kg的一个年度总数N哈−1。在大米季节，N化肥有小效果(P>0.05)在上穿上沥滤；降水和灌溉进口了3.6–9.1kgN哈−1穿上，它可以因此隐藏授精效果在上穿上。在小麦季节，N授精有积极效果(P<0.01)在上穿上。不过，这提升效果被可变降水强烈影响，它也带了1.8–2.9kgN哈−1穿上进地。尽管有到使用的化学N和大变化的一个很小的比例，走水路驾驶政体，穿上沥滤必然与另外的自然生态系统相比由于它的相对更大的数量在大米小麦旋转涉及综合的地N预算。

简介：Afieldexperimentwasconductedfortwoconsecutiveyearsinafarmer'sfieldatHajiMoraVillage,DeraIsmailKhan(D.I.Khan)intheNorthwestFrontierProvince(NWFP)ofPakistantocomparevariousmanagementpractices,suchastheeffectofvariousorganicmanuresandgypsuminarice-wheatcroppingsystemonasaline-sodicEntisol(Zindanisoilseries).Thetreatmentsconsistedof1)acontrol(rice-wheat),2)gypsum,3)farmyardmanure(FYM),4)berseem(TrifoliumalexandrinumL.)asgreenmanure(GM),and5)dhancha(Sesbaniasp.)asGM.Alltreatmentsincreasedyieldsofbothriceandwheatsignificantly(P＜0.01)overthecontrol,withthegreenmanuretreatmentsprovingmoreeconomicalthantheothers;whiletheydecreasedpH,electricalconductivity(EC),andsodiumadsorptionratio(SAR)ofthesoil.Saturationpercentageandavailablewaterofthesoilwereraisedforalltreatmentsduetoanincreaseinorganicmattercontentofthesoil.

简介：Changesofsoilorganicnitrogenformsandsoilnitrogensupplyundercontinuousricecroppingsystemwereinvestigatedinalong-termfertilizationexperimentinJinhua,ZhejiangProvince,China.ThefertilizertreatmentsincludedcombinationofP-K,N-K,N-P,andN-P-Kaswellasthecontrol.Aftersixyearsofcontinuousdouble-ricecropping,totalsoilNandhydrolysableNcontentsremainedstableinplotswithNtreatments,whilethehydrolysableNcontentsweresubstantiallyreducedinthoseplotswithoutNapplication.Comparedtotheunbalancedfertilizationtreatments,PandKincreasedthepercentageofhydrolysableammoniumNinthetotalsoilNwiththebalancedapplicationofN,andalsomaintainedhigherricegrainyieldsandnitrogenuptake.GrainyieldwaspositivelycorrelatedwithtotalNuptake(r=0.875**),hydrolysableN(r=0.608**),hydrolysableammoniumN(r=0.560**)andthehydrolysableunknownN(r=0.417**).TotalNuptakewaspositivelycorrelatedwithhydrolysableN(r=0.608**),hydrolysableammoniumN(r=0.440**)andhydrolysableunknownN(r=0.431**).Soilnutrientdepletionand/orunbalancedfertilizationtoricecropreducedNcontentinsoilmicrobialbiomass,andthereforeincreasedC/Nratio,suggestinganegativeeffectonthetotalmicrobialbiomassinthesoil.

简介：因为它的高收益潜力，到边缘的地点的改编，和忍耐，Switchgrass(PanicumvirgatumL.)作为持续bioenergy庄稼被建议了到水和滋养的限制。生物资源精力庄稼生产的潜在的效果的更好的理解在土壤上练习生物性质，有机物动力学对它的生产批评。我们的目的在学院车站，达拉斯，和Stephenville是与成长得典型地的庄稼相比在不同土壤在温暖季节的长期的switchgrass下面在C水池评估变化镇定的，在2001年2月的TX。采样深度是05，515，和1530厘米。Switchgrass增加了土壤器官的C(SOC)，玷污微生物引起的生物资源C(SMBC)，mineralizableC，和与常规收割相比的微粒有机物C(POM-C)系统。土壤C集中在顺序：长期的沿海的bermudagrass[Cynodondactylon(L.)Pers.]switchgrass1997>常规收割系统。土壤C集中趋于与增加泥土内容增加。更大的微生物引起的生物资源C跟随了达拉斯的顺序>学院车站>Stephenville，并且在达拉斯在Stephenville从约180mgCkg1土壤到1900mgCkg1土壤。微粒器官的C比对管理的另外的部分更敏感，像在与常规收割系统相比的长期的沿海的bermudagrass下面的6褶层一样增加。我们的学习显示进switchgrass生产的常规收割系统的变换能扣押更多的SOC并且改进土壤在南部的美国的生物性质。