简介：ThereisabundanceofMercurymineresurcesintheFanjinshanMountain,Miningmercuryhasalonghistorythere,TheconcentrationofgeseousHgproducedinsmeltingHereaches20-50mg/m^3inthetailgas.Becausemercuryelementisaneasilytransferringmicroelement,thepapertalksabouttheeffectofmercuryinHgmininginGuizhouProvinceonalpinesoil,analysesHgcontentinalpinesoilat2000mofrelativeelevationintheHgminingarea,andexploresforcausesoftheHgpollution.

简介：Miningactivitiesleaverawandpartlyartificialsoilsondumpsandtips.Apriorobjectiveoflandreclamationinsuchareasistorestoreandcultivatenewsoilswhichwillfulfiltheirfunctionsasahabitatforplantsandanimalsandasaregulatorinthecyclingofmatterandwaterinthelandscapeaswellasaproductionsiteforagricultureorforestry.Thispapergivesanoverviewonmajorchallengesandprinciplesofsoilreclamationforagricultureandforestry,reportingsomeresultsofresearch...

简介：Toprovidegeneticinformationandmaterialsforbreedinghybridjaponicaricewithwideadaptabilityandstrongcompetitiveadvantageofyield,eliteallelesandtheircarriervarietiesofgrowthduration(GD)andproductivepaniclenumberperplant(PN)weredetected.Anaturalpopulationcomposedof94japonicavarietieswasphenotypedfortheGD,PNandplantheight(PH)intwoenvironments.TheconditionalphenotypicdataweretransferredbythelinearmodelmethodinsoftwareQGAStation1.0,andassociationmappingbasedontheunconditionalandconditionalphenotypevaluesofGDandPNwasanalyzedbyusinggenerallinearmodelinsoftwareTASSEL.Atotalof34simplesequencerepeat(SSR)markerlociassociatedwithGDandPNweredetectedinthetwoenvironments.Amongthem,15wereassociatedwithGD,and19wereassociatedwithPN.FoureliteallelesofRM8095-120bp,RM7102-176bp,RM72-170bpandRM72-178bpwereassociatedwithGD,andtheircarriervarietieswereHongmangshajing,Nipponbare,HongmangshajingandNannongjing62401,respectively.TheseeliteallelesfromthecarriervarietiescanshortenGDby2.039.93dwhentheywereintroducedintoimprovedmaterials.RM72-182bpassociatedwithPNwasaneliteallele,anditscarriervarietywasXiaoqingzhong.ItcanincreasePNbythreewhenintroducedintoimprovedmaterials.Moreover,theseeliteallelescanbeusedtoimprovetargettraitswithoutinfluencinganothertwotraits.

简介：Nutrient-poor,sandysoilsformtheprevailingsubstrateatpost-miningsitesoftheLusatianregion(Brandenburg,Germany)andpresentachallengeforvegetationdevelopment.Westudiedtheorganicacidquantityandcompositionofthreecommonlyoccurringpioneerplantspecies,thelegumesLotuscorniculatusL.andTrifoliumarvenseL.andthegrassCalamagrostisepigeios(L.)Roth,todetermineifplantgrowthandexudationdifferedwith(non-sterilizedsoil)andwithout(sterilizedsoil)anindigenoussoilmicrobialcommunity.Weinvestigatedwhetherorganicacidswerefoundintherhizosphereandsurroundingsoilandwhetherthisinfluencednutrientmobilization.Thisstudyconsistsoflinkedfieldinvestigationsandagreenhouseexperiment.Plantsweregrowninthegreenhouseineithersterilizedornon-sterilizedsandysoilfromareclamationsiteintheLusatianmininglandscape(WelzowSu¨d,EastGermany).Aftersevenmonths,theplantbiomass,rootmorphology,organicacids,andwater-solublenutrientsandrootcolonizationwitharbuscularmycorrhizalfungi(AMF)anddarkseptateendophytes(DSE)wereanalyzed.RootsofallthreeplantsinthefieldandgreenhouseexperimentswerehighlycolonizedwithAMF.CalamagrostisepigeiosandT.arvensehadasignificantlyhighercolonizationfrequencywithDSEthanL.corniculatus.Thequantityandcompositionoforganicacidsstronglydifferedamongplantspecies,withthehighestnumberoforganicacidsfoundforL.corniculatusandlowestforC.epigeios.Thequantityoforganicacidswasgreatlyreducedinallplantsundersterilizedsoilconditions.However,thecompositionoforganicacidsandplantgrowthinsterilizedsoilwerereducedforbothlegumes,butnotforC.epigeios,whichhadahigherbiomassundersterilizedconditions.Changesinnutrientconcentrationsinthefieldrhizospheresoilrelativetothoseinthecontrolweremeasurableaftersevenmonths.Whilethespectrumoforganicacidsandthegrowthoflegumesseemedtobedependentonahighly